In a message dated 11/10/2007 12:57:08 A.M. Pacific Standard Time, [EMAIL PROTECTED] writes: It really isn't anything to do with the lens, except that using a wide angle lens means you can fit more of a near object into the frame. ============== That makes sense. I admit from drawing I am familiar with most of this. Somehow, though, the perspective distortion I have gotten with the 16-45 has still surprised me.
> Third question is, what causes barrel distortion? The > curvature of the lens > surface? There is a technical explanation of it here: http://www.vanwalree.com/optics/distortion.html I must admit I don't really understand it. I don't know what he means when he talks about introducing a stop in the system. I've always thought it was a problem of mapping a 3D world onto a 2D surface, rather like geographical projections, but I guess I'm wrong. -- Bob ============= Thanks, Bob. :-) I guess next I need to figure out just how a wide angle gets more in the frame. How does a wide angle get more than what could be normally gotten by a normal lens into the frame into the frame? (Boy, I definitely could have phrased that better.) Think I read in my googling that it bends the light somehow. Marnie aka Doe :-) --------------------------------------------- Warning: I am now filtering my email, so you may be censored. ************************************** See what's new at http://www.aol.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
