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My photowalk with my Semflex Standard 3.5, a French TLR camera year 1959, Lyon, France June 18, 2024.
The camera was equipped with a Semflex yellow filter x2 and the Semflex metal shade hood. An Ilford PanF+ 120 film was loaded and exposed for 32 ISO (Instead of 50 ISO to compensate in part the filter absorption) using a Minolta Autometer III equipped with a 10° finder for selective measures privileging the shadow areas.
Typically I used the 1/100s (one at 1/50s) with aperture ranging from f/8 to f/4.5.
Les Esses, June 18, 2024
69004 Lyon
France
After the view #12 exposed, the film was fully rolled to the taking spool and was developed in a Paterson tank with a spiral adapted to the 70mm large film. 500 mL of Adox Adonal (Agfa Rodinal) developer were prepared at the dilution 1+25 and the film processed for 6min at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) held on a Minolta vertical macro stative device and adapted to a Minolta MD Macro lens 1:3.5 f=50mm. The light source was a LED panel (approx. 4x5') CineStill Cine-lite fitted with film holder "Lobster" to maintain flat the 70mm films.
The RAW files obtained were inverted within LR and edited to the final jpeg pictures without intermediate file. They are presented either as printed files with frame or the full size JPEG.
About the camera and lenses :
New in my camera collection this French Semflex TLR year 1959-1960 equipped with f=75mm SOM Berthiot lenses.
The SEM company ("Société des Etablissements Modernes de Mécanique") was founded in France by Paul Royet in 1946, in the small city of Aurec near Saint-Etienne (Loire). The SEM camera's was known essentially for the TLR Semflex that were a great commercial success in France until the 70's. The camera's are constructed around an injected aluminum alloy chassis, very resistant and rigid permitting precise optical alignments. The focusing mechanism is made of a cam system like the Rolleiflex giving an accurate and smooth focusing. SEM constructed their own shutters called Orec with 5 leaves capable of the 1/400s to 1s with B.
Semflex received in majority French optics Berthiot with 3 or 4 lenses (Tessar type). Some camera's were also mounted with Angénieux lenses.
Semflex were trusted TLR camera's used by amateurs and for professional purposes. From 1949 to 1976, 171.000 Semflex were produced in many different types and versions.
My Semflex in a middle grade version Standard 3.5 type-10 (1959-1960). It was the last version mounted with the 3-lens SOM Berthiot 1:3.5 f=75mm. I got the camera with set of accessories and several documents including the user manual of the Semflex Standard 4.5 versions. The accessories include a leather SEM ever-ready bag, a Semflex push-on shade hood, a Semflex push-on yellow filter x2 in its original box, and close-focusing lenses. The 1D one is constructed with a prism for the finder lens that compensates the parallax in the zone 1m to 0.5m.
The decorative ring around each lenses can also receive push-on accessories in 36mm diameter as the FOCA or Leitz 36mm filter series. I adapted two protective lens caps from Kodak film canister snapped covers.
Class A Sonata Aurio panels used to reduce reverberation within Sittingbourne Community College's sports hall
Sonata Vario and Memo acoustic absorption panels installed within the hall at The Dales School in Blyth to reduce reverberation during use.
Sonata Vario panels installed to the walls and ceiling at Holy Spirit Primary School in Wigan
www.soundreduction.co.uk/Products/Sound-Absorption-Soluti...
Class A Sonata Aurio acoustic absorbers installed to the walls within the sports hall at Thornton College to reduce reverberation and noise during use
Blue, green/yellow and red colour fleck reflectances in a dark boulder opal and in an opalised sea-shell. This shows typical reflectance spectra for natural opal.
Sonata Aurio panels bonded to the 'dome' ceiling within Malvern St. James School Hall to reduce reverberation during use
Sonata Aurio panels bonded to the 'dome' ceiling within Malvern St. James School Hall to reduce reverberation during use
Nike Air Force 1 Mid 07, Obsidian, Denim, Sail, Gum, Light Brown, 315123-408, Men’s, Size 10.5, Off White, leather and textile upper, padded ankle collar, provides a comfortable fit, VELCRO closure across the ankle adds stability and support, Full-length Phylon midsole with heel Air-Sole unit provides added shock absorption, Rubber outsole supplies durable traction, Basketball, Classic/Retro, Mid-Top, Bruce Kilgore, Release Year 2015, AF1, Uptowns, Basketball, Classic/Retro, Mid-Top
Nike Air Force 1 Mid 07, Obsidian, Denim, Sail, Gum, Light Brown, 315123-408, Men’s, Size 10.5, Off White, leather and textile upper, padded ankle collar, provides a comfortable fit, VELCRO closure across the ankle adds stability and support, Full-length Phylon midsole with heel Air-Sole unit provides added shock absorption, Rubber outsole supplies durable traction, Basketball, Classic/Retro, Mid-Top, Bruce Kilgore, Release Year 2015, AF1, Uptowns, Basketball, Classic/Retro, Mid-Top
Timberland 6 Inch Premium Waterproof Boots, Women’s Size 9, Mint Green, A1BJ9, TBOA1BJ9, Premium leather uppers, Pesto Waterbuck, Comes with two sets of laces green and orange, 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,
My aunt was preparing some boondi (Indian sweet) and I found the process very interesting. I had never seen this process before. To my surprise (and maybe yours too), my uncle added that a very similar process is used to manufacture iron ball bearings!
