View allAll Photos Tagged Absorption
Timberland 6” Premium Waterproof Boots, 6 Inch, Men’s Size 10, Tan, Natural Horween, A1JJB, TB0A1JJB, UPC 190852615801, EAN 0190852615801, Premium waterproof Horween Latigo leather uppers, Seam-sealed waterproof construction, Direct-attach construction for durability, Leather lining for comfort and durability, Rustproof hardware, anti-fatigue technology, 200 grams of PrimaLoft® insulation, Padded collar for a comfortable fit around the ankle, Anti-fatigue midsole and removable footbed for all-day comfort, lightweight cushioning and shock absorption, Rubber lug outsole is made with 10% plant-based materials,
is a suspended tile which is installed in a grid system. The tile allows excellent sound absorption characteristics and is available in a square edge finish.
Wetlands are biodiversity rich sensitive ecosystems that harbor hundreds of plants, insects, birds and other animals uniquely adapted to their wetland mode of life.They are crucial to maintain the regional water balance through ground water recharge and absorption of flood waters and also serve as the rice bowl of developing countries. Nevertheless, wetlands play immense role in the socio-economic and livelihood aspects of local communities living around the wetland. In India, rural communities depend wetland for livelihood through farming, mat making etc; for food through fishing and hunting; for roof thatching by collection of reeds and palm leaf ; for firewood; for fodder etc. However, these wetlands are now under a threat of conversion for big industrial and real estate projects, change in lifestyle of local community, over extraction of resources by increased population, pollution,waste dumping, eutrophication and pesticide farming. There are three important wetlands in the Puducherry region namely Oussudu, Bahour and Kaliveli that provide important resources for local communities and also are a home to tens of thousands of migratory birds that visit the Puducherry region in winter. These wetlands have been acknowledged as Important Bird Areas(IBAs) by IBCN, since many of these birds are represented in more than 1% of their global population.
The recent threat on wetlands of Puducherry is more due to the change in life style of local community living around these wetlands. The younger generation is not much dependent on wetland resources, The younger and modern generation has lost the compassion and bonding to the wetland which their forefathers maintained through sustainable livelihood practices. This has resulted in a change in attitude and perception of the community towards unsustainable farming and resource extraction, game hunting, intensive fishing and reclamation, ultimately resulting in shrinking of wetland area and loss of biodiversity at an alarming pace. Local community is leaving the traditional farming practices for more fertilizer and pesticide based farming; fish stock is depleted using invasive Gill nets. Since Puducherry is fast developing region with rapidly growing commercial tourism and industrial establishments, these wetlands are under the threat of reclamation for resort construction and other commercial establishments. Poaching for a sport as well as open selling of birds including the threatened species is common. School drop-out are noticed to get attracted to such practices to make easy money as well as hunting for a sport with peers. With time, they may grow into expert hunters who will depend on poaching as the main source of income for the family. There are many wetland awareness programs organized by Forest Department as well as NGOs targeting school kids and educated community through workshops. School drop-outs are often not specially targeted by any of such programs and often not brought under the ambit of such programs. This gap needs to be addressed for local conservation efforts to be fully effective. We have chosen birds as the umbrella species whose conservation will in turn protect the lake and biodiversity as a whole. Birds are attractive and beautiful; ,which may easily get compassion from drop-out kids if guided appropriately. With proper efforts, the poachers can be turned to protectors and expert tour guides to facilitate ecotourism.
via
How Your Septic System Works
Septic systems are underground wastewater treatment structures, commonly used in rural areas in Harwood, North Dakota without centralized sewer systems. They use a combination of nature and proven technology to treat wastewater from household plumbing produced by bathrooms, kitchen drains, and laundry.
A typical septic system consists of a septic tank and a drainfield, or soil absorption field.
The septic tank digests organic matter and separates floatable matter (e.g., oils and grease) and solids from the wastewater. Soil-based systems discharge the liquid (known as effluent) from the septic tank into a series of perforated pipes buried in a leach field, leaching chambers, or other special units designed to slowly release the effluent into the soil or surface water.
Alternative systems use pumps or gravity to help septic tank effluent trickle through sand, organic matter (e.g., peat and sawdust), constructed wetlands, or other media to remove or neutralize pollutants like disease-causing pathogens, nitrogen, phosphorus, and other contaminants. Some alternative systems are designed to evaporate wastewater or disinfect it before it is discharged to the soil or surface waters.
