Adrian Posted February 26, 2018 Share Posted February 26, 2018 A UV induced fluorescence image of a Hellebore: Helleborus niger. Technical details: Nikon D800 with 105mm micro Nikkor lens. UVF image lit with Convoy S2+ UV torch. Approx 20 seconds @ f/16, 200 ISO. I had a "Dohh" moment during the shoot when I realised I had a "UV Skylight filter" on the lens (Hoya HMC UVc). I shot two images, one with and one without this filter. There was absolutely no difference between the two images. Assuming the filter is there to absorb UV in "normal" photography, I would have expected the one with the filter to be less blue (?). I'm still struggling with the colour of UVF images. Link to comment
ulf Posted February 26, 2018 Share Posted February 26, 2018 The Hoya UV© filter has a cutoff wavelength quite far into UVhttp://www.hoyafilter.com/hoya/products/generalfilters/uvcslimframe/ The only practical function is as a lens protector IMHO. Link to comment
Andrea B. Posted February 26, 2018 Share Posted February 26, 2018 I'm still struggling with the colour of UVF images. Adrian, did you see my review of the UV-Grey Target used for nailing the color of visible fluorescence images?It's in 4 parts.Exp 1: First Look at Target-UV & UV-Grey for UVIVF [see Post 7]Exp 2: Target-UV with Stock Cam, Unfiltered Lens & Unfiltered UV-LEDExp 3: Target-UV with Stock Cam, Filtered Lens & Filtered UV-LEDExp 4: UVIVF White Balance with the UV-Grey Target, Stock Cam/Lens Link to comment
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