On 2 Feb 2006 at 8:28, mike wilson wrote: > That doesn't sound logical to me. The reference plane will be where the > screen beds against the body, which will be the upper surface. It doesn't > matter that the image goes through the screen - it's transparent/colourless. > As long as the gg is aligned with the reference plane, focus (having been so > before) should be correct. Only if it is not bedded (and focus would vary > across the frame, probably) or installed the wrong way round will focus be > off.
I doubt it's that simple, there is a lens in there too. 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
