Infrared film and Canon EOS 7NE

[olwick]

Hi,

I know there's a warning about using high speed infrared film in the Canon EOS Elan 7NE (I think I read it's the film counter or something).

I was wondering though if anyone has tried Efke IR820 in one to see what actually happens. It's not exactly high speed as I've shot it in other cameras at ISO 6 or 25 (820 refers to the nanometer wavelenght that it's sensitive to, not the film speed)

Also is there a way to disable that little IR lamp that's causing the trouble? What would happen?

Thanks,

Mark

 

[dnjl]

To my knowledge, it's not only the frame counter that causes problems (fogging IR film), but also the film pressure plate. Have a look here:
Dead Link Removed

 

[olwick]

That's a fantastic link. Thank you Walter. He stresses that it's only about Kodak HIE which was sensitive at 900nm, vs 820 for the Efke. I think I'll just need to do some experimentation to see how/if the Efke is affected. The article was encouraging though in talking about how bad it is even when the fogging happens (sometimes just along the sprockets).

 

[moki]

My EOS 50e (Elan IIe) never fogged any Rollei IR-400 (that goes to about 820, if I remember correctly). Only very slight darkening right around the sprocket holes, but that could have been a developement error as well.

And no, there is no way to disable the little IR-lamp, as it's the cameras way to count the sprocket holes until the next frame. If you'd put a piece of tape over it, the camera would either respond with some obscure error code or by spooling the whole film at once without ever stopping.

 

[Josh Harmon]

I had this same dilema when I first started shooting IR film. I just opted to using my oldest EOS camera, a 630, because it has a mechanical counter.