Harwood septic services
Specifically, this is the way a standard septic system functions:
All water flows from your home from the main water drainage pipe right into a septic tank.
The septic tank is usually a buried, water-tight container commonly made from concrete, fiberglass, or polyethylene. Its task is usually to keep the wastewater for enough time to permit solids to settle to the bottom part of the tank forming sludge, as the oil and grease floats up to the top of the tank as scum.
Storage space and a T-shaped outlet stop the sludge and scum from departing the tank and going in to the drainfield.
The liquid wastewater (effluent) then leaves the tank into your drainfield.
The drain field is usually a shallow, protected, excavation produced in unsaturated dirt. Pre treated wastewater is released through pipes on to porous areas that permit wastewater to separate out though the dirt. The dirt will accept, treats, and disperses… wastewater as it percolates throughout the dirt, eventually releasing to groundwater.
In the event the drainfield is beyond capacity with an excessive amount of liquid, it will eventually overflow, creating sewage to flow to the ground surface area or generate backups in bathrooms.
Lastly, the wastewater percolates in to the dirt, naturally eliminating dangerous coliform bacteria, viruses and nutrients. Coliform bacteria is a small grouping of bacteria mainly inhabiting the digestive tract of human beings or any other warm-blooded creatures. It becomes an indication of human being fecal contaminants.
Have you got a septic system?
You might already know you possess a septic system. If you don’t know, listed here are tell-tale symptoms that you simply should do:
You utilize well water.
The waterline entering your house doesn’t have a meter.
You display a “$.00 Sewage Amount Charged” on your own water invoice or house government tax bill.
Others who live nearby possess a septic system.
How to locate your septic system
After you have established that there is a septic system, you will find it by:
Searching for your home or office’s plat drawing.
Examining your lawn for lids and manhole covers.
Getting in contact with a septic technician or pumper to assist you locating it.
Malfunction signs and symptoms: Pay attention to the indicators!
A bad smell isn’t necessarily the very first indication of a broken septic system. Contact a septic specialist if you see any of these:
Wastewater backing up into your bathroom show or any drains.
Vibrant green, mushy lawn around the drain field even throughout dry climate.
Standing water or muddy dirt all around your septic system or perhaps in your basement.
A powerful smell near the septic tank and drain field.
Contact Portapro Septic Services to ask a question or schedule an appointment. You can reach them at 701-330-5656
from Portapro Septic Services portaprosepticservices.com/septic-tank-pumping-harwood-nd/ portaprosepticservices.tumblr.com/post/158928364590
For the test film of the Jupiter-9 lens I mounted it on the Leningrad camera (see below for detail about the lens and the camera). The lens was fitted with a generic yellow filter (screw-on 49mm) and a generic cylindrical metal shade hood designed for a 50mm lens. By safety, a lens cap fitted on the hood (55mm) was also used to protect the shutter curtains from an accidental sun burning (I forgot twice to remove the cap before shooting...)
I loaded the Leningrad with a Rollei RPX 400 film exposed for 250 ISO to compensate the absorption of the yellow filter. The light metering was done using a Minolta Autometer III with the 10° viewer for selective metering privileging the shadows areas.
The viewer of the Leningrad has build-in frame for the 85mm and is fully compensated for the parallax error.
View Nr. 8 : 1/500s f/8 focusing @ 8m
Les Quais du Rhône, February 17, 2025
Quai Victor Augagneur
69003 Lyon
France
After completion, the film was rewound and processed using 350 mL of Adox Adonal (Agfa Rodinal) developer prepared at the dilution 1+25 for 12min15 at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) fitted to a Minolta Auto Bellows III with the Minolta slide duplication accessory and Minolta Macro Bellow lens 1:3.5 f=50mm. The diffuse light source was a LED panel CineStill Cine-lite.
The RAW files obtained were inverted within the latest version available of Adobe Lightroom Classic (version 14.2) and edited to the final jpeg pictures without intermediate file. They are presented either as printer files with a frame or the full size JPEG's together with some documentary smartphone color pictures.
About the camera :
After several months, my local repair shop gave up to repair my first exemplary of Leningrad camera. I got that GOMZ Leningrad for less than the price of the lens (50€) a year ago (February 24, 2024, flic.kr/s/aHBqjBftyP) at the monthly collector meeting in Saint-Bonnet-de-Mure, near Lyon, France. I looked then again for a working one.
