I bought a box of larger format film, and found that
a) I had no way of working out where to focus (on 35mm I can use the red dot for
IR on the lens). With large format cameras with long lenses, the focussing can
be very critical
b) With a 35mm camera you can shoot off a range of exposures to make sure that
you've got the right exposure for IR. This is less easy with large format,
although I'm sure that with experience you start to know what the correct
exposure will probably be
If anyone has suggestions for ways round this, please let me know (I've still
got quite a few sheets left to use)
- Chris Fox