Assertion: eyepiece | /r/AtLocation | off-axis
Facets:
value: well
type: DEGREE
value: for fast focal ratio scopes
type: PURPOSE
value: acceptably
type: DEGREE
Source sentences:
text: If you run mostly with f/7-f/8 scopes than most eyepieces work acceptably well in the off-axis.
text: Now in the effort to make eyepieces perform better in the off-axis for fast focal ratio scopes, most designs less than 57 degrees actually have some level of rectilinear distortion even when less that 57 degrees.