Leningrad’s are fascinating Russian range-finder 35mm camera’s produced in Leningrad (USSR) / Saint-Petersburg, from 1956 to 1968 at about 76.000 units. It is not really a rare camera but appears only from time-to-time in the classical collector’s networks.
The Leningrad camera project was developed by GOMZ company (ГОМЗ, Государственный оптико-механический завод, Ленинград = Gosularstvennyi Optiko-Mekhanicheskii Zavod =State Optical-Mechanical Factory), Leningrad, USSR. The Leningrad ’s were constructed to a very high degree of precision and likely the most advanced rangefinder ever made at that time in Russia. At the 1958 World Exposition in Brussels, the Leningrad was awarded the "Grand Prix de Bruxelles”. Modified Leningrads were also used in the Soviet space program. In addition to a complex parallax-compensated multi-focal (for 3.5, 5, 8.5 and 13.5cm) collimated system, the camera has a built-in spring-powered mechanical motor for an automated film advance after each view taken. The Leningrad mounts the 39mm Leica-type thread lenses, especially of the Jupiter series of lens derived of classical Carl Zeiss lenses designed for the Contax (Biogon 3.5cm and Sonnar’s 5, 8.5 and 13.5cm).
In 1965, GOMZ became LOMO ( ЛОМО, Ленинградское oптико-механическое oбъединение (Leningradskoïe Optiko-Mekhanitcheskoïe Obiedinienie) that is still existing, producing instrumental optical devices (www.lomo.ru).
On eBay, I focused on a LOMO Leningrad year 1965 in working condition but without the original film plate. I got the camera for 130€ including the leather bag and a standard lens Jupiter-8 1:2 f=5cm. The seller adapted cleanly a different film plate that looked to work, but my idea was to use the camera back of my faulty Leningrad. This film plate may a precision glass plate special designed for optimum film transport and optical planarity. I received my new Leningrad on January 31, 2025 in good condition.
After a very careful inspection and a detailled cleaning, I decided to make a test film using a FOMAPAN 200 black-and-white film. On the Leningrad it is said that there is absolutely no way to check the correct film advance during the shooting session. The rewind should not be up since the mechanical forces induced would be too high for the spring-powered spooling barrel. The film should be also in a quality not too tight film cartridge and should be checked before use. This stressful machine should be manipulated with maximum care when not familiar with it.
About the lens Jupiter-9:
New in my collection in Feb. 2025, this very popular lens Jupiter-9 1:2.8 f=85mm for my Zorki’s and Leningrad camera’s. The lens was produced in 1978 by the LZOS company (Лыткаринский завод Оптического Стекла , Lytkarino Zavod Optychisovo Sticklo) located in Lytkarino (about 100 km Noth to Moscow).
I sourced a clean exemplary in Germany at regular price given the popularity of the Jupiter-9 (170€) with the Leica 39mm thread mount, front and rear caps plus the lens black storage canister. The lens is popular especially among videographers due to its peculiar bokeh and perfectly round shaped diaphragm made of 15 blades.
Originally, the Jupiter 9 is based on the design of the Carl Zeiss Sonnar designed for the Zeiss Ikon Contax in the years 1930’s. Production began in USSR in 1948, when the lens was initially called the ЗК-85 (Sonnar Kransogorsk) and it was assembled using mostly German parts in Contax/Kiev mount. The lens was also adapted to Zorki (M39) mount to fit the Zorki cameras early in production It appears, for both Zorki and Kiev mount, in a 1949 catalogue. By 1951 the name changes to Jupiter 9 (Юпитер-9). The lens has seven glass elements in three groups; a single glass at the front, and two cemented groups of three. All versions of the lens are coated. It was made by the KMZ (Красногорский механический завод, Krasnogorski Mekhanicheskii Zavod) and LZOS factories, in Leica 39 mm thread mount for Fed and Zorki rangefinders, but originally it was a Contax bayonet used in Kiev cameras. Jupiter-9 lenses were also made at the Arsenal factory in Ukraine, for Kiev rangefinders,but initially released as KMZ. It was later adapted for M42-mount Zenit SLR cameras, with an M24×1 thread mount.
