08-02-2012, 02:44 PM
[quote name='you2' timestamp='1343911103' post='19669']
Another reviewer noted that the lens performs badly in the corners at infinity but was otherwise fairly sharp. It'll be interesting to see what shows up with the MTF and how it compares to your image. Not clear to me if your tests are effectively at infinity or more middle range. Unfortunately i'm not sure if they meant literally infinity or 'far'.
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For example they make this statement:
"From close to about 50 feet or so, the corners at 12mm are very sharp, even at f/2.8."
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Another reviewer found the lens generally soft but distinctly soft around 25mm.
[/quote]
If the lens isn't ultrasharp at f/5.6 - across the image field - it is a disappointment.
I'm slightly worried about the sample image:
[url="http://photozone.smugmug.com/Reviews/pana1235f28/24490064_qG9vJD#!i=1998675949&k=P9S8bpn"]http://photozone.smugmug.com/Reviews/pana1235f28/24490064_qG9vJD#!i=1998675949&k=P9S8bpn[/url]
If you watch at it at 100% the upper left side is rather softish - more so than on the right side at least.
Another reviewer noted that the lens performs badly in the corners at infinity but was otherwise fairly sharp. It'll be interesting to see what shows up with the MTF and how it compares to your image. Not clear to me if your tests are effectively at infinity or more middle range. Unfortunately i'm not sure if they meant literally infinity or 'far'.
--
For example they make this statement:
"From close to about 50 feet or so, the corners at 12mm are very sharp, even at f/2.8."
--
Another reviewer found the lens generally soft but distinctly soft around 25mm.
[/quote]
If the lens isn't ultrasharp at f/5.6 - across the image field - it is a disappointment.
I'm slightly worried about the sample image:
[url="http://photozone.smugmug.com/Reviews/pana1235f28/24490064_qG9vJD#!i=1998675949&k=P9S8bpn"]http://photozone.smugmug.com/Reviews/pana1235f28/24490064_qG9vJD#!i=1998675949&k=P9S8bpn[/url]
If you watch at it at 100% the upper left side is rather softish - more so than on the right side at least.