Quote:Canon 17 - 85 EF-S 4.01 @17mm? Ooops wrong way, thats barrel...
Indeed, I also thought of the 17mm side of the 17-85 first ... but that's, as you
gathered, the wrong type of distortion.
Quote:Why don't you photograph a wall with some rectangular structures and create a lens profile?
Well, I want to find out if it's really worth the effort. In PTlens (the tool I use to correct
lens distortions) you cannot create your own profiles anymore ... Tom Nieman
decided to get rid of the textfile based database quite a while ago.
So I want to check the possible quality of the results before I hand in a testimage to Tom.
If I find a valuable candidate for a teleconverter, I will see to get the profile available
in PTlens.
Quote:Samyang 14mm 2.8 should be able to deliver the pincushion distortion.
Nope ... 14's typically produce hefty barreldistortion, or at best mustache ...
but no pure pincushion.
Thank's for your suggestions guys ... seems like the 2.5% that I have now are
about as bad as it gets ...
Rainer