Comments on: Cheap infrared photography http://alone-in-the-light.zenvoid.org/2011/07/cheap-infrared-photography.html Free software, open source, copyleft, technology, art, knowledge. Freedom. Wed, 21 Dec 2011 10:42:20 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Roberto http://alone-in-the-light.zenvoid.org/2011/07/cheap-infrared-photography.html/comment-page-1#comment-112 Roberto Thu, 28 Jul 2011 17:46:30 +0000 http://alone-in-the-light.zenvoid.org/?p=23#comment-112 I'm afraid my mind is very far from being great, it just has an obscure perversion that makes it enjoy itself when fooling other minds to let them think how great is it :P About the glue in your newer camera... I had to use acetone and pliers too, but it was not very difficult so probably they have changed the kind of glue or put it in the inner side of the thread. Once again, manufacturers trying to limit what can people do, very sad. I’m afraid my mind is very far from being great, it just has an obscure perversion that makes it enjoy itself when fooling other minds to let them think how great is it :P

About the glue in your newer camera… I had to use acetone and pliers too, but it was not very difficult so probably they have changed the kind of glue or put it in the inner side of the thread. Once again, manufacturers trying to limit what can people do, very sad.

]]> By: Dr. Zen http://alone-in-the-light.zenvoid.org/2011/07/cheap-infrared-photography.html/comment-page-1#comment-111 Dr. Zen Thu, 28 Jul 2011 16:49:19 +0000 http://alone-in-the-light.zenvoid.org/?p=23#comment-111 Just wanted to add here, that this modification might not be possible anymore. My original IR modified #11 died, and the replacement I received now has the lens assembly glued in with some kind of super industrial adhesive. I tried acetone, needlenose pliers... nothing worked. The lens assembly cannot be unscrewed to access the IR block glass. Just wanted to add here, that this modification might not be possible anymore.

My original IR modified #11 died, and the replacement I received now has the lens assembly glued in with some kind of super industrial adhesive. I tried acetone, needlenose pliers… nothing worked. The lens assembly cannot be unscrewed to access the IR block glass.

]]> By: Dr. Zen http://alone-in-the-light.zenvoid.org/2011/07/cheap-infrared-photography.html/comment-page-1#comment-110 Dr. Zen Wed, 27 Jul 2011 02:30:22 +0000 http://alone-in-the-light.zenvoid.org/?p=23#comment-110 Thanks for the response. Great minds think alike :) I considered the gel filters too, but after reading that they are very delicate and susceptible to humidity and dust, I chose optical glass instead. Thanks for the response. Great minds think alike :) I considered the gel filters too, but after reading that they are very delicate and susceptible to humidity and dust, I chose optical glass instead.

]]> By: Roberto http://alone-in-the-light.zenvoid.org/2011/07/cheap-infrared-photography.html/comment-page-1#comment-109 Roberto Tue, 26 Jul 2011 21:23:35 +0000 http://alone-in-the-light.zenvoid.org/?p=23#comment-109 It is a 760 nm filter, thanks for your feedback about the 850 nm, I think I'll get one of them. The amount of red passing through the 760 nm is too high. About the question, you guessed it, I'm just holding the filter :) It may be possible to build, by several methods, a handmade filter easy to cut to the right size. I remember I've read somewhere about stacking gel filters, or taking a virgin negative film used in traditional analog photography and develop it (so it will become black and block all visible light). I was considering those options for a while, but finally took the easy path. I don't know how well they will work. I guess it will be near to impossible to get the desired wavelength with them, though. It is a 760 nm filter, thanks for your feedback about the 850 nm, I think I’ll get one of them. The amount of red passing through the 760 nm is too high.

About the question, you guessed it, I’m just holding the filter :)

It may be possible to build, by several methods, a handmade filter easy to cut to the right size. I remember I’ve read somewhere about stacking gel filters, or taking a virgin negative film used in traditional analog photography and develop it (so it will become black and block all visible light). I was considering those options for a while, but finally took the easy path. I don’t know how well they will work. I guess it will be near to impossible to get the desired wavelength with them, though.

]]> By: Dr. Zen http://alone-in-the-light.zenvoid.org/2011/07/cheap-infrared-photography.html/comment-page-1#comment-108 Dr. Zen Tue, 26 Jul 2011 15:20:46 +0000 http://alone-in-the-light.zenvoid.org/?p=23#comment-108 Nicely documented! Here via your post on rcgroups. I've similarly modified my #11 as well, and shot using an IR-pass filter just as you have. I'm using an inexpensive (but good) filter I found on amazon.com, a Zykkor 850 nm IR filter. I'm guessing you're using a lower wavelength filter (720 nm?) than mine, because my videos are a blue color - no reds at all. I thought 850 nm would be the most versatile filter for this camera, and it appears to be the case. A question: Do you know if it is possible at all to grind down a replacement disc of the IR filter so it can fit inside the camera lens assembly? Are you just manually shooting holding the filter by hand in front? Nicely documented! Here via your post on rcgroups.

I’ve similarly modified my #11 as well, and shot using an IR-pass filter just as you have. I’m using an inexpensive (but good) filter I found on amazon.com, a Zykkor 850 nm IR filter. I’m guessing you’re using a lower wavelength filter (720 nm?) than mine, because my videos are a blue color – no reds at all. I thought 850 nm would be the most versatile filter for this camera, and it appears to be the case.

A question: Do you know if it is possible at all to grind down a replacement disc of the IR filter so it can fit inside the camera lens assembly? Are you just manually shooting holding the filter by hand in front?

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