Yes, well raod racing is probably predictable enough for manual focusing. Other things may not be. But then again - Pentax AF often isn't fast enough for moving subjects. However - I have seen pretty good results with Sigma AF 170-500mm - perhaps using non Pentax bodies: http://www.treknature.com/gallery/Africa/South_Africa/photo6625.htm The photographer actually complains about haw slow this lens is and would prefer a HSM lens.
When shootingh Ping-Pong players, I too use MF on the FA* 80-200mm: http://www.flickr.com/photos/bladt/268361406/ Still, 500mm is a lot of focal length, especially on an APS size sensor (750mm). Regards Jens Bladt http://www.jensbladt.dk +45 56 63 77 11 +45 23 43 85 77 Skype: jensbladt248 -----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af Godfrey DiGiorgi Sendt: 21. oktober 2006 21:27 Til: Pentax-Discuss Mail List Emne: Re: Somebody talk me out of it On Oct 21, 2006, at 10:23 AM, Jens Bladt wrote: > Talking you out of this is quite easy, I believe. > Long lenses with MF are VERY difficult to use successfully. My experience is exactly the opposite. I generally get much better results with manual focus when shooting with very long lenses, even shooting dynamic subjects. About the best work I've done with autofocus and a long lens was shooting motorcycle roadracing using a Canon 10D and 300/4L IS lens, using the 10D's predictive continuous focus and the IS for hand held work. Most of the time, a much better result has been had by using a tripod, careful setup, and patience. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.408 / Virus Database: 268.13.9/490 - Release Date: 10/20/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.408 / Virus Database: 268.13.9/490 - Release Date: 10/20/2006 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
