i did a little google research and as far as i can tell, uv-c at the shorter end of the `UV` wavelengths is what is going to work best.. Microorganisms...
It's worth mentioning, though, that UV-C is NOT your college dorm blacklight's UV light. Here is a note from an article on UV light safety, lifted from the ...
quite so. i think the blacklights MIGHT kill fungus if you put them under it long enough, i think this explains the very varied levels of success people have...
further reading suggests uvc wont penetrate very far into a lens :/ so i guess its probably not such a good idea after all, considering how dangerous it is. i...
We are currently using UV-B from sunlight or black bulbs to bleach yellowed glass in super-takumar 35/2 and 50/1.4 ... so I guess UV-b may be enough. The...
For those who've been doing the research on UV, have you run across the percentage of each type of UV in normal daylight? Or, maybe some forms, such as type C,...
yes the shorter wavelength = higher frequency, and it does do more damage, but it penetrates a lot less.. uvc from the sun is all filtered by the atmosphere....
Hello All, Just joined today after making a purchase on Ebay. I picked up a Pentax Tak 500mm f4.5. I'm a little curious if anyone has ever used one of these,...
... .....snipped. Go for it! I recently got back into it about 6 months ago and I'm having a ball with it! The "fun factor" with LF is very high. You can get a...
Hi chris that's an impressive list. The 500/4.5 should not disappoint as far as such lenses go. I have heard of a number of people who use this lens as a...
yup. I recently sold my only 4x5 crown graphic for about US$130. In my area, it is too difficult to get 4x5 stuff processed... and I don't have the time nor...
well, i develop my own B&W negs, scan and print digitally. I do about 90% B&W with 4X5 as it looks so awesome. For color, i shoot slide film and mail order the...
Hi Thought I would share this with the group... I did some test-shots last week with my Super-takumar 24/3.5 + hoya IR72 filter mounted on my EOS 10D. I got...
CJZ lenses are all good or better than good.. i never heard anyone complain about one of them in terms of optics. i wouldnt worry about build quality either,...
Hmm... IR on digital? I don't think the CCD is sensitive to IR in the same way as film. Bob ... From: Kelvin To: ClubM42@yahoogroups.com Sent: Thursday, June...
Hi All, Well, my Zorki 4 from kostic-shop arrived today. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2928007011&category=30031&rd=1 The shutter only...
Hi, I've had nothing but light meter problems with my Zenit 122 since I got it about a year ago. When I removed the cover screw to the adjustment screw, I...
pretty much every photographic item ive bought on ebay has been worse than described. last thing was a £50 olympus lens described as `mint` which turned out...
hah i just retried to leave neg feedback and it worked. i dont even care that ill probably get a neg back.. i use a different id for selling - that way i dont...
yep the screw is just a cover for the hole, the adjustment is inside as you discovered. word of warning for people; dont push too hard on the adjustment ...
Hi Keith, With most SLR cameras that would certainly be sound advice, but with a Zenit 11 it is a different story. With most SLR's a $100.00 plus maintenance...
yeah that zenit 11 only cost $10.. so i wasnt exactly that bothered if i killed it trying to fix it or not.. i was more interested in seeing the way it fitted...
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