Thanks Brian. Regards, Paul
On 15/01/2007, at 8:41 PM, Brian Dunn wrote: > > My particular 16-45 is quite a bit sharper than the 18-55 at 28mm, > and they > are comparable in sharpness at 50mm. The 16-45 has noticably > better contrast > at either focal length. > > The 16-45 also has comparable sharpness and better contrast than an > M 28 f2.8 > prime which I have here. > > The 16-45 seems to have comparable contrast and not as much > resolution as my A > 50 f1.7 prime. > > I tested these by making paper print outs with a row of digits in > 72 point > font, followed by another row in 48 point, 36 ... and all the way > down to 6 > point. These are placed across the room and photographed with the > camera at > 180th and aperture 5.6, on a tripod with self timer mirror release, > plus > flash. Several shots are taken with manual focus to be sure that > the focus > is correct. I also made it a point to zoom in, focus, then zoom > out to the > final focal length before tripping the shutter. You can look at > each line of > numbers and see where they get unreadable. > > > Brian > > > -- > > Brian Dunn Photographic > http://www.bdphotographic.com > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
