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Tiffen 1.8 IRND with Hoya IR-Cut


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#1 Anthony Mather

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Posted 06 March 2016 - 06:12 PM

I was considering getting the Tiffen 1.8 IR ND filter to alleviate the need to stack multiple filters to get to my desired stop on day exteriors. I have been using a Hoya IR Cut to great effect on all shots as my camera (Blackmagic Cinema Camera) is quite vulnerable to IR pollution especially when using ND.

 

My question is this, can the Tiffen IRND be used in conjunction with the IR Cut or is this superfluous and counter-productive to image quality? 


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#2 Anthony Mather

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Posted 15 March 2016 - 07:58 PM

Hello? Anyone got an answer to this?


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#3 Satsuki Murashige

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Posted 15 March 2016 - 08:18 PM

Not familiar with the BMCC so I couldn't say. If you currently have lower strength Tiffen IRNDs why not stack a 1.2 and a 0.6 with and without the IR Cut, shoot a test, and see?
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#4 Anthony Mather

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Posted 15 March 2016 - 08:25 PM

Thanks Satsuki, I have stacked and shot 1.2 and 0.6 and it necessitates the use of an IR Cut or I get horrible brown color shift during Day Ext. What I am curious of is if I get the IRND if the IR coating on the ND and the IR Cut will interact and cause image degradation. I don't mind stacking my existing ND's but I wanted to minimize the layers of glass those poor little photons have to navigate on the way to my very IR volatile sensor.


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#5 Satsuki Murashige

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Posted 15 March 2016 - 09:16 PM

Are the filters you are stacking IRND or regular ND? Basically, the Tiffen IRNDs just add green in progressive strengths to compensate for the magenta shift from the IR. So stacking IRND 1.2+ IRND 0.6 should give you same the equivalent color as IRND 1.8, just with less* image degradation.

*Sorry, that should have been 'more' image degradation. Obviously, shooting through one piece of glass will be cleaner than two.
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#6 Satsuki Murashige

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Posted 15 March 2016 - 09:17 PM

I used to use Tiffen IRND 1.8 + Schneider IR750 on the Alexa. Now I just use Mitomo TrueNDs.
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