Our ACDA - 10 broadband absorber positioned horizontally on the floor behind the amplifiers and along the left side wall. There are also additional units in each closet to tame the low frequency resonances found there. The blue fabric panels house our 2" foam technology to tame front and side wall reflections.
Read more about lurgi double absorption sulfuric acid oleum plant production equipment type for sale From IPPE. Visit Us Today!.www.sulfuricacidplants.com
Acoustic Panels are used to control the noise in an indoor environment, which can be irritating. Soundhush provides sound absorption panels for use in both indoor or open air applications can be manufactured in customized sizes to meet your requirement. We have a wide range of architectural and decorative acoustic wall panels.
Nike Air Force 1 High Dream Team, Size 5.5Y, White, Black, 653998-102, UPC 00885176668243, 2016, Women’s size 7, Kids High Top Basketball sneaker, "Dream Team" mini-collection, USA 1992 basketball Team, perforated white leather upper, rubber outsole, White midsole, Nike branding on the tongue, Nike Swoosh Branding on the sides, basketball logo at the heel counter, Ankle strap, Polyester tongue, Nike Air branding, Midsole Air-sole for impact absorption, basketball and five stars at the heel, 1992 scripted along the insole,
Nike Air Force 1 High Dream Team, Size 5.5Y, White, Black, 653998-102, UPC 00885176668243, 2016, Women’s size 7, Kids High Top Basketball sneaker, "Dream Team" mini-collection, USA 1992 basketball Team, perforated white leather upper, rubber outsole, White midsole, Nike branding on the tongue, Nike Swoosh Branding on the sides, basketball logo at the heel counter, Ankle strap, Polyester tongue, Nike Air branding, Midsole Air-sole for impact absorption, basketball and five stars at the heel, 1992 scripted along the insole,
Nike Air Force 1 High 07 LV8, Men’s Size 10, Hyper Cobalt, Blue, Gum, 806403-400, suede upper, reflective mesh panels, “AIR” printed on heel, Perforated detailing on the toe box, Perforations for breathability, Nike Swoosh on the sides, Ankle strap for security, Nubuck tongue with Nike Air branding, Midsole Air-sole for impact absorption, Nike Air branding on the heel, Rubber outsole for increased traction, rubber foam sole, Air-Sole cushioning unit, Bruce Kilgore, basketball sneaker, NBA, AF1, Originally released in 1982, named after the aircraft that carries the President of the United States, reddealsonline, eBay sneakers, redd3413, Authenticity Guarantee
Color of Life note
Biofluorescence results from the absorption of electromagnetic radiation at one wavelength by an organism, followed by its reemission at a longer and lower energy wavelength, visually resulting in green, orange, and red emission coloration. Many species of mantis shrimp, for example, make use of fluorescent body parts when in threat display in order to intimidate or confuse either a predator or a competing male.
Ref: Color sources, California Academy of Sciences Docent program May 2015
PLOS one Biofluorescence journals.plos.org/plosone/article?id=10.1371/journal.pone...
TAXONOMY
Kingdom: Animalia
Phylum:Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Stomatopoda
Family: Odontodactylidae
Genus/species: Odontodactylus scyllarus
GENERAL CHARACTERISTICS: Beautifully colored in peacock colors of greens, blues, and reds. Has a green body, blue head, green antennal scales, red limbs. The body is elongated with a long, flattened , blue tail and ranges in size from 3–18 cm (1.2-7.0 in). Highly noticeable is the pair of clubbed-shaped, praying mantis-like claws.
DISTRIBUTION/HABITATS: Indo-Pacific Habitat: warm salt water and builds U-shaped burrows in gravel substrates. Depth ranges from 3-40 m (10-131 ft).
DIET IN THE WILD: Feeds on other shrimp, worms, snails, crabs, mollusks. Lies in wait for prey in front of burrow, then swims out and quickly crushes prey with a strong, powerful smash. The claw moves so quickly it generates cavitation bubbles, which explode with a second powerful burst. The speed with which the claw moves through the watergenerates a force 100 times the shrimp’s body weight.
REPRODUCTION: Monogamous. O. scyllarus mate, spawn, brood, and hatch their eggs in their burrows.
LONGEVITY: Often live in pairs for their entire lifetime (4-6 years).
