Quote:
Originally Posted by alistairsam
Hi,
I know the whole point of this thread was whether longer focal length guidescopes help or not.
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yes it has sort of gone that way, but my basic question was whether going to a longer
imaging scope required better tracking per se - the answer was "not necessarily" - don't need better tracking if the camera pixel scale is preserved.
I found that my HEQ5 was right on its comfort limit with an f4 200 and sometimes irregular tracking would produce RA extension of stars. EQ6 is a lot more reliable at 10+kg. Could also be due to differential flex/mirror slip. Doubt that a longer guide fl would help - easy to test with a Barlow though. As others point out, OAG is a better guide solution, but it is not necessarily easy to arrange at f4.
regards Ray