View allAll Photos Tagged selenium
Yashicaflex S, one of the first Japanese cameras with a built in Sekonic light meter. Heliotar 3,5/80 lens. Selenium cell visible name plate flipped open. 1954
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
Scan of selenium toned print. My photoshop skills just aren't up to my darkroom when it comes to b&w. All my other posts thus far have been scans from negatives/slides but this scan from my print, though 3rd gen, is better than what I've been able to get out of my digital editing.
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Name: Selenium
Symbol: Se
Atomic Number: 34
Standard Atomic Weight: 78.971
Electron Configuration: 2, 8, 18, 6
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Zeiss Ikon Ikoflex 1c
The Ikoflex 1c is very much like a 1b with the exception of course of the (uncoupled) inbuild exposure meter.
Hidden behind a blind (top of image) is a lightcell. Probably a Selenium type but i also read somewhere about a possible CdS cell. Still have to find that out.
Antwerp Central Station late on a Monday evening, so not very busy. This is the central hall, which I find very impressive.
About the image: a 5 exposure HDR generated using Nik HDR Efex, then converted to mono (duotone selenium) using Nik Silver Efex.
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
Marking on an old, unrestored railcar at Illinois Railway Museum
Hasselblad 150mm, lith printed on Fomatone then split toned (carefully!) in selenium
The waterfall at Lassiter Mill Park in Raleigh. Added a Selenium tone to it.
Seen in Explore 10.27.2008
c1963-1966 german made - cast metal, schneider-kreuznach xenar f/2.8 38mm 4-element glass lens, compur shutter, gossen selenium cell meter, collapsible lens 126 film
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
Brazil nut (Bertholletia excelsa), family Lecythidaceae, Castanha-do-Pará. High in selenium. Limit of two per day recommended.
Selenium in sandstone from New Mexico, USA. (SDSMT 3909, South Dakota School of Mines and Technology Museum of Geology, Rapid City, South Dakota, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
Elements are fundamental substances of matter - matter that is composed of the same types of atoms. At present, 118 elements are known (four of them are still unnamed). Of these, 98 occur naturally on Earth (hydrogen to californium). Most of these occur in rocks & minerals, although some occur in very small, trace amounts. Only some elements occur in their native elemental state as minerals.
To find a native element in nature, it must be relatively non-reactive and there must be some concentration process. Metallic, semimetallic (metalloid), and nonmetallic elements are known in their native state.
The rock shown above is from a "roll front deposit", in which native selenium occurs along a redox front in fluvial sandstone (see Granger & Santos, 1982).
Stratigraphy & age of host rock: fluvial sandstone, Westwater Canyon Member, Morrison Formation, Upper Jurassic
Locality; Section 23 Mine, Ambrosia Lake Mining District, north of Grants, New Mexico, USA
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Reference cited:
Granger & Santos (1982) - Geology and ore deposits of the Section 23 Mine, Ambrosia Lake District, New Mexico. United States Geological Survey Open-File Report 82-207. 70 pp.
Taken with a Fujinon-W 135mm lens mounted on a Graflex Pacemaker Speed Graphic. Printed on Fomatone MG Classic and selenium toned.
silver gelatin print
watercolor paper coated with Rollei Black Magic liquid emulsion
sepia & selenium toned
Metrawatt Leica-METER MC.
Rearside of the extracted Selenium module.
As you can see there is also a wire soldered to it here.
Besides the stamps (factory ? Batchnr. ?) also some handwritten ciphers.
9/55, Production date Sept.1955 ? Possible.
10/65, Expiring date Okt.1965 ? How cruel ;-)
The dimensions are :
Width : 36 mm
Height : 10 mm
Thickness : 0,9 mm
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
I bought this a while ago from a car boot. Initially They wanted two quid, at which I walked. A few weeks later they took 50p. However, it looked faulty. Still, came in a cute little zipped leather case!
Forgot all about it until this evening. I took it apart, bent a copper strip that pushes the selenium cell forwards, and hey ... it works! It might need some calibration though, I feel that it underexposes a wee bit, at least against the light meter in my Sony DSLR.
Selenium cell was broken!..
Manufactured by LOMO (Leningrad Optical-Mechanical Union = Ленинградское Oптико-Mеханическое Oбъединение, ЛОМО́), in Leningrad, former USSR.
