View allAll Photos Tagged selenium
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
silver gelatin print
watercolor paper coated with Rollei Black Magic liquid emulsion
sepia & selenium toned
Taken at Photostock 2012, Hasselblad 250mm, Acros, printed on Ilford Warmtone with sepia+selenium toning
Converted in Perfect Effects 17 using my favorite preset: Ansel Adams. It automatically adds a selenium tone and a vignette as well as a particular array of color channel adjustments.
Metrawatt Leica-METER MC.
Here a drawing of the electrical circuitry.
Not 100% accurate because i should have drawn variable current sources instead of the variable voltage sources but i find that the voltage source symbol makes for easier understanding.
Also the connection of the optional Booster Cell is pictured.
The meters Selenium cell has indeed 1 positive pole and 2 negative poles. So when in dark situations a second part of the Cell can be activated by a switch.
Color codes :
BK = Black
BN = Brown
GN = Green
RD = Red
YE = Yellow
Update 01-June-2012 : DC Resistance of the Coil about 2900 Ohm
silver gelatin print
Fabriano Pittura acryllic paper coated with Rollei Black Magic liquid emulsion
sepia & selenium toned
Unfolded Kodak Retina IIIc rangefinder with 50mm Schneider-Kreuznach Xenon f/2 standard lens and original Kodak bayonet mount plastic lens shade. Of course one can no longer fold the lens with the hood on. This is a somewhat fussy camera: one has to return the focus to infinity and press the two buttons on the lens housing in order to fold the lens back into the body. But it's a very neat and well executed construction that still works flawlessly more than 50 years after leaving the factory.
Shot with Alpa 10d and 50mm Kern Macro Switar f/1.8 at f/11, 1 sec on Agfa Vista ISO-200 film. Composite of two frames with Helicon Focus stacking software for increased DOF.
Picked this selenium cell light meter up from eBay for a few quid - with a view to using it with my Mamiya. The cell still seems to work okay, the only problem is I haven't got a clue how to read it... any one any ideas?
Obviously I know to set the ASA of the film in the centre, then the inner ring rotates around - and I guess I have to line something up with the needle... but I don't know what.
UPDATE: I now know the secret! Check out the manual here: www.flickr.com/photos/fwump/3797788562/
(No Photoshop involved. "Traditional" film photography and printing in the dark room)
This is a long exposure (about 12 minutes) using TMax 100 film, a ND filter (8 f/stops down) and a red filter.
This shot was taken with a Mamiya c220, with 55mm lens. Aperture was f/32, to get a maximum depth of field.
I got up early (4:30AM) in the morning to be at the seaside at the appropriate moment (around 7:00AM), when the tide is high and the morning light still delicate.
Development details :
Developed in TMax developer diluted 1+4, 6min15sec at 24°C
Printing details :
Printed on Ilford MGWT FB paper. (shiny surface). Grade used was mostly #5. Developer was Eukobrom.
Toning details :
Toned in a special mixture made of alkaline water, new viradon & selenium to warm the mid-tones to a subtle brown while keeping the shadows dark (thanks to the selenium).
Then wash in a sodium sulfide solution to stop the action of this toner mixture and prevent staining of the paper by the viradon.
Eventually the sky only was slightly toned in a gold toner to add pinkish notes in the highlights (sunrise).
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
'DRP'
This photograph features an amazing DRP (Direct Reduction Plant) tower at the steel factory. If you ask me, it looks like a rocket launch pad - it's approx 90m tall, insanely complex structure with an absolutely awe inspiring, menacing presence. With all mist, steel beams and hundreds of glowing lights, it also makes one incredibly photogenic subject.
Here's the wikipedia link which explains Direct Reduced Iron, the product of DRP tower. en.wikipedia.org/wiki/Direct_reduced_iron
tech: I took this shot at dawn with Canon 5D Mk2 + Canon TS-E 17mm f4.0L lens and Promote Remote Control for 7-stop HDR bracketing. I used Oloneo PhotoEngine Pro to create a tonemapped image and exported it as 16-bpp TIFF file to Photoshop for futher processing.
I had to create a highly detailed, hand-painted mask to isolate the sky from the DRP tower because I wanted to add a bit of motion blur to the clouds which wasn't present in the RAW file. BW conversion was accomplished with Silver Efex Pro with Blue filter and Selenium toning. Final image with a mix of the original, coloured HDR image + BW image with approx 30/70 blending ratio.
Playing around with Silver Effects 2, thought I'd try another variation of this shot.
Selenium is used to intensify and extend the tonal range of black-and-white images.
The honeycomb structure is a dramatic focal point of the building that responds to several significant design and engineering challenges. The pattern was inspired by the fundamental building block of nanotechnology – the intrinsically stable hexagonal carbon structure of graphene.
