Andy Perrin Posted December 23, 2020 Share Posted December 23, 2020 UVIVF of some lenses. I wiped them down (dry) with a microfiber before photographing them, but there was still a lot of dust. You have no idea how much dust is on your equipment until you look at the fluorescence. So much dust. The lenses were sitting on a piece of aluminum foil (which does not fluoresce). The procedure, equipment, color profile, and white balance were the same ones I used for the gourd awhile ago. Super-Takumar 50/1.4 - this is a nice lens but it has a natural yellow color (in normal light) from the radioactive thorium in the glass. Here it glows in UV. EL-Nikkor 80/5.6 metal Autocrat 75/3.5 Dinner, chana masala and rice Dinner, reflected visible light Link to comment
Andrea B. Posted December 24, 2020 Share Posted December 24, 2020 Checking our lenses for fluorescence is something we should all do. I was recently surprised by the intensity of the fluorescence on the lettering of one of my 35/3.5s. Guess we should tape over that before using them for UVIVF? Your dinner looks better in the visible version, methinks! Now, about that dust..... Link to comment
Andy Perrin Posted December 24, 2020 Author Share Posted December 24, 2020 If you have any cures for dust, sweep up! I mean speak up! Link to comment
Cadmium Posted December 24, 2020 Share Posted December 24, 2020 More lens fluorescence:https://www.ultravioletphotography.com/content/index.php/topic/2289-lens-glass-fluorescence/page__view__findpost__p__16614 Link to comment
microbat52 Posted December 24, 2020 Share Posted December 24, 2020 You need to use red lentils! Link to comment
Andy Perrin Posted December 24, 2020 Author Share Posted December 24, 2020 Definitely lentils are bright. I spilled lentil soup the other day and my kitchen lit up -- that's how I found all the spots! Link to comment
dabateman Posted December 25, 2020 Share Posted December 25, 2020 Microbat, those look like flagella to me.I wonder if they will be swimming around the kitchen. Link to comment
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