Good to know. I had never heard of "micro USM" before. Thanks. ----- Original Message ----- From: Tapani Tarvainen To: [EMAIL PROTECTED] Sent: Sunday, May 30, 2004 12:09 AM Subject: Re: EOS Full-Time Manual focusing on WA lenses
On Sat, May 29, 2004 at 10:16:02PM -0700, Big Mike ([EMAIL PROTECTED]) wrote: > There may be exceptions but I believe all USM lenses are supposed to have > full time manual focus. That is not correct in general: only lenses with so-called "ring USM motor" always have full-time manual focus, whereas those with "micro USM motor" generally don't (the EF 50/1.4 being an exception, it has FTM even though it only has micro-USM motor). In particular most cheap zooms don't have FTM even when they're labeled USM. -- Tapani Tarvainen * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
