Hi All
Can anyone please tell me the filter distance a filter in a starlight xpress 7 position filter wheel would be from the ccd end of the filterwheel?
I keep coming up with approx. 30mm provided the camera (17.5mm back focus) is mounted flush to filter wheel body and not through T48mm threads)
I'm trying to work out if a 1.25mm filter would vignette on a aps-c size sensor using it on a F4 scope.
Does anyone know of an online calculator that can work this out?
Cheers
Joe
