Card C00010

RBF DEFINITIONS
Aberration Limit:

"See the 15° between the 45° and 60°. . .
"We had 7° spherical excess. It could be that the two of
them add up to 15° . . . Approximately? This could be
the maximum possible aberration."


Cite RBF to EJA, Beverly Hotel, NY, 22 Jun'72