Can Pentax make A Decent Lens? Ricoh have not fixed QC issues...

Started May 18, 2014 | Discussions thread
Shop cameras & lenses ▾
Senior MemberPosts: 2,935Gear list
Mighty Mike made an interesting observation!
In reply to awaldram, May 22, 2014


Mighty Mike made an interesting observation when he posted that the tested DA 50 1.8 was slightly decentered on SLR gear according to their sharpness graphs, resolution is shown across the frame by a graphic representation marked in blur units, what I hadn't noticed was that this shows and decentering very clearly. I've never really seen any comments by the author about lenses centering qualities, obviously he lets the graphs do the talking. Checking through a selection of tested lenses many appear to have slight centering problems.

Here's a link to the Pentax DA 18-135mm test;

Just click on the blur chart to enlarge, from there you have access to focal length and aperture changes.

-- hide signature --

Dave's clichés

 DAVID MANZE's gear list:DAVID MANZE's gear list
Sigma 50-500mm F4.5-6.3 DG OS HSM Pentax K-01 Nikon D7100 Pentax K-3 Nikon D750 +21 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow