| http://www.w3.org/ns/prov#value | - However, there are two types of coma, i.e., m coma which is the coma in the meridional plane and S coma which is the coma in the sagittal direction, and when one of these comas is not corrected, the resultant image becomes an image of poor contrast accompanying flare, but S coma is extremely slower in the movement at the aberration correcting stage than m coma and it is therefore difficult to corr
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