Q1: Are there any quality binoculars that are fogproof and have zoom capability?

A: Yes, there are quality Zoom binoculars. Brunton makes the Epoch 8-15x35 Zoom. And it's real quality, with magnesium alloy frame, state-of-the-art phase coating, and full multi-coating. Here's the URL; just paste it into your browser's address window: http://binoculars.com/products/brunton-epoch-8-15x35-zoom-31560.html. Leica, meanwhile, makes the Duovid line of high-quality binoculars. These offer either 8+12X magnification or 10+15X. They aren't true zooms, however, as they are not continuously variable between the low end and the high. Here's the URL for the 10+15x50 Duovids: http://binoculars.com/products/brunton-epoch-8-15x35-zoom-31560.html. Again, quality is very high. Leica binoculars are among the world's best.

Q2: What is the weight and the length of the Bushnell 10-22x50 Weatherproof Zoom binoculars? Thanks!!

A: Bushnell's Legacy 10-22x50 Weatherproof Zoom binoculars are 7.75 inches long. They weigh 2.4 pounds with lens covers in place.

Q3: What is "clamshell," ie. the difference between the two legacy 10-22x50 binoculars. One is listed as clamshell and the other isnt. David Prior

A: Clamshell binoculars have the porro-prism "dogleg" enclosed within the body. That gives the binoculars a clamshell shape, unlike that "dogleg" shape of traditional porros.