Re: [APML] OT: infrared imaging

[Radu Corlan <rcorlan@pcnet.ro>]

On Tue, 29 Apr 2003, Michael Stecker wrote:

> Hello Group:
> 
> Can anyone recommend a current digital camera (preferably point and shoot)
> that will work well for both infrared and visible light imaging?  I am
> interested in a digital camera  that will give similar imaging to that of a
> film camera with Kodak's High Speed Black and White Infrared film with a
> deep red filter.  I am currently interested in the Nikon Coolpix 4500
> because of its good macro features, 4-times zoom lens and 4 megapixel chip.
> However, I can't seem to find any information relative to the spectral
> response of its CCD, IR cut filter, compensation for infrared focusing or
> whether it is suited for infrared work.  Is their anyone in the APML or are
> there any web sites or discussion groups that give this information or can
> help me in choosing a suitable camera?

Michael,

All the cameras that have color sensors have IR-cut filters. Many will 
respond at 650nm, but i doubt you will have one going below 700. IR 
completely destroys color balance, so they can't use it.

Sony is paying some tricks with it's camcorders/cameras for the 'night 
shot' mode which uses IR illumination; They may remove the IR filter or 
rely on the residual NIR response and bin heavily to increase sensitivity 
- i don;t think you get the full camera resolution/sensitivity that way.

Anyway, any color camera that does not have a special mode will have an 
IR-cut filter - there's no doubt about that.

Radu

> 
> Thanks.
> 
> 
> 
> Michael Stecker
> mstecker@dslextreme.com
> 
> My Web Site:
> http://www.homestead.com/mstecker/index.html (INDEX)
> http://www.homestead.com/mstecker/astrogallery.html (Astroimage Index)
> http://www.homestead.com/mstecker/placesindex.html (Places Index)
> 
> 
> 
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-- 

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-------------
Radu Corlan       Snail Mail: Bucuresti sect. 1, 
rcorlan@pcnet.ro  str. Argentina nr. 28, Romania

   You can still escape the "Gates" of Hell!   
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