So now I am really confused.
SBIG stt 8300 back focus is 17.5 mm
STTFW8G "mechanical back focus is 54.06mm
Does this include the camera or add on?
My Astro tech flattener has a back focus of 57mm so am i going to be screwed if it all adds ups.?
What does it mean mechanical back focus ? Is that distinct from optical back focus?
Arrrghhhhh!!!
Graz