PREDATORS: Yellow Fin tuna
CONSERVATION: IUCN Not Evaluated
REMARKS: Large peacock mantis shrimp generate forces powerful enough to crush the shell of a large conch, and have been known in captivity to break the glass of their tanks! Striking speed of 50+ mph.
The amazingly complex eyes of mantis shrimp detect 12 base colors (compared to our 3). They also can discern ultraviolet, infrared frequencies, and the polarization of light! .
Location: Water Planet Sensing AQJ16
References
California Academy of Sciences Steinhart Aquarium Water Planet, Senses Cluster (Sight) 2016
Animal Diversity Web animaldiversity.org/accounts/Odontodactylus_scyllarus/
Ron's Wordpress shortlink wp.me/p1DZ4b-We
Ron's flickr www.flickr.com/photos/cas_docents/sets/72157608602469734/
9-8-11, 4-22-13, 8-17-15, 2016
Wetlands are biodiversity rich sensitive ecosystems that harbor hundreds of plants, insects, birds and other animals uniquely adapted to their wetland mode of life.They are crucial to maintain the regional water balance through ground water recharge and absorption of flood waters and also serve as the rice bowl of developing countries. Nevertheless, wetlands play immense role in the socio-economic and livelihood aspects of local communities living around the wetland. In India, rural communities depend wetland for livelihood through farming, mat making etc; for food through fishing and hunting; for roof thatching by collection of reeds and palm leaf ; for firewood; for fodder etc. However, these wetlands are now under a threat of conversion for big industrial and real estate projects, change in lifestyle of local community, over extraction of resources by increased population, pollution,waste dumping, eutrophication and pesticide farming. There are three important wetlands in the Puducherry region namely Oussudu, Bahour and Kaliveli that provide important resources for local communities and also are a home to tens of thousands of migratory birds that visit the Puducherry region in winter. These wetlands have been acknowledged as Important Bird Areas(IBAs) by IBCN, since many of these birds are represented in more than 1% of their global population.
The recent threat on wetlands of Puducherry is more due to the change in life style of local community living around these wetlands. The younger generation is not much dependent on wetland resources, The younger and modern generation has lost the compassion and bonding to the wetland which their forefathers maintained through sustainable livelihood practices. This has resulted in a change in attitude and perception of the community towards unsustainable farming and resource extraction, game hunting, intensive fishing and reclamation, ultimately resulting in shrinking of wetland area and loss of biodiversity at an alarming pace. Local community is leaving the traditional farming practices for more fertilizer and pesticide based farming; fish stock is depleted using invasive Gill nets. Since Puducherry is fast developing region with rapidly growing commercial tourism and industrial establishments, these wetlands are under the threat of reclamation for resort construction and other commercial establishments. Poaching for a sport as well as open selling of birds including the threatened species is common. School drop-out are noticed to get attracted to such practices to make easy money as well as hunting for a sport with peers. With time, they may grow into expert hunters who will depend on poaching as the main source of income for the family. There are many wetland awareness programs organized by Forest Department as well as NGOs targeting school kids and educated community through workshops. School drop-outs are often not specially targeted by any of such programs and often not brought under the ambit of such programs. This gap needs to be addressed for local conservation efforts to be fully effective. We have chosen birds as the umbrella species whose conservation will in turn protect the lake and biodiversity as a whole. Birds are attractive and beautiful; ,which may easily get compassion from drop-out kids if guided appropriately. With proper efforts, the poachers can be turned to protectors and expert tour guides to facilitate ecotourism.
Sonata Class A rated Acoustic panels are used within a wide variety of buildings to reduce reverberation and give a suitable acoustic environment.
