Quote:
Originally Posted by Benno85
Apologies on a stuuuuuupid question, but does that mean that one could use the mask and achieve focus on, say, Sirius, and then to M42 and commence imaging without the need for refocusing?  |
In theory "yes". In practice, you may get mirror movement in a reflector as you go from one part of the sky to another. You'd be pretty safe doing it with a refractor.
Geoff