Re: Digital IR

[Luvdove6@xxxxxxx]

Do you know of any place that would have these b&w digital cameras that could 
be manipulated into taking actual IR pictures?  I have a regular old digital 
camera... takes color pictures...  



> > Can someone explain how people take IR photos digitally?
>  
>  Holly,
>  
>  There are various ways of doing this. Most electronic cameras that use CCD
>  sensors or "chips" are sensitive to infrared and manufacturers go to great
>  lengths to eliminate such "unwanted" sensitivity, typically using filters 
> that
>  block the IR from reaching the sensor.
>  
>  Some cameras (especially B&W surveilance cameras - some not CCD equipped 
but
>  still IR sensitive) , however, still exhibit high IR sensitivity and simply
>  placing a light blocking filter (a red 25, 29 or opaque 87, 87C, etc.) is 
> all
>  that is required and if lots of IR is present they provide you with an 
image
>  that can then be "frame grabbed" and inputed to a computer where it is now 
a
>  "digital" image.
>   
>  Another, "usual",ploy is to simply remove the IR barrier filter from in 
> front
>  of the sensor and some people have done this with 
(sometimes)run-of-the-mill 
> 
>  camcorder cameras. This is not often a very easy thing to do. At least one
>  camera line (Sony w/nightshot feature) has this feature built-in and makes 
> the
>  process of imaging IR  rather easy. After taping in IR the images are again
>  frame grabbed and placed in a computer.
>  
>  In a similar fashion, digital cameras often also exhibit at least residual 
> IR
>  sensitivity and some people have taken advantage of this by shooting with 
> the
>  digital cameras through a red or even IR filter and gotten passable 
results.
>  As a result of some controversy about this subject I tried out myself 
making 
> IR
>  digital photos with an Agfa 1280 and the technique did work ... as long as 
> the
>  sun was real bright!
>  
>  Some high end cameras, both 35mm camera size as well as studio size, are
>  supplied with filters that operators place in front or behind the lens of 
> the
>  system to remove IR for accurate color reproduction ... but some 
> photographers
>  have simply not done that and placed a IR transmitting, light blocking, 
> filter
>  in those positions and shot IR digitally directly. This is typically the
>  highest quality IR digital photography available. Also the most expensive.
>  
>  I have been intrigued with making my own digital camera of sorts and 
> recently
>  took the sensor out of a small, inexpensive, hand driven scanner and 
> installed
>  it in the back of a "junk" mechanical SLR camera. I made a cable to 
connect 
> the
>  sensor to the scanner assembly and have been making low-budget 360 degree
>  panoramic IR digital photographs for a few days now. 
>  
>  I don't believe this is a new thing or application or endeavor but it was 
> new
>  for me!
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