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Old 19-09-2006, 11:38 AM
ausastronomer (John Bambury)
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Join Date: Mar 2005
Location: Shoalhaven Heads, NSW
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Fox,

It won't be quite as good as you think, because it may turn you off a perfectly good night time astronomical eyepiece. Panoptics are not a great choice for daytime use. I alluded to this in my previous post. The Panoptics, some focal lengths moreso than others, suffer pincushion distortion which is a type of rectilinear distortion. This distortion will cause straight lines (like the edge of buildings or the waterline of a ship) to bend. It is not an issue for astronomical viewing and this aberration is left in the eyepiece design to increase the sharpness of stars near the edge of field when used in fast F-Ratio telescopes.

Consequently if you use the eyepiece in the daytime ignore the distortion, because you don't see it at night except when you are panning the sky, which isn't a concern for me as it is not intrusive under these conditions.

CS-John B
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