Nike Air Force 1 High 07 LV8, Men’s Size 10, Hyper Cobalt, Blue, Gum, 806403-400, suede upper, reflective mesh panels, “AIR” printed on heel, Perforated detailing on the toe box, Perforations for breathability, Nike Swoosh on the sides, Ankle strap for security, Nubuck tongue with Nike Air branding, Midsole Air-sole for impact absorption, Nike Air branding on the heel, Rubber outsole for increased traction, rubber foam sole, Air-Sole cushioning unit, Bruce Kilgore, basketball sneaker, NBA, AF1, Originally released in 1982, named after the aircraft that carries the President of the United States, reddealsonline, eBay sneakers, redd3413, Authenticity Guarantee
via Instagram ift.tt/2iElIMW — The design and construction of an automatic absorption dynamometer for a standard master car builder's drop test machine (1909). Thank you internet archive and no known copyright restrictions. #besttitleever
Timberland 6 Inch Premium Waterproof Boots, Menâs Size 12, Wide, Wheat, Nubuck, TB010061, 100613640, Premium leather uppers, waterproof construction, Leather lining for comfort and durability, Rustproof hardware, anti-fatigue technology, 400 grams of PrimaLoft® insulation, Padded collar for a comfortable fit around the ankle, Anti-fatigue midsole and removable footbed for all-day comfort, lightweight cushioning and shock absorption, Rubber lug outsole is made with 10% plant-based materials, reddealsonline, redd3413,
Sonata Class A rated Acoustic absorption panels are used within a wide variety of buildings to reduce reverberation and give a suitable acoustic environment. SRS are experts in the field of room acoustics and offer a complete service from specification to supply and install. www.soundreduction.co.uk/3se/
Sonata Class A rated Acoustic panels are used within a wide variety of buildings to reduce reverberation and give a suitable acoustic environment.
Timberland 6” Waterproof Boots, Junior Size 7, Pink, Spiced Coral, A1OPB, UPC: 191164322135, TBOA1OPB, Premium waterproof Nubuck Leather uppers, Seam-sealed waterproof construction, Direct-attach construction for durability, Rustproof hardware, anti-fatigue technology, 200 grams of PrimaLoft® insulation, Padded collar for a comfortable fit around the ankle, Anti-fatigue midsole and removable footbed for all-day comfort, lightweight cushioning and shock absorption, Durable, translucent TPU (thermoplastic urethane) lug outsole, 777, reddealsonline, sneaker collection
Nike Air Force 1 High 07 LV8, Men’s Size 10, Hyper Cobalt, Blue, Gum, 806403-400, suede upper, reflective mesh panels, “AIR” printed on heel, Perforated detailing on the toe box, Perforations for breathability, Nike Swoosh on the sides, Ankle strap for security, Nubuck tongue with Nike Air branding, Midsole Air-sole for impact absorption, Nike Air branding on the heel, Rubber outsole for increased traction, rubber foam sole, Air-Sole cushioning unit, Bruce Kilgore, basketball sneaker, NBA, AF1, Originally released in 1982, named after the aircraft that carries the President of the United States, reddealsonline, eBay sneakers, redd3413, Authenticity Guarantee
Sonata Class A rated Acoustic panels are used within a wide variety of buildings to reduce reverberation and give a suitable acoustic environment.
Sonata Class A rated Acoustic panels are used within a wide variety of buildings to reduce reverberation and give a suitable acoustic environment.
Timberland Pro Endurance 6" Steel Toe, Menâs Size 8.5, Puncture Resistant Work Boots, A5601, TB047592, UPC 884447705144, EAN 0884447705144, Premium full-grain leather, Asymmetrical steel safety toe, Electrical hazard protection, Heat oil and slip-resistant rubber outsole, Steel shank for structural support, Metallic puncture-resistant plate, Anti-Fatigue Technology polyurethane footbed for shock absorption and energy return, Timberland PRO rubber double toe and rubber backstay, Dual-purpose top hardware for lacing customization, Breathable and moisture-wicking lining with antimicrobial treatment for odor control, Cement construction for flexibility, red deals online,
Timberland Women’s Jayne 6” Waterproof Boots, Women’s Size 9.5, Burgundy, A1SFD, UPC: 191928439178, EAN: 0191928439178, TBOA1SFD, Timberland Style Number A1SFD605, Premium waterproof Olive Leather uppers, slimmer silhouette, Seam-sealed waterproof construction, Direct-attach construction for durability, Rustproof hardware, anti-fatigue technology, 200 grams of PrimaLoft® insulation, Padded collar for a comfortable fit around the ankle, Anti-fatigue midsole and removable footbed for all-day comfort, lightweight cushioning and shock absorption, Durable, translucent TPU (thermoplastic urethane) lug outsole, 777, reddealsonline, sneaker collection
My photo walk of July 29, 2023, Lyon, France, district of La Croix Rousse, with my Pentacon Praktica VLC3 camera, a German 35mm SLR of the 70's fitted here with a normal lens Pentacon "electric" 1:1.8 f=50mm.
