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Reflectors do not have chromatic aberration.. Coma and sometimes spherical aberration, are common, though. This can be made symmetrical (but not eliminated) by collimation. However, eyepieces they do, especially if they are poorly designed and combined with cheaper Barlows. This manifests itself with coloured rims around bright targets (like you described)
Last edited by bojan; 13-11-2009 at 01:56 PM.
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