18-135 WR to replace 17-70?

Started Jul 31, 2012 | Discussions thread
PDavis
Regular MemberPosts: 455Gear list
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Re: Hello, TheLastMan!
In reply to Xiaomao, Oct 5, 2012

I have an A57 with Sony 18-135 and I LOVE that focal range.  Love the camera too.  But I was very interested in the WR capabilities of the K30 so I just bought one.

I really like the camera.  Not quite as much as the Sony which has movable LCD, sweep pano, faster fps and better live-view, but the WR trumps all those for me.  I was hoping this was "it".

However, I just can't live with the poor edge sharpness of the 18-135 that came with it.  Not extreme edges, but about 25-30%.  Take a look below at the comparison between the Sony and Pentax 18-135 lenses.  Did I just get a horrible copy or is this typical?  Other than this, I found the Pentax lens was fast enough at AF, nice colors and absolutely superb build quality.

Pentax K-30 with 18-135, f/8 18mm

Sony A57 with 18-135, f/8 18mm

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Olympus OM-D E-M10 Panasonic Lumix G 20mm F1.7 ASPH Olympus M.Zuiko Digital ED 75-300mm 1:4.8-6.7 Olympus M.Zuiko Digital 45mm 1:1.8 Olympus M.Zuiko Digital ED 75mm 1:1.8 +2 more
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