This is undesireable for DA lenses. Why? Because you really dont want your lenses to create image circles way larger than your format on a fixed format ( no swings, tilts, or shifts ) camera. The reason is bright objects outside the recorded field of view bounce around inside the camera and can create or add unwanted image flare as a result. Its better to have the image circles just large enough for the job ( some margin for shake reduction) but not way larger than needed.
JC O'Connell (mailto:[email protected]) "Honesty is the first chapter in the book of wisdom" - Thomas Jefferson -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Joseph McAllister Sent: Wednesday, April 29, 2009 6:09 PM To: Pentax-Discuss Mail List Subject: Re: image circle of DA lenses: how much smaller than FF? Slapping some of my DA lenses on an LX I have not found any that didn't cover the entire screen, with no apparent vignetting except at a zoom's widest angles. Not scientific. Not all inclusive. Just an observation. If I had the time, and I cared, I'd shoot a few rolls of film to test each of my DA lenses. But I don't, so I won't. Maybe some other time. On Apr 29, 2009, at 14:54 , Luiz Felipe wrote: > Guess they could sue me if I end up finding some DA lens CAPABLE of > marginal (but acceptable to some extent by me) 35mm coverage... > > If I sell someone a PC that is not intended to video edition, has no > real video capability but the user stubbornly uses it to edit video, > I'm ok with that. > > Let's accept the truth, handed from wherever by any means, that > Pentax offers no DA lens intended and guaranteed to work 35mm. My > question still remains: is there any experience proving lousy 35mm > coverage by said DA lenses? Since it's not the accepted use, I won't > hold sacred Pentax responsible for my results... they will be my > entire responsibility. All mine. Joseph McAllister [email protected] "If I could tell the story in words, I wouldn't need to lug a camera." -Lewis Hine -- 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. -- 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.