For this session, I loaded an Ilford HP5+ 36-exposure film and I fitted for all the views a 49mm pale yellow (coefficient. x1.5) screw-on filter on the lens.
I exposed the film at 400 ISO for the Praktica CdS cell that gave similar measuring compared to my trusted Minolta Autometer III with 250 ISO setting to compensate the filter absorption. The Autometer III Minolta light meter was fitted with a 10° finder for selective measurements privileging the shadow areas but I mostly used the camera measuring that is quite reliable.
Focusing was done using the Pentacon focusing screen with a central stigmometer.
Shutter speeds from 1/1000s to 1/125s and f/16 to f/5.6 were used along the session between 2pm and 4PM and a very changing light due to clouds passing by.
July 29, 2023
69001 Lyon
France
After exposure, the film was revealed using Adox Adonal (Agfa Rodinal) developper at dilution 1+25 and 20°C for 6 min. The film was then digitalized using a Sony A7 body fitted to a Minolta Slide Duplicator installed on a Minolta Auto Bellows III with a lens Minolta Bellow Macro Rokkor 50mm f/3.5. The RAW files obtained were processed without intermediate files in LR and edited to the final jpeg pictures.
All views (plus some smartphone documentary pictures) of the film are presented in the dedicated album either in the printed framed versions and unframed full-size jpeg
About the camera :
The Praktica VLC is of the 3rd generation (VLC3, 1978-1981) and was manufactured by "VEB Pentacon" (formally Zeiss-Ikon) in Dresden, Germany. It came with a number of orignal Pentacon accessories including, a shade hood for its normal lens Pentacon "electric Multi-coated" 1:1,8 f=50mm, a waist finder, a loup magnification finder, and the regular pentaprism. There are also 6 different focusing screens, the Pentacon hot shoe for a flash, lens and body caps, and a Praktica ever-ready case.
The camera has a CdS photometric circuitry powered by an unusual 4.5V battery that I replaced by a set of 3 LR44 alkaline batteries in series. As the ASAHI PENTAX Spomatic SP, the bridge circuit is insensitive to the voltage difference. To be independent of the finders, the cell is functioning behind the mirror as in the Topcon Super D or the Miranda Auto Sensorex EE.
This Praktica operates at full aperture using an electrical transmission of the aperture using 3 contacts on the M42 lens mount. It could however operates any non electric M42 lenses at real aperture too by acting on the rotary switch at the top left. As for the other Praktica of the L series the shutter is made of vertical steel curtains making the X-flash synchro at about 1/125 s.
Overall Pentacon produced 85 000 Praktica VLC between 1974 and 1981 among about 3 millions of Praktica "L" (LLC MTL TL L etc).
For the test film of the Jupiter-9 lens I mounted it on the Leningrad camera (see below for detail about the lens and the camera). The lens was fitted with a generic yellow filter (screw-on 49mm) and a generic cylindrical metal shade hood designed for a 50mm lens. By safety, a lens cap fitted on the hood (55mm) was also used to protect the shutter curtains from an accidental sun burning (I forgot twice to remove the cap before shooting...)
I loaded the Leningrad with a Rollei RPX 400 film exposed for 250 ISO to compensate the absorption of the yellow filter. The light metering was done using a Minolta Autometer III with the 10° viewer for selective metering privileging the shadows areas.
The viewer of the Leningrad has build-in frame for the 85mm and is fully compensated for the parallax error.
View Nr. : 1/--s f/-- focusing @ -- m
February 17, 2025
69003 Lyon
France
After completion, the film was rewound and processed using 350 mL of Adox Adonal (Agfa Rodinal) developer prepared at the dilution 1+25 for 12min15 at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) fitted to a Minolta Auto Bellows III with the Minolta slide duplication accessory and Minolta Macro Bellow lens 1:3.5 f=50mm. The diffuse light source was a LED panel CineStill Cine-lite.
The RAW files obtained were inverted within the latest version available of Adobe Lightroom Classic (version 14.2) and edited to the final jpeg pictures without intermediate file. They are presented either as printer files with a frame or the full size JPEG's together with some documentary smartphone color pictures.
About the camera :
After several months, my local repair shop gave up to repair my first exemplary of Leningrad camera. I got that GOMZ Leningrad for less than the price of the lens (50€) a year ago (February 24, 2024, flic.kr/s/aHBqjBftyP) at the monthly collector meeting in Saint-Bonnet-de-Mure, near Lyon, France. I looked then again for a working one.
