On 08/07/07, P. J. Alling <[EMAIL PROTECTED]> wrote: > I took special note of his highest contrast image, and saw nothing to > justify his conclusion about CA. I've certainly never noticed it my > results.. I do find the barrel distortion to be fairly noticeable at > times, minor though it may be, but when I compare my results to a couple > of guys I know who shoot Canon Zooms pretty much exclusively I feel > pretty good about that lens. Now you may have been disappointed in the > 43mm I'm not, in fact it pretty much replaced my 50mm lenses for most > purposes when I was still shooting film. Then again I don't stitch > images to produce panoramas, but the 43mm probably wouldn't be my lens > of choice for that anyway.
Looking at the sample images I'm not surprised that little CA is visible, most aren't the type of shots that would show it up. Most of the test shots have the subject relatively close in with a wide aperture so the edges (where lateral CA is obviously most visible) are rendered soft as they are out of focus. Generally if there are high contrast elements with well defined edges in the plane of focus then lateral CA is most visible at the edges of the frame. See the left edge of this shot: http://www.photozone.de/8Reviews/lenses/pentax_50200_456/samples/IMGP8730_acr37.jpg Or the bottom left corner of this shot around the windows (edge sharpness is quite is OK in this shot because it's f11): http://www.photozone.de/8Reviews/lenses/pentax_50200_456/samples/IMGP8742_acr37.jpg They pretty much bear out the CA figures quoted in the review (which aren't huge or unusual by any means). I really don't understand what people seem to get bent out of shape about, it's pretty plain that these reviews assess lens performance in combination with the current bodies down to the pixel level. Hopefully everyone appreciates that it's possible to make a great photograph with a Lensbaby but they certainly don't "test" too well. -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://picasaweb.google.com/distudio/PESO http://home.swiftdsl.com.au/~distudio//publications/ Pentax user since 1986, PDMLer since 1998 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
