Thanks for the feedback. What lens are you using on the camera that has
46mm threads? I don't think the E-M1 would have any metering problems
with a linear polarizer since I believe the phase detect parts of the
sensor are separate from the metering pixels. Also, the phase detect
parts would only be functional when used with a 4/3 lens.
Chuck Norcutt
On 1/9/2015 1:17 AM, Peter Klein wrote:
Thanks everyone!
Chuck, I've been taking walks the last few days to get my strength back
after my hernia surgery. I saw this scene the day before I took it, but
had no camera. I noticed that it looked far better through my polarized
sunglasses than without them. I think this was because the sun was
coming partially at me at a low angle, and the polarizer helped reduce
the glare but keep the "sparkle." Luckily, we had 3 sunny afternoons in
a row, so I was able to bring my camera the next day at about the same
time and get the shot.
I only have linear polarizers, and they work just fine with my E-M5.
It's an old 49mm polarizer I bought for the OM system, fit on the camera
with a 46-49mm step up ring. No hood, I just used my hand to shade the
lens, and then made sure I hadn't cut off a corner.
I know that regular 4/3 lenses work quite well on the E-M1 because I've
tried my two such lenses on a friend's E-M1. I think that the issue with
linear polarizers and DSLRs is not the phase detect autofocus itself,
but the semi-silvered portion of the mirror that lets the metering light
through is in itself a partial polarizer, and the interaction between
the two throws the meter off. I don't know how the phase detect sensors
work, or if they have metering problems of their own.
--Peter
> A neat shot. What was the role of the polarizer... cutting the
reflections from the grass?
>
> Your mention of polarizer reminded me that I don't have polarizers to
fit the 4 new m.Zuikos which use 52 and 58mm filters. So I > bought a
new/old stock 62mm B+W *linear* polarizer for $19 (with free shipping)
and then some step-up rings from 52-55 to use the > Tamron 55mm *linear*
polarizer I used for OM lenses and a 58-62mm ring for the B+W.
>
> We had some discussion here before that linear polarizers should be
perfectly usable on mirrorless cameras. As long as meter
> measurements are coming right off the sensor and focusing is being
done with contrast measurements linear should work just fine. I
> don't know how the E-M1 would work with regular 4/3 lenses because it
somehow does phase detection but I don't plan on using an
> regular 4/3 lenses.
>
> Hoods are going to be problematic with the stepped-up filters but
I'll deal with that problem when it arises. Hoods are a problem > with
polarizers in any case.
>
> Chuck Norcutt
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