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Re: [OM] Iowa Zuikofest redux

Subject: Re: [OM] Iowa Zuikofest redux
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 05 Feb 2012 08:22:15 -0500
Thanks.  That's a wider view than we normally see with your test images. 
  I see that the harbor is right there as well as the mountains.
Not very likely but maybe one day we'll get there.  :-)

Chuck Norcutt


On 2/5/2012 7:13 AM, C.H.Ling wrote:
> Yes, you are right. Looking at the shadow area of both images, they are
> almost the same. I think I was confused by the sunlit area of the 100/2 but
> the edges of 90/2 is visible better.
>
> The air here is not very good but there are still lots of clear days
> especailly in summer :-)
>
> http://www.accura.com.hk/temp/IMG_0098s.jpg
>
> For the 100/2 image I remember the focus was made at 1/4 from the edge to
> balance the center/edge details. I will try to made another test again to
> focus at the center only.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Chuck Norcutt"<chucknorcutt@xxxxxxxxxxxxxxxx>
>
>
>> I don't see much difference at all except that the 100mm shot has some
>> direct sun and therefore more contrast.
>>
>> ps:  This may be the first test shot from your apartment where the air
>> is clear enough that I can see a mountain in the background at upper
>> right.  I never knew it was there.  :-)
>>
>> Chuck Norcutt
>>
>>
>> On 2/4/2012 10:40 PM, C.H.Ling wrote:
>>> I'm a bit relaxed as you say there were focus error, if one can see the
>>> difference with E-1's LCD then the lens is very bad, as the embeded JPEG
>>> is
>>> only 1280x960 pixel.
>>>
>>> Some time ago I did a comparison test on 90/2 and 100/2 with 5D II for
>>> distance object. 100/2 is slightly better at the center but 90/2 is very
>>> even across the field and better than 100/2 at the edges. I don't think
>>> 90/2
>>> will do poorer for close objects.
>>>
>>> 90/2 at F4 no sharpen
>>>
>>> http://www.accura.com.hk/temp/IMG_9566.JPG
>>>
>>> 100/2 at F4 no sharpen
>>>
>>> http://www.accura.com.hk/temp/IMG_9568.JPG
>>>
>>> Actually, I'm rather disappointed on my 100/2, the poor edge performance
>>> make the lens not  good for landscapes.
>>>
>>> BTW, I don't have problem to focus the 85/2, 90/2 and 100/2 with 5D II.
>>>
>>> C.H.Ling
>>>
>
-- 
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