Thanks, that's what I thought. I think I'll just go take a card full of shots and then see if it needs a trip to the Pentax doctor. I have really only used it in the 16-24 range so far, I was pretty surprised when it didn't do all that well at longer FLs. Maybe it's just a learning curve thing.
Don > -----Original Message----- > From: Rob Studdert [mailto:[EMAIL PROTECTED] > Sent: Wednesday, April 06, 2005 8:05 PM > To: [email protected] > Subject: RE: The DA retested and loved again! > > > On 6 Apr 2005 at 19:58, Don Sanderson wrote: > > > I know we've been through this before but would you explain > > "back focus" again? My brain hurts tonite! :-) > > In really basic terms consider it the distance that the rear of > the lens has to > move in and out to acheive focus. WA lenses move a very small > distance from > close up to infinity whereas a 50mm lens moves quite a distance. > > > 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 >
