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01-02-2019, 11:52 AM   #1
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Filter holder for 4.5" unthreaded drop-in filter

Does anyone know of a filter holder for the round 4.5" drop-in filters that are unthreaded? Like these:
Tiffen 4.5" Round Linear Polarizing Filter 412POL B&H Photo

They're usually used for cinema cameras and matte boxes. I picked some up on eBay for a song. I've been able to use them by just holding them in front of the lens and using microfiber gloves and being careful not to scratch. It's not ideal though and I'm hoping for a holder.

I feel like this could work since they're likely under 4MM thick: LEE Filters Foundation Kit FK B&H Photo Video

I have a Pentax K-1 and an Irix 15MM Firefly with a 95MM thread. Can I just get the foundations kit with a 95MM thread and use step-down rings to use on my other lenses? Or will I need to use a matte box with a 95MM thread.


Last edited by pbone; 01-02-2019 at 12:24 PM. Reason: typo
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