Quote:
Originally Posted by madbadgalaxyman
Why don't they make these Maks a longer Effective Focal Ratio
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But they do! The Alter M615 is f/15 (so are the M715 and M815, in 7" and 8", respectively). My MK67 is f/12.
There is also an 8" f/6, so I'm sure there is a case for faster Maks. I suppose that reason would be imaging, but I don't pretend to understand all the various trade-offs that go into telescope design.
Cheers
Steffen.