That doesn't look like motion blur. If it was, highlights would leave trails corresponding to the path of the motion.
As the owner of one of the Pentax soft focus lenses, this blur looks familiar to me. It's a core of sharpness surrounded by a halo of blur, which the soft lenses achieve by having uncorrected spherical aberration. So a cause of the problem could be that the lens is exhibiting spherical aberration because of damage. The same effect can be reproduced if the focus is shifted during exposure, so another cause of the problem could be that the focus motor is not at rest during the exposure. Whatever it is, I don't think it's motion blur. Regards, Anthony Farr > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Jaume Lahuerta > Sent: Tuesday, 7 October 2008 8:20 AM > To: [email protected] > Subject: Have you experenced this double image? > > Hi, > > I some images produced bt my K20D + DA 50-200 I have notices a strange blur, > actually closer to a double image, in some pictures. They are not enough frequent > to send it immediately to a warranty repair, but enough to try to understand its > causes. > > Here you have three 100% crops: > http://tinyurl.com/4mwzkp > or > http://picasaweb.google.es/jlahuer/K20DDoubleImage?authkey=NqXDmYt0yRo > > (For those not familiar with Picasaweb, at the right, under 'more info' you can find > exposure data. The pictures are better viewed in slide show mode). > > They are all below the limits of the 1/focal length rule, but not that much so SR > should be able to compensate it, doesn't it? > > So, have you ever experienced something similar? > Can this be due to SR not working properly? > > Regards, > Jaume > > > -- 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.
