rfcurry Posted December 8, 2014 Share Posted December 8, 2014 I happened upon the following catalogue that might be of interest to those pursuing fluorescence -- http://www.callingto...alogue-2014.pdf Link to comment
nfoto Posted December 8, 2014 Share Posted December 8, 2014 Interesting. The company is Swedish-based too. Link to comment
colinbm Posted December 9, 2014 Share Posted December 9, 2014 Interesting, but I bet they are expensive.Col Link to comment
colinbm Posted December 9, 2014 Share Posted December 9, 2014 It would be interesting to know what filter glass they use & if it is available to purchase individually ?Col Link to comment
nfoto Posted December 9, 2014 Share Posted December 9, 2014 Why not send them an e-mail? If time permits I could give them a phone call as the distance isn't that great between us and my understanding of Swedish should be sufficient (after all it's my mother tongue although not executed for the last 60 years or so). Or, maybe our Swedish-based member Alex H. is familiar with their product range. Link to comment
rfcurry Posted December 10, 2014 Author Share Posted December 10, 2014 This site has US prices - http://www.crime-scene.com/store/labino.shtml but this site shaves $200 off for the UVG5 - http://www.tedndt.com/cat/cat97.php UK source - http://www.advanced-ndt.co.uk/uv_led_lights_and_torches.htm Link to comment
Damon Posted December 10, 2014 Share Posted December 10, 2014 The piece of woods glass in front of my Blak-Rays is huge. Could probably get a couple filters out of it. I wonder if it would work in front of an LED. Of course you would have to cut the glass down. -D Link to comment
colinbm Posted December 10, 2014 Share Posted December 10, 2014 You don't need to waste a Blak-Ray filter by cutting it down, just make up a stand for it to be held in front of any lamp you want to use.Actually the LED's are cool enough to use any of the UV photography filters in front of them. You only need the big thick Blak-Ray UV filters for high heat absorption.Col Link to comment
Damon Posted December 10, 2014 Share Posted December 10, 2014 Could I use the woods glass in front of my UV camera? -D Link to comment
colinbm Posted December 10, 2014 Share Posted December 10, 2014 You could......but it will pass IR too, which will take over the photo, plus it is not optically flat, so it will have some distortion.Col Link to comment
Damon Posted December 10, 2014 Share Posted December 10, 2014 So I could then have an IR camera per say with some distortion? I am using an unmodified D70 Link to comment
colinbm Posted December 10, 2014 Share Posted December 10, 2014 You would be better off with an IR photography filter, the Chinese ones are just as good as Hoya etc.I don't know how receptive the D70 is to IR.Col Link to comment
enricosavazzi Posted December 10, 2014 Share Posted December 10, 2014 An unmodified D70 is not very sensitive to NIR. I seem to remember I had to use an exposure time of a second to a few seconds in full sunlight, with 720 nm high-pass filter on the lens. Link to comment
Damon Posted December 12, 2014 Share Posted December 12, 2014 Enrico--a few seconds I can deal with. Did the images turn out ok? -D Link to comment
enricosavazzi Posted December 12, 2014 Share Posted December 12, 2014 Yes, images were fine (except for windswept branches). There was a lot of pink/red false color, which is to be expected anyway with this type of filter. After converting the camera to multispectral and using IR-pass filters with longer cutoff wavelengths, images become more monochromatic with less false color. Edit: I have two examples shot with an unconverted D70s on my web site, albeit with 820 nm filters:http://savazzi.net/photography/ir.htm Link to comment
Damon Posted December 16, 2014 Share Posted December 16, 2014 Thanks for the comments and link. I have been wondering about the D70 and IR. -D Link to comment
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