Quote:
Originally Posted by mental4astro
Eyepieces.
Eyepieces are designed to FIRST work to a particular shape of focal plane. Get the right eyepiece in the right scope, and you have an optical match, and the image is as good as it gets. Put the wrong eyepiece in the wrong scope design, and a whole host of aberrations will become apparent, and this is an optical mismatch.
Alex.
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Alex,
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If what you have said is true, why is that many eyepieces, including short focal length Pentax XW's (3.5, 5, 7 & 10), Nagler T5's and T6's, Televue Radians, Vixen LVW's, Nikon NAV HW's and Docter Optics 12.5mm all work equally well with excellent flat field views, in all telescope types, including Newtonian reflectors, refractors and Catadioptic Telescopes ?
Further, if what you say is true, why is it that my 14mm and 20mm pentax XW's show Field Curvature when used in both a Newtonian Reflector and in a SCT ?
John B