On 29 Jul 2002 at 21:47, Bruce Rubenstein wrote: > That was my impression when using the FG grip. There was a greater torque > reaction when the lens was being focused. particularly with lithium AA's in the > grip. This did, however, stop after a few months: the AF motor died. Lesson > learned: If you want long lived, fast AF get a body with a big AF motor that > takes "real" batteries.
I'm not disputing that you had a problem with your MZ-S and I appreciate that the MZ-S might not have the fastest AF on the globe but I'm sure that the AF motor wouldn't be under-powered. I tested the torque required to manually focus all my lenses via the coupling on the mount, most are quite loose and require very little torque, I assume that the AF motor is pretty highly geared too. So unless the lens focus ring is being prevented from turning during AF then I can't see why there would be a problem and then I'd assume that the system would employ some sort of safety clutch? The AA lithium cells have quite low internal resistance and can deliver a higher sustained current than can the internal batteries so the fact that AF works faster when using the grip pack is feasible. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