Taken during Thursday's UWPC meet.
slavich unibrom 160 grade 4 matte, selenium 1+1+9, rollei vintage + old brown, hc-110, neopan ss ei200, voigtlander 90/3.5 apo-lanthar, bessa r.
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
This is my new elegant beautiful classic camera: Canon Demi half-frame 28mm f/2.8 lens (5 elements in 3 groups), match-needle selenium exposure meter which use a behind-the-lens light value program for accurate metering. Dimensions & Weight: 115 x 68 x 37mm 380g. It arrived today and is full working, almost new, lightmeter is working, new light seals with a skylight filter! It is ready to use, I will post soon some pictures.
Kallitype (8x10 inch) from 8x10 film - Plaubel Peco camera- 300mm - Fomapan 100 @64 - Tanol - Hahnemühle platine paper - Fumed silica treatment - Sodium Citrate developer - Citric acid clearing bath - Selenium 1:50 (MT16-Moersch) - ATS fixing.
Selenium cell still works. Came with leather pouch and case. A bit worse for wear with scratches, glad someone used it so often. It is highly evocative of the pre-war era in its design. A little beauty.
Here's a great website specifically for Weston information. I applaud their dedication to these meters: www.westonmeter.org.uk/Chronology.htm
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Walla Walla, WA 2012
Print 2012
Sepia & Selenium Toning 2012
I wanted to play in the darkroom last night but didn't feel like setting up the black plastic I use to darken the room. My solution was to play around with some toning, using both Sepia and Selenium toners to get this effect :)
Beseler 23C II
Ilford Multigrade
Dektol 1+3, 2 minutes
Epson V600
Agfa Optima 200 Sensor ~1969
Agfa Color-Apotar 42mm, 1:2.8 Paratic lens
Auto exposure controlled by a selenium cell, big window on the top left. The system is the needle catch type.
Zone focus on top of the focus ring. Scale focus, in meters and feet in the bottom of the ring.
The advance lever is located under the camera and doubles the function as rewind lever, when the small button, bottom left of the lens is pressed and pushed towards the lens.
Made in Germany.
This camera was a gift from Hugo Cardoso, with a bunch of others.
With some lighter fluid and elbow grease 's back to life.
Thank you Hugo.
Set of photos taken with this camera
I invite you to visit my camera site at Classic Cameras in english.
Convido-os a visitar o minha página Câmaras & Cia. em português
Yashica Minister III ~1966
Yashinon f = 45mm, 1:2,8
Citizen shutter 1 - 1/500 and B
Coupled rangefinder
Uncoupled Selenium light meter
35mm
Here are some photos taken with this camera.
Yashica-E
Japanese Medium Format (6x6) TLR with an Auto-exposure shutter.
Exposure System. Trapped Needle, Phase 1.
Here you see that part of the exposure system which translates the electrical current coming from the Selenium Cell into the mechanical position used for the Diaphragma opening.
The electric current flowing from the Selenium Cell passes through the Lightmeter Coil.
The Lightmeter has 2 Needles, one visible through the meters windows (see 1) and one used for the exposure system (see 2).
Now, during the depression movement of the Release Button 2 Plates are moved towards the Lightmeter in de direction of the green arrow. The Bottom Plate (see 4) which has a flat front surface and the Upper Plate (see 5) which has a curved and stepped front surface (see 6).
The bottom Plate (4) reaches the Needle (2) first. Its flat front surface "traps" the Needle against an Anvil (see 3).
The arrow (see 7) shows were the Needle got trapped in this instance.
This is the first Phase.
.
.
WARNING :
This image is intended as a guide for the more experienced camera service man. If you have no experience in camera repair please do yourself a favor and send your camera to a professional service shop. It would be a pity to lose a vintage camera in a failed repair attempt.
We recently found a Rollei 35 LED so I thought it would be interesting to photograph all of our Rollei 35 cameras side by side so you could see the minor variations in them. All three of these work great although we can't use the light meter in the LED model. They're all are all made in Singapore. Two have Rollei Triotar lenses and one has a Carl Zeiss Triotar lens but the image quality looks nearly identical to me,
Also, can anyone tell me why these cameras fire the flash when you advance the film? I thought our first one had bad wiring but all three of them do it.
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
Selenium coupled meter with flash synchronization to 1/1000 . sec. What I love about the Lynx cameras is no Light Value system, and no automation. Nothing to get between you and the camera.
IMG_0073
Photograph scanned from an original hand-printed, selenium-toned print made with Ilford MG FB Classic paper.
Direct descendent of the Sekonic meter series. Complex dial configuration. Brockway name applied during transition from one company to another. Meter was made in USA, rear plate indicates New England.
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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