2" Eyepiece advice please

[Roy Batty]

Picking up from what DAZ posted - I've got a 32mm 70⁰ 2" Moonfish - it's OK over about 50% of the view in my F5 Newt but the coma gets quite bad towards the edge, but I can put up with that coz the central view is quite stunning on something like the perseus doulble cluster.

[dph1nm]

Yes I was thinking of the Newtonian diagonal - I came across http://www.bbastrodesigns.com/diagonal.htm for calculating off-axis illumination, but not being an ATM person I have no idea if this is relevant to the discussion of 2" eyepieces. I presume the problem is that if you go far enough off the optical axis you cannot see all the primary mirror in the diagonal.

NigelM

[beamish]

I'm going to jump in with the Moonfish too. I love it and the Cape is F6. When I get up close to the EP you could just fall in !!