Timberland 6 Inch Premium Waterproof Boots, Women’s Size 9, Mint Green, A1BJ9, TBOA1BJ9, Premium leather uppers, Pesto Waterbuck, Comes with two sets of laces green and orange, 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,
Class A Sonata Aurio sound absorption panels installed within Manfield Village Hall to reduce reverberation and noise during use
Odor Absorption Experiment - Filled container with 30lbs of cheap (no fuels added) charcoal brickets, broken up with a hammer to increase the surface area. The paper filter at the bottom is for retaining the charcoal, and for exhaust air flow.
Here, it is flipped up, only to show the paper filter at the bottom of the unit for the exhaust porting.
Of limited interest I accept. this timber panelling is slotted to provide acoustic absorption. It means that the huge Grand Arcade shopping mall in Cambridge doesn't sound like a toilet. I think this is Gustafs acoustic panelling, often seen in high end applications like concert halls (Wales Millennium Centre for example).
Features:
1. Good moisture absorption, soft hand feel and comfortable wearing;
2. Wet strength is greater than dry strength, but it is firm and durable on the whole;
3. Good dyeing performance, soft luster and natural beauty;
4. Alkali resistant and high-temperature alkali treatment can be made into mercerized cotton;
5. Poor wrinkle resistance and high shrinkage;
Washing method:
1, alkali resistance and heat resistance, can be used with various detergents, hand washing machine washing, but not suitable for chlorine bleaching;
2, white clothing can be highly alkaline detergent high temperature washing, bleaching effect;
3, do not soak, wash in time;
4, it is appropriate to dry in the shade, avoid insolation, so as not to fade the dark clothes, in the sun drying, the inside outward;
5. Wash separately from other clothes;
6. The soaking time should not be too long to avoid fading;
7. Do not wring out.
Maintenance method:
1, avoid long-term exposure, so as not to reduce the firmness and cause fading yellow;
2, wash cool dry, deep, light color separation;
3. Pay attention to ventilation to avoid dampness and mildew;
4, underwear can not be soaked with hot water, so as not to appear yellow sweat spots.
linen
Features:
1, breathable, have a unique sense of cool, sweat does not stick to the body;
2, rough hand, easy to wrinkle, poor drape;
3, hemp fiber steel hard, poor cohesion;
Washing method:
1. The washing requirements of cotton fabric are basically the same;
2, washing should be softer than cotton fabric, avoid hard scrub, avoid hard brush wash, avoid hard twist.
Maintenance method:
Basically the same as cotton fabric.
(L) Profile of Friona loam, 1 to 3 percent slopes, showing a petrocalcic horizon that has a laminar capped indurated layer over strongly cemented calcium carbonate in the lower part. (R) The cemented pan in the Friona soil negatively affects the water holding capacity of this soil for crop growth and is a major limitation for septic tank absorption fields. (Soil Survey of Deaf Smith County, Texas by Thomas C. Byrd, Natural Resources Conservation Service)
Map Unit Setting
General location: Southern High Plains of western Texas and eastern New Mexico
Major land resource area: 77C
Geomorphic setting: These soils are on very gently sloping plains and occur along Tierra Blanca creek in the southwestern part of the county.
Map Unit Composition
Friona and similar soils: 80 percent
Contrasting soils: 20 percent
Based on transect data and other field observations of the map unit during the survey, the best estimate is that the Friona soil and similar soils make up 80 percent of the map unit, and contrasting soils make up 20 percent. The soils similar to Friona are the Kimberson soils that occur on the same landscape position. Also included in the map unit are small areas of Friona soils with slopes less than 1 percent.
Soil Description
Friona
Landscape: Plateau
Landform: Plain
Parent material: Loamy eolian sediments from the Blackwater Draw Formation of
Pleistocene age.