Voskhod (earlier versions are marked in Cyrillic: Восход) means "sunrise" or "ascent" in Russian; later, export models are marked in Latin lettering
Model: 1966 type 5 (export version)
All Voskhod produced between 1964-68 with quantity of 59.000
There are 5 types and 5 sub-types of the camera
As to Alexander Komarov
35mm film Viewfinder camera
Lens: LOMO T-48 (Triplet) 45mm f/2.8, filter slip-on, serial no. none
Aperture: up to f/22setting: ring and scale on the lens-shutter barrel
Focus range: 1-8m +inf,
Focusing: manual front cell; ring, distance scale with symbols and DOF scale on the lens
Shutter: leaf shutter; speeds: 1-1/250 +B; setting: ring and scale on the lens-shutter barrel
Shutter speeds and aperture numbers are linked together by means of mechanical coupling. When turning the apertures or shutter speeds rings, the other turns too.
They can be turned separately by the pressing the knobs on the lens-shutter barrel
Shutter release: on the front plate, w/ cable release socket
Cocking lever: also winds the film, shark-fine like shape, on the lens-shutter barrel
Frame counter: manual reset, decreasing type, window on the top-plate
Viewfinder: Galileo type bright frame finder w/ parallax correction lines
Exposure meter: coupled built-in Selenium cell meter
Film speed range: 12-26 DIN, 11-250 GOST, setting: by a thumb ring and windows on the bottom plate
Exposure setting: after setting the shutter speed or aperture, check the needle in the viewfinder, it must be on the middle of the lower bright line, if not, turn the aperture-speeds rings to find the correct exposure
Re-wind lever: folding crank, on the top-plate
Re-wind release: on the bottom plate
Flash PC socket: on the front plate
Cold-shoe
Memory dial : small window and thumb lever on the front plate, with Cyrillic characters
Self-timer: none
Back cover: hinged, opens by a latch on the left side of the camera
Engraving on the back cover: Made in USSR
Tripod socket: 3/8"
Strap lugs
Body: metal; Weight: 690g
Serial no. 661919, in the camera, first two letters show the production year
Some very rare early models bear the LOOMP logo.
More info: in Cameras by Alfred Klomp, in Soviecams by Aidas Pikiotas, in Fotoua by Alexander Komarov, in Camerapedia
Don't you love the quality of these old cameras, this one dates from the mid 60s
Type: viewfinder camera
Films: 35mm
Lens: 1:2.8 / 45mm Halinar Anastigmat
Shutter speed: 1/30-1/250 sec.
Aperture: 1:2.8-1:16
Metering: selenium meter, EV-value from exposure meter scale has to be transferred manually by turning the f-stop ring until the EV-value appears in the EV-scale index window on the lens tube
Selenium coupled meter with flash synchronization to 1/1000 sec Fully serviceable, this is actually heavier than my Lynx 5000
IMG_0074
Koden Lightmeter.
Selenium lightmeter produced in Japan. My guess somewhere in the 1950's or 1960's.
Front side view.
Tower Bridge. Abstract.
Nellie Vin ©Photography.
Series Winter in London. UK
Limited Edition 200
Selenium Print
Olympus OM-1n
Olympus 100mm F2.0
Agfa APX100
Rodinal 1-50
Forte PolyWarmtone 11x14
Dektol 1-4
Selenium Toned
Print Scan Epson v700
Vandyke print 21x21cm on Velin Arches ∞
Exposure 9 minutes
water and clearing bath (citric acid about 03% sol.)
fixed in Selenium toner 1+100 2,5 minutes
short wash - EDTA/Sulfite clearing bath 5mins - wash 15 minutes
MT10 Gold toner 4 minutes
Researchers at the Pacific Northwest National Laboratory aimed to make micro- and nanostructures of selenium in a single heat-treatment. Here, a pseudo-colored scanning electron micrograph of multi-phase selenium microstructures is shown as-grown in a single experiment on a fused quartz substrate while under vacuum in a sealed glass vessel.
Terms of Use: Our images are freely and publicly available for use with the credit line, "Courtesy of Pacific Northwest National Laboratory." Please use provided caption information for use in appropriate context.
Looking for a replacement for my favorite Kentmere Kentona. This is Kentmere Finegrain VC FB, toned in selenium.
Selenium Toned Print
Shot for the NZ Professional Photographers competition in the 90's. This shot won the Transport Section and got the inside back cover of the big book of the comp