Re: Wired goes infrared! ( Oi! ... Mate!)

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 24 Oct 96 at 16:17, Tom Benedict wrote:

> Speaking of computers and photography (I'm not quite 30, but my first one
> was a TRS-80 Model I with NO possibility of video nuthin') there's an
> experiment I wanted to try.  I've been futzing around with a CCD imager
> on one of our optics benches, and realized it's response goes well up into
> (possibly past) the Kodak HIE range.
> 
> Just for grins I stuck a 150mm 4x5 lens in front of it and took a picture
> of all of us lab rats.  That got me to thinking, though:  I wonder how well
> it would approximate the look and feel of IR films if a visible blocker
> was stuck in front of the lens.  Using this system outdoors to preview
> scenes isn't really likely (it's a 10lb CCD head with a controller, a
> liquid cooling system, and about 50lb of other junk), but I wonder if the
> pictures would show the "shark-eye" effect.

Would you be glad knowing that a $100 device, no larger than a camera 
body, can do the same? 
They are called night vision scopes, and no matter how lousy it will 
be for real night vision use (1st Gen, which isn't even that bad), it will 
show a dazzling similar IR effect, provided you use a #87C filter.
A deep red #89B doesn't do the trick as nice....
I once also took a glimpse through a 2nd Gen NV scope, covered with a 
#87A (or darker) equivalent (the sort mounted on IR search lights): 
even more dazzling....it really took my breath away.

These cheapo NV units are based on a M42 lens mount (a 58mm/f2 lens 
is included), so any kind of filter experiment is easy to do. I just 
cut some #87C stuff and mounted it between a cheap UV filter and the lens.
It has a metal housing, so it bumps around in the outer pocket of my 
PhotoTrekker even while skiing. 
A really cheap and dirty trick to get an IR preview!

(I have a short story how I discovered it on my homepage:
http://www.a1.nl/phomepag/markerink/mainpage.htm
Also some more spec's of this NV unit)

Still wondering if a 3rd Gen unit would provide an even more dazzling 
image....someone access to one?

--
Bye,

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      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 7