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Message: <blockquote data-quote="Binastro" data-source="post: 3531929" data-attributes="member: 111403">Hi Henry,I tried again.Looking at a lit 6ft neon tube in the kitchen and using the white base also.The tube is about 30ft distant.The bottom is at 11 deg elevation the top 13 deg elevation, so foreshortened but vertical to me.Placing the tube near the field edge of the 8x42 MHG.The strong mauve/purple on one side of the white base and the strong green cannot be focused out. They remain the same colours but get more blurrred.The tube remains vertical at the edge i.e straight. There is no detectable pincushion or barrel.However, the tube gets quite a bit shorter as I move to the left or right side i.e. near the field edges.I get afterimages from the bright tube, so don't want to do this for long.This is a very bright binocular, about the only thing going for it in my books. At least my sample. And a reasonably wide field.Does this help?</blockquote>