Alex, > I had a semi-related problem with my Sigma 28/1.8 II > Aspherical. I didn't > use the lens for a month or two, and when I used it > again, the autofocus > refused to operate. It worked fine in manual focus, but > it was jammed in > AF. Figuring it might need loosening, I switched it to > manual focus and > worked the focus ring quickly back and forth about 100 > times, then tried the > AF again. Sure enough, working the focus ring loosened > up the mechanism and > the autofocus worked after that. Not a big deal, but it > was kind of scary > since I like that lens...
Sounds like my problem. As the 2.8/70-200 Sigma has full time manual focus, even if AF is switched on, there was no problem to override the non-functioning AF by twisting the MF ring. And I found out, that when I twisted the ring to infinity or to the closest focus, the AF started to work again. Don�t know what caused this effect. BTW, the MF ring was running absolutely smooth, while the zoom ring was almost impossible to turn around... Regards, Marco ------------------------------------------------- Marco Kost Journalist - Bild und Text Otto-Mair-Ring 5 83607 Holzkirchen Tel.: 08024 / 47 41 55 Mobil: 0179 / 118 9113 Website: www.mountains-and-more.de Email: [EMAIL PROTECTED] ------------------------------------------------- * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
