Chuck, I believe that would depend on how much correction the lens
has. Overly corrected lenses have that spade-shape coma, but a classic
lens like the Zuiko 50/1.4 will have the ellipses which resembles
commas.
But I'll leave this for the optical experts here on the list. I just
know that some of my lenses are better served stopped down a couple
notches where others are perfectly happy wide open. The 35/2.8 is one
of the happier lenses.
AG
On Tuesday, February 22, 2011, Chuck Norcutt
<chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> I'd have thought that any appreciable coma (obvious in the small scale
> of star images) would have been visible as at least slight distortions
> in the corners pointing back to the center of the field. Am I incorrect?
>
> Chuck Norcutt
>
>
> On 2/22/2011 9:45 AM, Ken Norton wrote:
>> I do agree with Chuck that you cannot tell much from a web image of
>> that size, but the image DOES illustrate the uniformity the 35/2.8 OM
>> Zuiko has. From my own personal experience with this lens, I'd say
>> that the displayed image is representative of my own results.
>>
>> There is coma with this lens, but it is not going to be very visible
>> in that image size. Overall, the lens is a winner and as I've said
>> before, it would be my last Zuiko standing. It, and my 100/2.8 are my
>> dying grasp lenses.
>>
>> AG
>>
>>
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--
Ken Norton
ken@xxxxxxxxxxx
http://www.zone-10.com
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