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Are IRND filters OK to use with film?

Posted 08/05/2014 - 22:59 Link
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

Edited by Haworth: 08/05/2014 - 23:00
Posted 09/05/2014 - 07:28 Link
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.
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Edited by petrochemist: 09/05/2014 - 07:34
Posted 09/05/2014 - 17:31 Link
Great, thanks for the reply.
'The RAW is the score and the print is the performance' - Apologies to Ansel Adams


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