Re: IR and camera choice

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

On 18 Jul 97 at 10:57, Mr645@xxxxxxx wrote:

> The only concerns I have heard about regarding IR film in modern 35mm cameras
> is is late model EOS cameras.  The EOS Rebel, Elan, A2 (& all variants of
> these models) all have infrared sensors to determine the film position for
> film advance and loading.   Both Kodak and Canon recommend against using
> these cameras for IR shooting.

The Contax G1/G2 also use a IR-LED film counter.
I also believe that the first model EOS Rebel uses a mechanical
sprocket....the Elan I was the first in the EOS line to have this
silent IR-LED counter, after which the Rebel II with IR-LED was launched.
EOS-1(n), 10 and 600 series are safe.
Beyond that, there are some cameras fitted with a pressure plate 
similar to those used in the databack version, ie with a square 
cut-out. Minolta xi/si is notorious for this, I believe you can have 
this changed. Otherwise one could tape it with 120 backing paper.
A general problem are dimpled pressure plates....not all are bad, but 
many are....Pentax K1000 and Olympus cameras are examples.

Btw, I just received my second Mamiya RB 70mm back; the previous 
owner said he had used it with IR a few times, and oddly enough he 
had 120 backing paper taped to the pressure plate (also tape on the 
door hinge, but that seems overly precautious....there is no way 
light can enter there).

 

- -- 
Bye,

Willem-Jan Markerink


      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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End of Infrared-Digest V0 #143
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