I know about the film transport problems with many EOS cameras and this is not what I'm talking about. Canon's literature clearly shows an exploded IS mechanism and one of the components is labeled "IRLED" which stands for infrared light emitting diode. It is in the EOS1v, EOS3, or EOS L series lens publication, don't remember which. What I'm really after is someone who has experience using these IS lenses with Kodak IR film, not theoretical disertations. I do appreciate any responses though. While we're on the subject, anyone know which Canon lenses are corrected into the infrared focusing range? Canon's brochures say that any "L" series lens that lacks an infrared focusing correction mark is corrected for IR light transmission. I have a 600mm f/4 EF L lens that doesn't show an IR correction mark, so I'm assuming I won't need to correct the IR focus. Can anyone back me up with field experience? Peace, Rolland - --- "Elliott, Rolland" <[EMAIL PROTECTED]> wrote: > Someone told me that you shouldn't use IS lenses > with infrared film because > the Image Stabilization electronics use infrared > LED's (light emitting > diodes) that cause flare and wierd exposure problems > with IR films. Any > truth to this? IS does not cause any kind of problems with infrared film. IS does not emit any kind of light. What your source might have been refering to is the sprocket counter for film advance. Except for the top cameras (EOS 1n, 1v, etc) and maybe some older ones (620?) this is implemented with an LED. This one can fog (by your source interpreted as flare) the film to a certain degree which depends on the camera model. But then again this does not cause any exposure problem. The exposure problem is probably a problem of the film itself. Parts of the light (IR-part) you cannot see which can cause an exposure problem. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
