Magnifications

Hello,

I would like to have the ability of changing the magnifications rapidly with a CCD camera (and a telescope), preferred with minimal focus shift or with a par-focal lenses,
Do you know of any potential product that may fit the above. Any creative solution is welcomed.

Best regards,
Ido.

No, nothing off-the-shelf meeting all your criteria
comes to mind. Perhaps something could be made
utilizing a zoom eyepiece (like TeleVue 8-24mm zoom).

There is something from Burgess or Denkmeier or somebody that allows a wide-field reducer, a blank, and a barlow lens--all on a slider. Slide it back and forth from one to the other. I have seen it used with Binoviewers.

Anybody have the details or do I have to figure this one out myself?

Alex

Flexible magnifications AND Rapid? Not sure!

A ~flexible~ solution is the Baader FFC which is good for 2x-8x, but to make it quick you would need to remember 3 things - your spacing settings ahead of the FFC, spacing behind the FFC, and the focus setting for each magnification. With practice this becomes rapid but it takes a bit of hair pulling first.