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Re: [OM] Glass in the stack--implications for alt lens use

Subject: Re: [OM] Glass in the stack--implications for alt lens use
From: Scott Gomez <sgomez.baja@xxxxxxxxx>
Date: Sun, 15 Jun 2014 17:11:16 -0700
I read both articles. It's interesting information. One of the articles
mentions that more telecentric lenses would be less affected. Perhaps this
was Olympus' reason back when 4/3 first came out for many of the comments
they made about telecentric design in their new lenses as well as for their
recommendation that using OM system Zuikos was generally not recommended.


On Sun, Jun 15, 2014 at 9:08 AM, Chuck Norcutt <
chucknorcutt@xxxxxxxxxxxxxxxx> wrote:

> My thoughts are the same as this guy who responded in the comments:
> ------------------------------------------------------------------------
>  Tim Cooper said:
>
> So the size of the sensor stack can cause high variation in the results
> from a lens, but Canon and Nikon both have wild differences in stack size
> between cameras designed to use the same lenses? I’m not sure what
> conclusion to draw from that, but it’s weird.
> ------------------------------------------------------------------------
>
> I think most of us don't notice this stuff since it requires a very short
> exit pupil distance for anything seriously bad to show up.  That may well
> be the case with RF lenses and especially short focus RF lenses but note
> that the Canon 17/4 has a 90.4mm exit pupil distance... much, much greater
> than the focal length of the lens.
>
> Chuck Norcutt
>
>
>
>
> On 6/15/2014 4:51 AM, Moose wrote:
>
>> On 6/14/2014 7:45 PM, Mike Gordon via olympus wrote:
>>
>>> Something I have never thought about--seems to matter quite a bit for
>>> fast RF lenses.
>>> MFT has quite a thick stack--wonder what that does to some OMZ lens use.
>>>
>>> http://www.lensrentals.com/blog/2014/06/sensor-stack-
>>> thickness-when-does-it-matter
>>>
>>>
>>> http://www.lensrentals.com/blog/2014/06/the-glass-in-the-
>>> path-sensor-stacks-and-adapted-lenses
>>>
>>>
>> Nice to see that Oly and Panny are coordinated in stack thickness, so
>> the lenses are truly interchangeable.
>>
>> As the only non µ4/3 lenses I've seriously considered using are 600 and
>> 1000 mm, it shouldn't be a problem.
>>
>> Might be interesting to see how the deep stack affects 'drawing' for
>> fast lenses for those interested more in lens character than MFT
>> numbers. Finding a lens with some of the soft/detailed character of old
>> LF lenses would be pretty nice. :-)
>>
>> Slow Moose
>>
>>  --
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