What kind of magnifications can I get?
Digiscopers like Mike McDowell have come up w/ a formula for calculating the approximate magnifications capable with a given digiscoping setup:
EFL = Effective focal length of digiscoping rig
FLc = focal length range of P&S camera (mm)
Epmag = Scope eyepiece magnification
50mm = equivalent 35mm camera magnification (1X)
So, for example: a Nikon Coolpix P6000 w/ 24-112mm lens range
at 112mm (4x) on a Zeiss 20-60x eyepiece at 20x would give
EFL = (112/35)*20*50 = 3200 mm!
The total range of magnification for this rig is ~800 - 9600mm! or 20 - 240X!
With mirror less cameras becoming more popular with today's digiscoping rigs, one can get a magnification using this simple formula:
EFL* = EpMag * CFcamera * FLc
where CFcamera = crop factor of camera.
But do yourself a favor and work at the lowest magnifications on the camera (14-18 mm) and scope (20-30X) for sharpest images and most keepers.