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Lens fluorescence, and my dinner

Fluorescence
7 replies to this topic

#1 Andy Perrin

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Posted 23 December 2020 - 23:51

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.
Attached Image: _DSC8147.jpg

EL-Nikkor 80/5.6 metal
Attached Image: _DSC8149.jpg

Autocrat 75/3.5
Attached Image: _DSC8148.jpg

Dinner, chana masala and rice
Attached Image: _DSC8153.jpg

Dinner, reflected visible light
Attached Image: _DSC8155.jpg

#2 Andrea B.

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Posted 24 December 2020 - 01:53

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? :grin:

Your dinner looks better in the visible version, methinks!

Now, about that dust.....
Andrea G. Blum
Often found hanging out with flowers & bees.

#3 Andy Perrin

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Posted 24 December 2020 - 03:12

If you have any cures for dust, sweep up! I mean speak up!

#4 Cadmium

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Posted 24 December 2020 - 11:01

More lens fluorescence:
https://www.ultravio...dpost__p__16614

#5 microbat52

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Posted 24 December 2020 - 13:31

You need to use red lentils!

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  • Attached Image: IMG_20201224_133001.jpg

Edited by microbat52, 24 December 2020 - 13:32.


#6 Cadmium

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Posted 24 December 2020 - 18:32

Microbat, Very nice! :smile:

#7 Andy Perrin

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Posted 24 December 2020 - 19:46

Definitely lentils are bright. I spilled lentil soup the other day and my kitchen lit up -- that's how I found all the spots! :grin:

#8 dabateman

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Posted 25 December 2020 - 08:33

Microbat, those look like flagella to me.
I wonder if they will be swimming around the kitchen.