Moose
Maybe I was unclear. My observation was based on testing with and
without IS on a tripod. A/B comparison of the same shot and setup.
Jim
On 11/13/2012 12:38 AM, Moose wrote:
> On 11/11/2012 12:34 AM, Jim Couch wrote:
>> On 11/10/2012 4:36 PM, Moose wrote:
>>> Lots of fine detail in sharp focus in the center. I don't see anything I
>>> would think is motion blur
>>>
>>> By sheer happenstance, one petal extending to the edge and almost the
>>> corner remained close to the focal plane. It isn't
>>> quite as sharp as the center, but impossible to tell how much of that's due
>>> to lens and how much to DOF. That's what
>>> flat test charts are for.
>> This is what I noticed in my testing, that the center is sharp, it is
>> the edges and corners that seem to suffer when IS is on. Again this is
>> in the E series bodies, YMMV.
> The only way to tell is with a flat test subject for the full frame, and
> shots with IS on and off.
>
> You are going to get that effect with almost any lens, at least at wider
> apertures, from optical aberrations away from
> the center and/or curvature of field, so attributing it to IS without testing
> is questionable.
>
> I. S. Moose
>
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