ins13 Posted August 14, 2019 Share Posted August 14, 2019 comparison with UV flashlight Convoy all photos below without tripod, hands only where I've got this flashlight from?a good person Denis https://invis-light.livejournal.com/ remade this flashlight from underwater lighting.I do not know the details of its modification. I got it for testing. probably the theme about this device without the technical details should be placed in another section, but I don't know.... this device allows to shoot fluorescence with a wide and very wide angle lenses Olympus em1, olympus 11-22mm, iso 1600, f3,4, 1/4-1/5 s 0,2-0,5s 1/20s these pictures are the very first. of course something can be done better when shooting. and need to try use with a tripod. Link to comment
dabateman Posted August 14, 2019 Share Posted August 14, 2019 Very interesting wide field UV flashlight.Can you take a photo of it next to the convoy for size comparison. Also were the exposure settings the same in your first comparison photo with the convoy? Link to comment
ins13 Posted August 14, 2019 Author Share Posted August 14, 2019 yes, interesting The exposures were different in the first comparison photo. 1,3s with Convoy and 1/4s with this flashlight. I took pictures at aperture priorityother settings were: exposure compensation -0,7, iso 1600, 20mm, f3,4 Link to comment
Andy Perrin Posted August 14, 2019 Share Posted August 14, 2019 Wow, that is an amazing light. Link to comment
colinbm Posted August 14, 2019 Share Posted August 14, 2019 ins13, the link you gave, https://invis-light.livejournal.com/ , doesn't have any information about this torch ?Col Link to comment
ins13 Posted August 14, 2019 Author Share Posted August 14, 2019 Andy Perrin,Thank you!) I will tell Denis I like this flashlight too colinbm,I didn't find a description of this torch there too. This is a trial variant. perhaps when it is finalized, there will be some information. i dont know. I'll ask Denis about it Link to comment
Andrea B. Posted August 14, 2019 Share Posted August 14, 2019 Wow, that flashlight is what we call a "whopper" !!I think it would be quite useful for fluorescence work.Although if held too close, it might fry the photographic subject. I sometimes band together my 4 small single-chip UV-Led flashes for larger coverage. Eka, I put a UV Lighting tag on your post so that it will appear in tag searches for UV illumination. Link to comment
ins13 Posted August 14, 2019 Author Share Posted August 14, 2019 Yes, it is very big and heavyAndrea, thank you! I forgot about tags, sorry) Link to comment
dabateman Posted August 14, 2019 Share Posted August 14, 2019 Well I would be interested in a light like that. Those exposure settings are excellent.Let me know if one becomes available. Link to comment
Cadmium Posted August 15, 2019 Share Posted August 15, 2019 Brand?Model?LED Brand/model?Battery type, and number of batteries? Does it have a filter? If so, what filter/thickness?I see it has two buttons? Is one button for UV and the other for white light? If so, then how many LED's does it have for each kind of light, for each button?10 LED's total, or 10 LED's just for UV?What is the peak UV NM for the UV LED's. Many such torches are 390-400nm, sometimes a mix of high UV and low visible violet also.It may be hard to find out the actual NM of the LED's.365nm is best to have. More info needed... :-)Looks good though. Can you include a pic of the front showing the LED's if the front doesn't have a visually blocking filter installed? Link to comment
Cadmium Posted August 15, 2019 Share Posted August 15, 2019 It looks similar to this torch, which has two buttons and 10 'white' LED's, and 4 'UV' LED's, and 4 red LED's.The barrel detail is a little different, enough to say it is not the same torch, but similar.However, your torch may have a different configuration of LED's.I don't see the peak NM of the UV LED's listed. http://www.parentsof...ger-p-7557.html Link to comment
ins13 Posted August 15, 2019 Author Share Posted August 15, 2019 dabateman,OK Cadmium,I don't know the technical features. I'm just testing it. I only know that it is 365 nm and with a filter to block visible light. the type of batteries is the same as the Сonvoy - 4 piecesThis is not a brand torch - this is the test sample, single, the first trial copy in the purchased housing of the visible light torchnow its viability and efficiency is checked Link to comment
Cadmium Posted August 15, 2019 Share Posted August 15, 2019 Eka, Thank you.What do the buttons do? Why does it have two? Link to comment
ins13 Posted August 15, 2019 Author Share Posted August 15, 2019 Steve only one button is working now. what will happen to it afterwards i dont know) how non-working button worked before I don't know, too)) I have total ignorance here if any information from Denis come, I will write everything here Link to comment
Cadmium Posted August 15, 2019 Share Posted August 15, 2019 Sounds like a modified torch.Here is what people will want to know:LED Brand.LED Peak UV (you said already it is 365nm), people will test this.Filter glass brand, type, and thickness. If you can remove the filter, and take a photo of the LED's shown in visible light, and also shown with the LED's turned on, that would be great. Link to comment
ins13 Posted August 15, 2019 Author Share Posted August 15, 2019 Ok, thanks)Steve, I'm afraid to disassemble it, it's not mine yet, I'm just testingthese are just the first tests. Link to comment
dabateman Posted August 15, 2019 Share Posted August 15, 2019 On the DIY projects. I have thought to take the LED board off of a $20 365nm E26/E27 A19 light bulb and connect that to a flashlight housing. But haven't gotten to it yet. Would just need to measure the current and voltage to see what batteries could work. That would produce a similar wide light field as what your friend has done. But I don't know about the intensity. Your quoted exposure settings seem much better than what I would expect from my DIY flashlight. So he must be using stronger LEDs. Link to comment
ins13 Posted August 15, 2019 Author Share Posted August 15, 2019 Denis gave the details "it was light for underwater photography. the link found by Cadmium in post #11 is correct. The carrier LEDs panel and the LEDs were replaced. The second button does not work, because it was for the small "internal" LEDs, in this case red and blue (on the native panel). The heat sink is bad, initial, was not changed, heat flows through the end of the panel on the housing, so long working is not recommended. The LEDs are the similar Nichia, but korean, a power of 80 percent from Nichia precisely. there is no focusing, no lenses, no reflectors. Filter glass - zwb2 2mm thickness" Link to comment
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now