Leningrad’s are fascinating Russian range-finder 35mm camera’s produced in Leningrad (USSR) / Saint-Petersburg, from 1956 to 1968 at about 76.000 units. It is not really a rare camera but appears only from time-to-time in the classical collector’s networks.
The Leningrad camera project was developed by GOMZ company (ГОМЗ, Государственный оптико-механический завод, Ленинград = Gosularstvennyi Optiko-Mekhanicheskii Zavod =State Optical-Mechanical Factory), Leningrad, USSR. The Leningrad ’s were constructed to a very high degree of precision and likely the most advanced rangefinder ever made at that time in Russia. At the 1958 World Exposition in Brussels, the Leningrad was awarded the "Grand Prix de Bruxelles”. Modified Leningrads were also used in the Soviet space program. In addition to a complex parallax-compensated multi-focal (for 3.5, 5, 8.5 and 13.5cm) collimated system, the camera has a built-in spring-powered mechanical motor for an automated film advance after each view taken. The Leningrad mounts the 39mm Leica-type thread lenses, especially of the Jupiter series of lens derived of classical Carl Zeiss lenses designed for the Contax (Biogon 3.5cm and Sonnar’s 5, 8.5 and 13.5cm).
In 1965, GOMZ became LOMO ( ЛОМО, Ленинградское oптико-механическое oбъединение (Leningradskoïe Optiko-Mekhanitcheskoïe Obiedinienie) that is still existing, producing instrumental optical devices (www.lomo.ru).
On eBay, I focused on a LOMO Leningrad year 1965 in working condition but without the original film plate. I got the camera for 130€ including the leather bag and a standard lens Jupiter-8 1:2 f=5cm. The seller adapted cleanly a different film plate that looked to work, but my idea was to use the camera back of my faulty Leningrad. This film plate may a precision glass plate special designed for optimum film transport and optical planarity. I received my new Leningrad on January 31, 2025 in good condition.
After a very careful inspection and a detailled cleaning, I decided to make a test film using a FOMAPAN 200 black-and-white film. On the Leningrad it is said that there is absolutely no way to check the correct film advance during the shooting session. The rewind should not be up since the mechanical forces induced would be too high for the spring-powered spooling barrel. The film should be also in a quality not too tight film cartridge and should be checked before use. This stressful machine should be manipulated with maximum care when not familiar with it.
About the lens Jupiter-9:
New in my collection in Feb. 2025, this very popular lens Jupiter-9 1:2.8 f=85mm for my Zorki’s and Leningrad camera’s. The lens was produced in 1978 by the LZOS company (Лыткаринский завод Оптического Стекла , Lytkarino Zavod Optychisovo Sticklo) located in Lytkarino (about 100 km Noth to Moscow).
I sourced a clean exemplary in Germany at regular price given the popularity of the Jupiter-9 (170€) with the Leica 39mm thread mount, front and rear caps plus the lens black storage canister. The lens is popular especially among videographers due to its peculiar bokeh and perfectly round shaped diaphragm made of 15 blades.
Originally, the Jupiter 9 is based on the design of the Carl Zeiss Sonnar designed for the Zeiss Ikon Contax in the years 1930’s. Production began in USSR in 1948, when the lens was initially called the ЗК-85 (Sonnar Kransogorsk) and it was assembled using mostly German parts in Contax/Kiev mount. The lens was also adapted to Zorki (M39) mount to fit the Zorki cameras early in production It appears, for both Zorki and Kiev mount, in a 1949 catalogue. By 1951 the name changes to Jupiter 9 (Юпитер-9). The lens has seven glass elements in three groups; a single glass at the front, and two cemented groups of three. All versions of the lens are coated. It was made by the KMZ (Красногорский механический завод, Krasnogorski Mekhanicheskii Zavod) and LZOS factories, in Leica 39 mm thread mount for Fed and Zorki rangefinders, but originally it was a Contax bayonet used in Kiev cameras. Jupiter-9 lenses were also made at the Arsenal factory in Ukraine, for Kiev rangefinders,but initially released as KMZ. It was later adapted for M42-mount Zenit SLR cameras, with an M24×1 thread mount.
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