Re: Infrared work; No dedicated cameras?

It is still quite possible to produce images from Infra red 'light' in your
digital camera. You can try using a 'nearly black' or 'black' filter,
suggest a Wratten type 87 or 87C.

Exposing manually in bright sunlight, exposures are likely to be 10 seconds
at f16. For best results keep your camera's ISO setting at the lowest ie 100
or 200, high ISO settings with infra red result in very soft images. If
possible set your camera to capture inages in monochrome/black and white
mode. As images taken with coplour enavbled will need to be converted to
monochrome later.

You will need a tripod too, as exposures are never going to be anything less
than 5 seconds or so if you use small F stops to maintain detail.

You need a small F stop to keep focus as Infra red focuses at a slightly
different plane to normal light - if you're lucky enough to have lenses with
infra red focus marks, compose your picture and focus normally, then set the
focus to this mark, you will notice a slight softening of the image. Next
put your 'black' filter back on the lens and make your exposure.

Infra red lighting can be quite variable, so consider using 'bracketing'
maybe 1, 2 5, 10, 15, 20, 30 even 60 second exposures.

The results straight out of the camera will look a bit flat - play around
with curves and contrast in your favourite photo manipulation program, then
you will find really good infra red images screaming out at you!

I have tried this with a Fuji Finepix S2 Pro,
A Nikon D70
A Nikon D70S
An old Nikon D720
and several Sony ZLR designs
Seems to work best with the Fuji sensor, results from various Sony cameras
varied from good to useless.

"Rich" <none@xxxxxxxx> wrote in message
news:kd91k1d772davpd1gq36gpj8uisej2t8nt@xxxxxxxxxx
> Why don't they sell a basic non-filtered monochrome
> CCD camera for this kind of thing, rather than have
> people rely on various colour digitals that work
> only to varying degrees? Even using a monochrome
> CCD security camera illustrates how much better suited
> a "raw" CCD would be for this application.
> -Rich


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