Gilligan wrote:

"Bart" wrote in message
ups.com...
What is the technique for hanging two binoculars with straps
from the same binnacle? [1 pt]

Hang them from the navigator's balls.
(Quadrantial spheres for the uniniated).


Name the two most characteristics to look for when shopping
for binoculars? [1 point each]


Lens diameter and power. Too powerful you can't hold them steady. Lens
diameter indicates light gathering capability.

All that light gathering will do no good if doesn't get transmitted due
to undersized prisms.

Cheers
Marty

"Martin Baxter" wrote in message

All that light gathering will do no good if doesn't get transmitted due
to undersized prisms.

Coating is most important with prisms. You want to reduce loss of the
evanascent modes on the backside of the reflecting part of the prism.

http://www3.interscience.wiley.com/c...TRY=1&SRETRY=0