ATM Another optics test - Jupiter's moons

[Lynne and Larry Manuel <lynneandlarry.manuel@sympatico.ca>]

Tom Krajci wrote:
> What's the smallest scope aperture you would need to see a
> moon against the backdrop of Jupiter?

As a partial answer to the question, I routinely watched Galilean moon
and shadow transits with my homemade 81 mm f/14 Fraunhofer refractor.  I
used Chance Pilkington glass and spent at least 300 hours on the project
[1986-87].  It ultimately showed quite a good star test - with a slight
‘turned up edge’ in mirror-making terms.

Larry Manuel

-- 
lynneandlarry.manuel@sympatico.ca
Mississauga, Ontario, Canada