The semi-silvered mirror of the OM-2s and later also require circular
polarizers when metering with the mirror down. The problem goes away if
you're in auto mode and the meter is reading after the mirror goes up.
Chuck Norcutt
Don Shedrick wrote:
> I have a very good quality Hoya 62 mm linear polarizer from my Tamron
> that I would like to use with a step down ring to 58 mm. A few bucks
> for the ring is much cheaper than the huge ransome they want these
> days for a high quality multi coated circular polarizer. It is the
> beam splitter mirrors, from what I have read, that cause problems
> with the linear polarizers, and I do not know it the E-500 uses them.
> It can effect both auto focus and metering. I do not have my E-500
> yet, but when I get it later this week, I intend to try it with the
> linear polarizer. I'll report on the results.
>
> --- Chuck Norcutt <chucknorcutt@xxxxxxxxxxx> wrote:
>
>
>>I assumed that the notion of reusing the OM polarizers was implying
>>49
>>and 55mm filters. Since the only thing they're likely to fit is
>>manual
>>focus Zuikos I assumed we could discard any notion of linear
>>polarizers
>>as being a problem with autofocus. Metering might be a different
>>story
>>but I has assumed autofocus was out of the equation.
>>
>>Chuck Norcutt
>>
>>usher99@xxxxxxx wrote:
>>
>>
>>>Hi, We had a thread on polarizer and OM 2s a month or two ago---I
>>>can't locate it. It may be when the Archives hiccupped. Checked
>>
>>the
>>
>>>Oly web site: the E- 500 uses a "TTL phase detection system" for
>>
>>AF.
>>
>>>One would predict trouble with a large amount of polarization
>>
>>with a
>>
>>>linear pol with this type of AF. I had read a brief artcle that
>>>certain "high end" D SLR's use alternative AF techniques (?IR
>>
>>based)
>>
>>>and are not affected. The D200 uses the same technique. The
>>>Edisonian approach is still interesting. Let us know. Most of
>>
>>the
>>
>>>fancy shmancy thin MC flavored pols are circular anyway. Mike
>>>
>>
>
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