Thanks very much. My 9mm GSO plossl is the highest mag eyepiece I've got, giving 133x on my 10" dob. My concern with the Pentax is that it would only give a fraction more. I could barlow it but then I'm down to 4.25mm and I think I'd lose all clarity in my backyard almost all of the time. The ES 6.7 seemed a good amount of magnification but still allowing a lot of use. Does that sound right?
Quote:
Originally Posted by Steffen
Just regarding the flatness of field, I can't detect any lack of it with the XF 8.5 in my (totally flat field) Mak. It obviously has a much narrower apparent field of view than the ES 6.7, but from memory the field that it does show is sharp all the way across. I shall double check to be sure as soon as the clouds part.
Cheers
Steffen.
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