Hello John, it is pretty simple to test your lens. Many of us, myself included use the lens extensively without seeing the problem that Charles had. It appears to be his particular sample that has been repaired multiple times.
If you are concerned about using yours, just make a few test shot mimicking the scenario you will be shooting and see if it will be ok. -- Best regards, Bruce Sunday, March 22, 2009, 2:53:50 AM, you wrote: JW> Hi Charles JW> That does look quite unusual, especially for a lens stopped down JW> @ f/5.6. I have to shoot large groups once a year for my employer. JW> the 16-50 would be my choice of lens this year, now I'm having some reservations. JW> Regards, JW> John JW> ________________________________________ JW> From: [email protected] [[email protected]] On Behalf Of JW> Charles Robinson [[email protected]] JW> Sent: 22 March 2009 01:33 JW> To: Pentax-Discuss Mail List JW> Subject: Re: Lens travel kit dilemma JW> On Mar 21, 2009, at 15:27, Paul Stenquist wrote: >> I have almost never seen any evidence of visible CA in DA* 16-50 >> files. On the other hand, many FA lenses seem prone to CA when used >> in digital applications. However, I have to admit that I haven't >> studied FA 35/2 results at a pixel level. JW> Here's my 16-50 from (a couple repairs ago, so maybe I have to try it JW> again now that it's been worked on a few times) from last summer at JW> 100% crop of the upper-right-hand corner. JW> http://charles.robinsontwins.org/photos/2008/imgp2034_crop.jpg JW> Yeah, there's a little bit of CA there! JW> Here's the full shot JW> http://charles.robinsontwins.org/twinsdays/2008/content/IMGP2034_large.html JW> -Charles JW> -- JW> Charles Robinson - [email protected] JW> Minneapolis, MN JW> http://charles.robinsontwins.org JW> -- JW> PDML Pentax-Discuss Mail List JW> [email protected] JW> http://pdml.net/mailman/listinfo/pdml_pdml.net JW> to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. JW> -- JW> PDML Pentax-Discuss Mail List JW> [email protected] JW> http://pdml.net/mailman/listinfo/pdml_pdml.net JW> to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
