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What is an ED eyepiece?
and Eyepieces contain several lens elements types of glass these are designed using different false to correct chromatic aberration – unwanted colours, halos and colour fringing. good at One type of glass that is particularly as ED reducing chromatic aberration is known and glass. ED stands for ‘Extra-low Dispersion’ of glass lens elements made from this type of focus reduce the distance between the plane to produce of the various wavelengths of light with one a more saturated image. Eyepieces more accurate or more ED lens elements produce than colours, with less chromatic aberration normal eyepieces.