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Message: <blockquote data-quote="Binastro" data-source="post: 3545470" data-attributes="member: 111403">Just looked at Orion with my reading glasses and one Nikon teleconverter.The field is about 1.5x vertical Orion, Betelgeuse to Rigel.Approx 25 degrees.Stars sharp and I see stars not visible without the unit.Edge performance is quite good.Without glasses probably 30 degrees but not in focus so useless for me.My pilot friend with excellent eyes cannot focus it without correction. He is probably a bit far sighted.I think that these are probably optimum for minus 1 dioptre short sight.And for younger folk with good accommodation.The nice crescent moon is not good for me as my pupils are about 5.5mm, when they don't work well nowadays.I will probably use one as a monocular with the Minolta Vn corrector.The Dowling and Rowe 4x22 independent eyepiece focus binocular is better for me with its 16.5 degree easy field.</blockquote>