Olympus Zuiko Digital ED 7-14mm 1:4.0 Q&As

Announced Sep 27, 2004 •
Wideangle zoom lens | Four Thirds | 261009
Olympus Zuiko Digital ED 7-14mm 1:4.0 Ask a question in forums about the Olympus Zuiko Digital ED 7-14mm 1:4.0.
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Hi. I'm looking for any insights on this puzzle.  I recently bought a second hand zuiko 7-14 f4.  Beautiful to have and to hold. BUT the images through my EM1 are barely useable.  Most of the poor edge definition is resolved by by 14mm.  I'm using a non OEM adapter which works well with the zuiko 12-60. The kicker?  The lens works WONDERFULLY on my E520 at same ISO and aperture. It's everything people celebrate.  Thoughts? Thanks in advance from a puzzled forum newbie.  @7mm  f4  1/60 ISO...
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I'm going towards video more and more. Until now i've used my Oly OMD E-M1 and the LX100. Now i'm willing to move a little forward and use a more appropriate tool for that purpose. I'm considering the GH4 just because its video centric performances (and the V-Log feature) and because it could allow me to use my set of SHGs (7-14,14-35,35-100,150). I know focusing will be the main con, but coming from the E-M1 experience where manual focusing  is mandatory,it does not harm me that much. I'm...
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Take a look at this corner crop, shot stopped down only one stop. Taken at 14mm (where it performs worse than at 7mm, confirmed both by the published MTF charts and my experience):http://fc07.deviantart.net/fs71/f/2012/291/c/2/zd_7_14_corner_crop_by_philosomatographer-d5i73sz.jpg (sorry, but this new forum system is awful IMHO, I'd rather the image open on its own)I am utterly amazed that gargantuan or optically flawed (fisheye-like distortion) lenses (like the Nikkor 14-24, 16-35) get all...
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