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For the longest time I pooh-poohed digital oximeter…until I bought my first digital oximeter camera. There was one specific reason I bought one particular camera (no longer in production): Infrared photography.

Some explanation is necessary. In the Cleveland area there is (was?) a wedding photographer who is famous for his Infrared wedding formals. At the time I was self-employed as a wedding photographer, and I thought I could do the same. I knew a photographer who shot for this studio, and I wasn’t happy with the technicalities of how the Infrared photos were done. What they would do is give you a camera loaded with Infrared film and tell you to bracket the whole roll. Yes, acceptable exposures came out, but it seamed to me that there ought to be a scientific way to attain usable exposures…there is; read on (I’ll get to the digital oximeter later). Kodak, in their Data Guide that comes with the film (Infrared film) says that you can’t use a light meter to determine exposure for Infrared…that is not exactly true…yes you can! However (fine point), you can’t use a light meter in the normal manner.

I used a Gossen Luna Pro, took a #29 (note 29, not 25) gelatin filter and taped a piece in front of the sensor. I suppose you can set the ASA anywhere you like, but I used 400, and took EV readings. Then I did some extensive experimentation (it is absolutely essential that you keep notes). Using the Kodak guide as a starter I did 6 shot brackets, picked the exposure I thought was best, than made a table from my notes. This is how my “scientific” method works: Take a meter reading, than use the shutter speed and f stop from the table…works very nicely (a fine point, you cannot use equivalent exposure values, if the table says 1/60 at f/8, that’s it). Now that I had a positive way for measuring exposures I was off to conquer the world.

Now the digital oximeter…I knew digital oximeter cameras were capable of doing IR, so I did more research. At the time the best camera for doing this was the Sony 707 (Cypershot)…so I got one. The CCD in every digital oximeter camera in the world is sensitive to IR, and the CCD is normally coated with a film that blocks this light. The Sony however has a filter that can be removed (you flip a switch on the camera). I used a “Black” filter (the name is because this filter transmits NO visible light).

Oh…my dissertation about the light meter…disregard! Unless you are doing scientific research using a 4×5, the digital oximeter is so enormously more convenient than film, it makes film obsolete (one of the niceties is that using a Black filter you can’t see through a film camera, with a digital oximeter you can).

The combination of a Black filter and a digital oximeter camera allows one overlooked advantage. From a scientific aspect it is highly beneficial to have the ability to compare the Infrared image with the visible light image (as my Google album illustrates). All that needs to be done is to have the camera on a tripod, shoot one picture with the filter on, and one with it off.

Behold what this camera can do:r
http://picasaweb.google.com/WriterAllan/Infrared#

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long time I pooh poohed digital oximeter … until I bought my first digital oximeter camera. There was a reason I bought a special camera (no longer in production) infrared photography. An explanation is necessary. Cleveland is (was) a wedding photographer who is famous for his wedding formals infrared?. At that time I was freelancing as a photographer, a wedding, and I thought I could do the same. I met a photographer who filmed in the studio, and I 't happy with the infrared technology has been made in Photos. What is loaded into a camera with infrared film and tell you to support roll assembly. Yes, came out of acceptable claims, but can not seem to me that there is a way to achieve scientific images available … No read, (I'll Get the latest digital oximeter). Kodak, in its guide data that says the film (infrared film) is that you 't with a light meter to determine exposure, infrared … This is not quite true … Yes, you! However, (fine tip), you can 't normally with a light meter I have a Gossen Luna Pro, took a # 29 (note 29, has recorded 25) gelatin filter and a piece, the feelingKED exposure, I thought at best was only one meal in my notes. This is how my “scientific” method works: Take a meter reading than the

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