lens aberration

基本解释

Astigmatism -- a lens aberration that elongates images which change from a horizontal to a vertical position on opposite sides of best focus.
像散-該像差在最佳對焦點兩麪從水平位置到垂直位置拉長圖像。
Coma: A lens aberration which causes subject points to record as coma-shaped images. This effect is mostly found in fast lenses and when large apertures are used.
彗星差：透鏡的一種像差。它使圖像點帶有像彗星尾巴似的影像。這個情況多數在強光鏡頭，使用大光圈時發生。
Coma: A lens aberration which causes subject points to record as coma-shaped images.
彗星差：透鏡的一種像差。它使圖像點帶有像彗星尾巴似的影像。

Furthermore, we have achieved a wide horizontal viewing angle of 45 degrees by incorporating an optical lens that thoroughly suppresses unwanted elements such as aberration and distortion.
ENGADGET: Sony's head-mounted 3D visor is real, HMZ-T1 arrives in Japan November 11th