Are IRND filters OK to use with film?


Haworth

Link Posted 08/05/2014 - 22:59
Hi, sorry if this is a stupid question or has been asked before, but is there any issue with using IRND filters with film as opposed to ordinary ND filters; ie do they produce any unwanted cast or effects?

I've read they are optimised for digital to block out IR light which affects sensors,and using ordinary ND filters can leave a cast on digital images, but does this create any problem when used vice versa?

As I shoot both film and digi wanted to avoid having to buy both sorts if possible.

Just checking.
'The RAW is the score and the print is the performance' - Apologies to Ansel Adams

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Last Edited by Haworth on 08/05/2014 - 23:00

petrochemist

Link Posted 09/05/2014 - 07:28
IRND filters are just the same as standard ND filters for visual light use. The difference is standard ones have no effect n IR, which limits their usefulness for those shooting in IR.
Unless you have a modified camera the standard ones will almost certainly be fine for both film & digital. A few earlier DSLRs (such as the K100d) have weaker hot mirrors allowing some IR through to the sensor. Even with these I doubt you'd see any issues other than colour cast with standard ND filters.
Many cheaper ND filters do produce a noticeable colour cast which can be corrected for using CWB. It may be that the IRND ones are better in this respect. If there's not too much price premium they might be the better option.
Mike
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Pentax:K5ii, K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, Sony & micro 4/3 cameras with various PK mounts, Zenit E...
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Last Edited by petrochemist on 09/05/2014 - 07:34

Haworth

Link Posted 09/05/2014 - 17:31
Great, thanks for the reply.
'The RAW is the score and the print is the performance' - Apologies to Ansel Adams

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