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I recently latched on to a bunch of Kodak series size filters. Most are of the u sual types (K2, G, 85 Etc.), but a few I can find no info on. They are: 8N5 2D CC 6-15-24-33 (with no color code such...

I just recently latched on to a Clean (considereing the age) and fully functiona l 5 by 7 Speed Graphic with a 1931 serial no., with a 1912 serial no. 180mm F/6. 3 Tessar that someone put into a Dial...

Arlington Camera in Arlington, TX has a 203mm F/7.5 Optar on a Crown Graphic for a good price. When I looked at it, (I also have the Ektar), I definatlely saw eight air-glass reflections which...

The Volute shutter was a Bausch and Lomb design with slow speeds to four seconds. It was designed by one half (can't remember the name) of the duo who patented the clockwork gear train mechanism...

The lens you have is a 4 element double-Gauss type lens, like the Wide Field Ektars, Wollensak 90mm F/6.8 Optar, etc, etc.. It's made to cover 4 by 5. I have no info on Leitmeyer except that I have...

The Voigtlander is a Dagor copy. It was patented in July 1895.

You might get some useful info from Dr. Rudolf Kingslake's book "A History of the Photographic Lens". You can get a copy through Barnes and Noble. Also, go to Deja-News and type in large format...

Does anyone know anything of the Wollensak Pro-Raptar lenses? Years made, coverage, sharpness, etc... I just bought a 160mm one for a good deal, will test, but are always interested in what other's...

The Weston Ranger Nine came out early 1966 and was produced for perhaps six years. It has an eighteen degree acceptance angle and a optical viewfinder that deleniates the area measured. It uses two...

The most accurate way to measure focal length is the lifesize method. All lenses, whether telephoto or normal, reproduce a 1:1 copy when ex- tended there exact optical focal length. Depending on your...