invisible filters

[kenneth.r.rockwell@xxxxxxxxxxxxxxxx]

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Original Text
>From Willem-Jan Markerink <w.j.markerink@xxxxx>, on 8/23/96 3:52 PM:
To: <kenneth.r.rockwell@xxxxxxxxxxxxxxxx>

On 23 Aug 96 at 8:31, Chris Hulme wrote:

> Thanks for the info, Willem-Jan.  By describing it as 'visually 
> opaque', I was of course referring to the fact that you can't see 
> through it to compose/focus when attached to the camera.  It has 
> often been described like this in UK publications which as you point 
> out, is not technically accurate.

I still wonder how people can call this color black. Take a look 
outside (bright sunlight recommended!) and be amazed about the 
difference between indoors and outdoors. I am pretty sure not all of 
this difference can be contributed to the general difference in 
light; I believe the relative amount of 'red' is much much higher 
outdoors, including IR.
BTW, even Kodak lists #89B as visually opaque. 

(PS Ken/Jim: I love your description 'hominid invisible'....maybe
there is an appropriate latin word for invisible as well....only if
it is as catchy as 'hominid' of course....;-))

As for focusing: I agree that it is not the easiest thing, but
that's where AF cameras shine....they are able to focus even through
87C filters!....but in that case your problem of composition 
remains....:-))
However, with #89B, composition shouldn't be a problem IMHO. 

 
> Perhaps I should stick to describing it from my comments when I 
> bought this filter and looked through it for the first time, "How the 
> bloody 'ell am I going to take photos through this black thing!?"  :)) 

Perhaps I am spoiled by looking through the 88A, but I wouldn't call 
#89B anything more than dark red.


 
--
Bye,

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The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
Non-TTL viewing cameras like point-and-shoots and Leicas and disposables 
and Noblexes and Cannonettes and Mamiya 6s and Rollieflexes and Yashicamats 
take all the fun out of these discussions, but sure make it easy to 
photograph!

ken rockwell, hollywood CA 
kenneth.r.rockwell@xxxxxxx 

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End of INFRARED-PHOTOGRAPHY Digest 41
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