Typical Profile
Ap—0 to 8 inches; brown, slightly alkaline loam
Bt1—8 to 15 inches; brown, moderately alkaline sandy clay loam
Bt2—15 to 26 inches; yellowish red, moderately alkaline sandy clay loam; slightly effervescent
Btk—26 to 31 inches; yellowish red, moderately alkaline sandy clay loam; about 5 percent films, threads, concretions, and masses of calcium carbonate; strongly effervescent
Bkm—31 to 35 inches; pinkish white petrocalcic, laminar in the upper part
B'tk—35 to 80 inches; pinkish white, moderately alkaline sandy clay loam; about 50 percent masses and concretions of calcium carbonate; violently effervescent
Properties and Qualities
Slope: 1 to 3 percent
Surface features: None specified
Percent of area covered by surface fragments: None specified
Depth to restrictive feature: Petrocalcic, 20 to 35 inches
Slowest permeability class in the soil profile: Moderate above the petrocalcic
Permeability of restrictive feature: Slow
Salinity: Not saline within 40 inches
Sodicity: Not sodic within 40 inches
Available water capacity: About 4.7 inches (Low)
Natural drainage class: Well drained
Runoff: High
Annual flooding: None
Annual ponding: None
Depth to seasonal high water table: Not present within 80 inches
Interpretive Groups
Land capability nonirrigated: 3e
Land capability irrigated: 3e
Ecological site name: Deep Hardland PE 25-36
Ecological site number: R077CY022TX
Typical vegetation: The potential natural plant community for this site is shortgrass dominant with a few midgrasses and forbs. Very few shrubs or woody plants occur on this shortgrass prairie. The most prevalent grasses are blue grama and buffalograss with blue grama being dominant.
Use and Management
Major land uses: These soils are used primarily as rangeland and habitat for wildlife. They are not used extensively as cropland or improved pasture.
Rangeland management: Native plants yield moderate amounts of forage. The depth to a cemented pan, low available water capacity, and high runoff are limitations. The hazard of wind erosion is severe. The main concerns in management are continuous overgrazing, fire suppression and invasion of woody species, and undesirable perennial grasses or annual forbs. Proper stocking rates, brush management, and controlled grazing can help improve or maintain productivity.
Wildlife habitat: The slow percolation is a major limitation that restricts plant growth necessary for good habitat. The potential for wind erosion is severe.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX117/0/...
For a detailed description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/F/FRIONA.html
For acreage and geographic distribution, visit:
A Fomapan Action 400 black-and-white film to test the effect a the special Foca filter "Dyma" produced in France in the 50's.
The filter is called "Dyma" due to the presence of neodymium in the glass giving an unusual absorption by bands in the visible spectrum. In particulier blue and yellow color ans more absorbed than the rest of the spectrum. The filter existed in two different versions with the coefficient x2.5 or 3.5. Here the 42mm push-on Foca Dyma filter used is a x 3.5.
As a consequence, I exposed the Foma 400 for 80 ISO using a Minolta Autometer III with a 10° finder for selective measurements privileging the shadow areas. I used my FOCA camera PF2B year 1956 and its normal Oplar lens1:2.8 f=5cm equipped for all the views with the Dyma filter and a Genaco metal shade hood.
Typical settings during the session : 1/100s f/8 to f/11.
Rue Neyret, May 29, 2023
69001 Lyon
France
After exposure, the film was processed using Adox Adonal (Agfa Rodinal) developer at dilution 1+25, 20°C for 6 min.
The film was then digitalized using a Sony A7 body adapted to a Minolta Auto Bellows III and a Minolta Slide Duplicator using a lens Minolta Bellow Macro Rokkor 50mm f/3.5 at a reproduction ratio of 1:1. The reproduced RAW files obtained were processed in LR prior the the final JPEG editions.
All views of the film are presented in the dedicated album either in the printed framed versions and unframed full-size jpeg.
About the camera and the lens:
The Foca type PF2B (PF for "Petit Format") was constructed in France by the company "Optique & Precision de Levallois" (OPL) starting from 1947. It was manufactured in the Chateaudun OPL factory, route de Jallans, France, in 1956 among a late series of the PF2B. The factory, constructed in 1938, is still at the same place under the name of SAFRAN now producing precision devices for aerospace appliances.
The camera is equipped with the collapsible OPLAR lens (a Tessar formula) 1:2.8 f=5cm. The focal shutter of the PF2B has timing of 1/1000, 1/500, 1/200, 1/100, 1/50 and 1/25s plus the B pose. A slow exposure device below 1/25s could be installed by the aftermarket service and was installed basically for the FOCA PF3 and Foca Universel.
Sonata Vario suspended sound absorption panels installed within the restaurant at Llanerch Vineyard to reduce noise and reverberation during service
The Access technology addresses the problem of poor intestinal absorption by utilizing the body's natural transport system. Cobalamin™ (a vitamin B12 or COBALAMIN analog) is actively transported from the gut to the blood stream by a receptor-mediated process the body normally uses for transport of vitamins.
Timberland 6" Premium Waterproof Boots, Junior Size 7, Light Pink, A62EQ, UPC: 196246577885, 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, reddealsonline, sneaker collection