colinbm Posted April 10 Share Posted April 10 Finally, I Have A UVC Camera. I now have a mono converted Sigma fp that can see down to 250nm. First tests with a UV Nikkor 105mm f4.5 lens. Quartz Diffraction Grating. Let me know of a common subject that you would like to see ? Link to comment
Stefano Posted April 10 Share Posted April 10 Nice! If you have the filters to do this, try glass to see if it's black. That should be a good test to see if you are seeing pure UVC. Things like ZWB1, ZWB2, etc. that pass UVA and UVB but not UVC should look black. Link to comment
dabateman Posted April 10 Share Posted April 10 Very cool. Should be more user friendly than my pi HQ camera. I am currently wrestling with adding a shutter button, so I can use it with focus stacking on a automatic rails. Yours you can run around with more easily. Do you have a portable uvc lamp thing? I bought a bunch at $15 each. I think at least 2 have died on me. But can work for flowers in your garden or rocks. Link to comment
colinbm Posted April 10 Author Share Posted April 10 @dabateman Thanks Dave I have some UVC LEDs, from 255nm & higher. I could use them individually OR I could make these into a cluster to focus at a small say 100mm spot ? Also some UVC Mercury tube lights. Surplus Shed has a ELECTRONIC CAMERA LENS, SHUTTER, SENSOR ASSEMBLY, that may be adapted ? https://www.surplusshed.com/pages/item/M3059.html Link to comment
colinbm Posted April 10 Author Share Posted April 10 @Stefano Here is an attempt at a half window glass, showing the blocking of UVB at about 300nm. Link to comment
Stefano Posted April 10 Share Posted April 10 It looks like you are seeing a hint of the 185 nm line, just barely. Link to comment
Doug A Posted April 11 Share Posted April 11 Wow! This is so neat. Can't wait to see what you image with this setup. Be careful. Did you know this particular sensor would do UV-C so well or did you just roll the dice? Thanks for sharing, Doug A Link to comment
colinbm Posted April 11 Author Share Posted April 11 @Doug A Thanks Yes the Sigma fp has the same sensor as a Sony model, they are back illuminated sensors, BSI, & they are good for mono UVC with the CFA removed. I was hoping it would see down to 200nm, but I am happy with 255nm. Yes you need to be careful not to expose yourself to UVC light, it can cause nasty burns to the eyes & skin, & destroys DNA. Polycarbonate face shield & long sleeve & leg clothing. Link to comment
Andy Perrin Posted April 11 Share Posted April 11 Looks good, can't wait for some pictures. Link to comment
photoni Posted April 12 Share Posted April 12 @colinbm I don't know how they say it in your country in Italy they say "a monkey climbed onto my shoulders" yesterday I searched and found a used Leica Monochrom M typ 246 24Mpx for €3K... but I don't have any suitable lenses for it. Link to comment
colinbm Posted April 12 Author Share Posted April 12 @photoni Excellent, 'Lady Luck' . Link to comment
photoni Posted April 12 Share Posted April 12 28 minutes ago, colinbm said: @photoni Excellent, 'Lady Luck' . no luck , I can't give myself too many gifts... I'm thinking of getting a new Petzval (modern copy of an 1860 Dallmeyer 3B - 290 mm f 3 lens) Link to comment
colinbm Posted April 12 Author Share Posted April 12 I should have looked it up.... Unfortunately, too often we see reluctance and inability to make decisions and take responsibility: no one wants to have the “monkey on the shoulder”, meaning, being held liable for a decision taken. This behavior mostly leads to negative business impact. Link to comment
Andrea B. Posted April 12 Share Posted April 12 The saying means something like: I want the camera but I don't want the camera. Unable to decide. The decision is nagging me. Toni - Leica M has a short flange focal distance of 27.80 mm. So with a suitable adaptor, you can probably use many lenses you already have. I have the first Leica M Monochrom, and it can make UV photos without additional internal alteration. I do not know about the second Leica M Monochrom. But may I point out that the Pentax K3 Mark III Monochrome is possibly a less expensive way to go monochrome?? Again, we would need to determine whether the Pentax Mono needs further alteration. Colin - I'm reading your adventures in deep UV with interest. Please photograph anything and everything! Link to comment
lukaszgryglicki Posted May 9 Share Posted May 9 Maybe you want to sell Leica M Mono?? :P Link to comment
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