Re: IR and 4x5 Film Holders

[George L Smyth <GLSmyth@xxxxxxx>]

Mark Greenberg wrote:
> 
> I am looking forward to shooting HIE in 4x5, however I have heard that 4x5 film
> holders (especially older ones) are more susceptible to IR.   Has anyone had any problems with
> this?

Without question, some do have a problem.  Look at the tab you hold to draw the
slide out of the holder.  If it has a series of five raised dots (not seven)
then the slide is IR opaque.  If not, you will just have to take your chances. 
This is what those five raised dots mean.

george

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