1. Yoder, Paul R. Mounting Optics in Optical Instruments. Bellingham: SPIE, 2002.

2. There are different conventions for the use of "convergence" (and "divergence"), depending on whether the optical axes of the binocular are converging or the optical axes of the eyes are converging (to accommodate the diverging optical axes of the binocular). The usage here is the latter. It is simple to tell which convention is being used: the greater value is for converging eyes (diverging binoculars).


- Choosing



There is no "ideal" binocular for astronomy; the individual choice is therefore determined by the reason for choosing binoculars, the purpose to which the binoculars will be put, and the budget.

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