On 3 Apr 2005 at 19:15, Don Sanderson wrote: > The way I read that it would not be a problem in this case > since I was focusing and shooting wide open. > Any other ideas why the magnified viewfinder image would > be so much better than the final result. > Could my DA 16-45 simply "not get along" with the ist D > sensor when it's wide open? > So many have said what a sharp lens this is wide open, > and my viewfinder agrees, it's quite puzzling.
I really don't think a lenses absolute resolution can be visualized though a finder which incorporates a plastic stamped Fresnel lens and matt imaging surface (which determines the absolute limitation of finder resolution). That said I have noticed that the zoom diopter adjustment in the finder (which is of course on the "other" side of the focus screen) can somehow distort focus if it isn't set carefully. Back to the discussion relating to popular perception. Lots of people have indicated that they feel the the DA 16-45 is sharp wide open but some also said the same about the DA14, FA24 and FA24-90. The later two lenses I have first hand experience with, I've tested them formally and informally and don't particularly care for either, the A24/2.8 beats them both optically at 24mm. Personally I think you should trust your own tests (or other well documented semi-formal test such as Josteins). I learned, I've been bummed in the past by putting too much weight in buying decisions based on other peoples anecdotal lens performance accounts. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
