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Photography F.A.Q (Last Updated: 2024 Nov 26 6:56 am)



Subject: IR Photography Comparison


magnum ( ) posted Thu, 11 April 2002 at 12:51 AM · edited Thu, 28 November 2024 at 12:33 AM

Just thought I would post a series of photographs showing the differences between colour,B&W and IR Photographs using the same subject in each image. The photgraphs were taken using a Coolpix 995 in colour mode, then in B&W mode and then in B&W modes using an Harrison IR 88A filter to produce the IR image. Hope you all enjoy them and find them interesting. Photographs follow this message.


magnum ( ) posted Thu, 11 April 2002 at 12:53 AM

file_4180.jpg

Colour Image


magnum ( ) posted Thu, 11 April 2002 at 12:55 AM

file_4181.jpg

B&W Image


magnum ( ) posted Thu, 11 April 2002 at 1:00 AM

file_4182.jpg

IR Image


Rork1973 ( ) posted Thu, 11 April 2002 at 6:39 AM

file_4183.jpg

Interesting stuff! Hope you don't me adding what it would look like if shot on (kodak) high speed infra red film. Do you have more examples of this perhaps ? Awesome =)


magnum ( ) posted Thu, 11 April 2002 at 7:58 AM

Rork thanks for showing me what the high speed kodak film would produce. I only had the iso on my digital camera set to 100 but it can go as high as 800 ( although digital noise becomes a problem then ); but I wonder if increasing the iso to 400 or 800 on the digital camera would produce results similar to what you have been able to show me? I think I will give it a go as it can't hurt to experiment I guess. I only recieved the filter in the mail today so I have not had time to get out and take more shots as of yet. But when i do I will post them for all to see.


PhrankPower ( ) posted Thu, 11 April 2002 at 10:02 AM

Rork, it seems that you just cranked up the contrast a lot on magnums IR shot to get your result. At least thats what I did that here, and it looked the same. As for magnums pictures, I dont see what the IR shot has over the regular B&W shot. In fact, the IR shot looks dead. No contrast, which is what B&W is all about. I must say, however, that I know nothing about IR photography, or why/how its used. While Ive always found it interesting to look at, Ive never perceived it as an improvement over normal B&W. I know its a big deal in photography, so obviously, Im just not getting something about it. So what am I missing here?


Rork1973 ( ) posted Thu, 11 April 2002 at 11:09 AM

Attached Link: http://www.gorillasites.com/infrared/

file_4184.jpg

Phrank, yeah....but that's basically how high speed IR works if I would have taken that picture. Blue skies become almost black, and leaves and other light areas become sort of white, soft, almost ghost like. Just incase anyone's interested, Kodak high speed IR is 25 ISO and is very, very sensitive and very thin film. You can easily blow a whole roll or tear it apart by rewinding too quickly. You also need the heaviest red filter you can get. So your exposures will be incredibly long. And the worst thing is that it's pretty expensive - over here in Holland I pay around $18 a roll =( Just have a look at the links to see what I mean....it can be really beautiful. ![penrhyn2.5.jpg](http://www.gorillasites.com/infrared/Gallery_Penrhyn/images/penrhyn2.5.jpg)


Rork1973 ( ) posted Thu, 11 April 2002 at 11:09 AM

PS that photo is not mine but from that site.....


SueO ( ) posted Thu, 11 April 2002 at 11:12 AM

Hey Magnum, nice to meet ya. I played with IR filters on my CP990, when I had it, but it had a hotmirror, which made things kinda tough--wicked long exposures, even in bright sun, you know? Did they take the hot mirror out for the 995? Now I have a different digital, and two IR filters, an 091 and an 093. The 093 is opaque whereas the 091 is very dark red. Not sure where the 88a fits in this scheme, but I could go look it up... May I ask how you manipulated the IR image in the computer, if at all? My new digicam does not have a B&W mode, so I shoot IR in color and then "fix it up" in my image editor... Cheers!


Michelle A. ( ) posted Thu, 11 April 2002 at 2:59 PM

Great shot magnum! I do agree that the IR shot fall a bit flat....there must be some sort of trick to it....I don't have an IR filter but have been thinking of getting one, because my digital also has B&W mode, so it would be interesting to see what method you might come up with to improve it....Keep us posted, I'm definitely interested.

I am, therefore I create.......
--- michelleamarante.com


magnum ( ) posted Thu, 11 April 2002 at 11:43 PM

Hi SueO and Michelle A. The hotmirror is still in place in the CP995 and the above IR photograph only used an exposure of 1 second with the camera set with an ISO of 100. I am still learning/playing and discovering what are the best settings to use with the CP995 for IR work; but when I have it figured out i will post more images. The IR image above was only cropped and had a border placed around it. No other post processing was done to the image.


Misha883 ( ) posted Fri, 12 April 2002 at 9:02 AM

Hot mirror?


SueO ( ) posted Fri, 12 April 2002 at 9:18 AM

Misha A hot mirror is a little piece of colored glass that goes in front of the "film" plane, inside the camera, that basically filters out red light. I believe its goal is to improve focus, since all wavelengths focus at slightly different lengths. But if you have a hot mirror which takes out (at least) long red wavelengths, and then you add to the front of your lens a filter which takes out everything but red light, then there is really not much of the spectrum left to expose the film or sensor, (potentially none, actually :-D). So you get long exposures, and all the problems that go with long exposures.


Misha883 ( ) posted Fri, 12 April 2002 at 5:30 PM

Thanks Sue.


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