M8 users using film, Do I need to take off the ir cut filter??

[baycrest]

For you film users, can you tell me the effect of leaving the ir cut filter on when shooting film?

I can't really notice any the difference from some indoor shots, so maybe the differences so subtle or I'm colour blind....

 

[dof]

In my experience, the differences are subtle but in some circumstances observable. Thus far I'd say that it's similar in scope to comparing two lenses of nearly equal quality - one is not necessarily better than the other, it's just different.

I only shoot black and white film, but notice an occasional lightening of the low values when compared to shooting with a UV-only filter. This can well be useful, but I imagine it takes time and experience to understand which conditions benefit most from band-pass filtering of the UV and IR frequencies.


-J.

 

[jaapv]

On wideangles you must take it off. You will get serious colour shift in the corners otherwise.

 

[GrahamWelland]

I find that with B&W film shooting that leaving the filters on improves sharpness 😎 I presume that the filtering out of the UV/IR from the spectrum reduces any blooming due to focus being slightly different at the various frequencies.

For colour, as Jaap mentioned, you'll get colour vignette pollution with wider lenses. I confess that I haven't tested this but I'd assume the effect would apply on longer lenses with film than with the M8 due to the increased image circle vs M8 crop. i.e. with the M8 you can pretty much ignore filter use 35mm and longer. With film use I'd assume that the effect would apply to longer lenses maybe up to 50mm and wider. No doubt someone can put me straight on this ...

 

[Shin Oyama]

I leave my IR/UV filters on for film. No problems that I can see.

 

[baycrest]

Thanks everybody for the input. Since my post, I have developed some colour with the filter on with my CV15 noticing fairly heavy off colour corners.

Cos its a bit of a hassle, to take the filters on and off, I'll try it with the 24 & 28mm and see what I get...

Thanks again
Rob