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Circular vs Linear Polarizer on m4/3 Camera

Started Jun 7, 2016 | Discussions thread
OP Charley123 Senior Member • Posts: 1,166
Re: Circular vs Linear Polarizer on m4/3 Camera exept EM1 ?

drj3 wrote:

olyham wrote:

hutu wrote:

PDAF requires CPL. CDAF works with both.

Good point All of us with EM1's need CPL as we have both PDAF and CDAF, on this basis the answer that Mirrorless can use either is incorrect. Or does it make no difference to an on sensor PDAF, I would have thought not but maybe there is an expert out there who can confirm or deny this so we can be exact ?

I thought the reason for circular polarizers for SLRs/DSLRs was the use of beam splitters and not fully reflective mirrors. Since the E-M1 does not have either, why would it need a circular polarizer?

It is probably not relevant (even though you would have less light loss with a linear polarizer), since I have not seen a high quality multicoated linear polarizer.

Heliopan makes high quality double coated linear polarizers. Hoya makes good linear polarizers, but they're uncoated. Add a lens hood and you're good to go.

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