Hallo and now the good use, the lens is already there. How to get a Wide Angle Zoom Pentax smc-DA 3.5-4.5/15-26 out of the F 3.5-4.5/17-28 Fisheye-Zoom with PTLens
Here a detailled explaination with pictures (sorry, up to now only in German, but you can look at the pictures) http://www.mycroft.de/dptlens.htm An here you can see the result http://forums.dpreview.com/forums/read.asp?forum=1028&message=6639063 Now the links for the installation: Install PTLens from http://epaperpress.com/ptlens/index.html Expand PTLens with the following files: Copy the Lens-Data from http://www.mycroft.de/dptlens.htm into pentax_profile.txt Here are pictures, done with the Fisheye-Zoom on the *ist D with EFIX-Data: http://www.bekkoame.ne.jp/~sight2/photo/lenz/fisheyezoom.html Now, get PTLens and the pictures and test it. regards R�diger

