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Showing results for tags 'ultraviolet'.
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Contrary to popular belief, Rollei Infrared film has an extended sensitivity from infrared ... to deep ultraviolet It is basically Full Spectrum Rollei recommends using "at least" a light red filter 590 nm, or dark red or infrared 720 nm Looking at the sensitivity curve, you can see that it is sensitive up to 400 nm, I tried to go further. 1 - photo with deep UV filter -350 > 400 nm 2 - photo with orthochromatic film emulation filter 350 > 510 nm 3 - light green filter 4 - light red filter (A25) 390 nm 5 - dark red filter 670 nm 6 - IR filter (Hoya R72) 720 nm I used an old 6x6 Agfa Isola II camera, which has a simple lens, a triplet, without anti-reflection coating, to be able to "see" also in the UV spectrum Modern lenses with multiple lenses, or glued groups, with anti-reflection coating, stop the frequency at about 400 nm. As I wrote in my first post (Monochrome Full Spectrum - UV - VIS - IR) , I would like to have a modified M246 F.S. to do this test. Thanks Toni .
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Has anyone modified their Leica Monochrom to full spectrum ? To use filters for ultraviolet or infrared (or normal) vision Thanks Toni https://www.ultravioletphotography.com/content/index.php?/profile/141-photoni/ www.flickr.com/photos/stenopeic/53930274293/ Sony A7 Full spectrum UP - infrared with Hoya R72 - 720 nm Down - Ultraviolet ~ 350 nm
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