62 ° aspheric field of view. Large field of view: up to 62 degree field angle, surpassing the declining 58 degree TMB eyepiece. Minimal distortion: usually, the distortion of PL eyepiece is about 10%, that of ordinary or eyepiece is about 8%, while that of Zeiss or eyepiece is only about 4.5% after using aspheric surface, but the price is very high.
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