From: "Julian Loke" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: 15 stycznia 2001 06:19
Subject: Re: EOS 10s and IR?
> > "Rafal Walas" <[EMAIL PROTECTED]> wrote:
> > EOS Magazine (Sept. 2000) lists cameras which can be used with IR film:
> > Problem-free: EOS 1, 1N, 1NRS, 1V, 10, 600, 620, 650, 700, 750, 850, RT
> > Small-problem (some fogging): EOS 1000, 1000F, 1000N, 1000FN
> > Bigger problem (significant fogging): EOS 100, 5, 50/E, 500/N, 5000, 30,
> > 300, 3000
>
> Hi Rafal,
>
> Do you know what is the source of the "small problem" with IR film
> in the EOS 1000 and 1000N series cameras? As far as I know, they
> have a sprocket film drive. Where does the fogging originate?
Yes I (or rather EOS Magazine) have an answer for you:
"All EOS models have a pressure plate on the inside of the camera that holds
the film flat during exposure. The prssure plate used for EOS 1000 series
models has a rectangular hole in it. This is to accomodate the tiny LEDs
that Quartz Date versions of the cameras use to print data onto the film.
The same plate was used in non-Quartz Date models to keep costs down.
Infrared radiation can pass through thin plastic, such as the back of the
camera. The hole in the metal plate allows this radiation to reach the film,
causing a small rectangular area of fogging in the bottom right hand corner
of the picture. However, you can easily alleviate this problem by:
- taping a piece small square of aluminium foil on the back of the camera
over the position of the hole, IR radiation cannot penetrate metal; or
- composing your photographs carefully so that the small patch of fogging
can be cropped."
So now everything seems to be clear. EOS Magazine is really valuable source
of EOS info.
Try www.eos-magazine.com !
Bye,
Rafal A. Walas
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