Q1: how does this bino compares (in terms of brightness, sharpness, color correction and usefulness of FOV) to the Pentax pcf wpII and to the Celestron Ultima?
A: Optically it is extremely comparable to both, actually it is better than the Celestron Ultima. The FOV is quite a bit better 288 @ 1000yds vs. 261 with the Pentax and 262 with the Celestron.
Q2: What prisms do these binoculars have, and what is the difference between the BaK-4 and BaK-7 prism? Thanks...
A: Thw Wind River's have BAK-4 prisms. BAK 7's are inexpensiveand reflect a great deal of light (which can create a dark grey image around the inside edge of the exit pupil (called vignetting) BAK-4's are top quality and result in a more clear, bright, round, un-light reduced image
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