On 22 Jun 2005 at 18:55, Don Sanderson wrote: > Actually I just tried it and it focused quite well. > It seems that f/2.8 is what the accepted minimum is > for the 1.7x and yet Pentax has the A35-105/3.5 on > their "approved" list for the 1.7x. > I've found that f/4.0 lenses work fine as long as > their contrast is good and the lighting is adequate. > You're right about the tripod though, that's 510mm > on film and 765mm (equiv) on the D! > I did manage a few acceptable shots at f/4 but the > sharpness is pretty poor.
It will work with slower lenses in good light it's just that focus may not be precise or out of the feedback loop range due to the wide open DOF. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
