Quoted:
Interested in the Diamondback 10x42 binocular and the Fury 10x42's.

1.  Are the binoculars made in the USA? No. There are no binoculars that are made in the USA by anyone that I am aware of. The Diamondback and Fury models are both made in China. In fact, every binocular I know if in or near the same price range are all made in China. Our higher end models are made in Japan (Viper and Razor). However, we design our products here in the USA and have a full service and repair facility here in the USA.
2.  Are the lenses and prisms made by Vortex? No. We use prism and lens manufacturers in Japan.
3.  Are both binoculars collimated before leaving the factory? Yes.
4.  If they are collimated what method is used, i.e. lasers? The factory uses a Fuji UBMM. We also have a Fuji UBMM here at our facility for collimating binoculars and offer the service free of charge as part of our VIP warranty, if the need arises.
5.  How many layers of coatings are on the lens surfaces? We are very strict at protecting information about our coatings, but I can say that we use a proprietary system that yields the best light transmission and color fidelity that we can design, while maintaining the price point of the product. The best I can give you as far as a number is concerned is "many".
6.  What material of coatings are used? Each layer is different and optimized for targeting a specific region of the visible spectrum in order to give the best full spectrum light transmission and color fidelity.
7.  Are only the air-glass surfaces coated or are all the surfaces coated? Air to glass are the only surfaces necessary to coat. By air to glass, I mean any surface that isn't touching another glass surface (such as in a doublet or triplet), so this includes interior glass surfaces that are touching the dry nitrogen gas inside.
8.  Does the air-glass surfaces have more coatings than the inside surfaces? All air to glass lens surfaces are fully multi-coated the same way. Prisms require some other special types of coatings that are not necessary on lenses, such as phase coatings and high reflective coatings.
9.  I've seen that the Diamondback uses a BaK-4 prism exactly what is this?  Is it another vendor's prism? BaK-4 is the type of glass material used in the prism. It is a common type of prism glass used in nearly all roof prism binoculars.
10.  What type of prisms are used in the Fury? BaK-4
11.  The only construction difference I see between the Fury and the Diamondback are the mirror coating for the Fury and the prisms, are there other differences? Yes. The Fury has a center diopter adjustment, rather than the diopter being located on the right barrel near the eyecup. The Fury also uses more glass elements for a better optical design, which yields slightly better resolution.
12.  What is the total percentage of light transmission for the Diamondback and the Fury? We typically don't provide light transmission on binoculars because there is no industry standard and in fact many companies are using very misleading info. For example, using light transmission from a single surface and claiming it's total light transmission. The best I can tell you is that we try to make our products the best we can for their price point and in real world side-by-side comparisons we meet or beat comparably priced models. If light transmission is a big concern for you the best thing to do would be to compare side by side, rather than rely on manufacturer specs.

Thanks.

Quoted:
Thanks, Sam.  Tell your boss that your prompt and informative reply just made a sale.  I was considering the Vortex Diamondback 10x42, Leupold Cascade 10x42, and the Nikon Monarch ATB 10x42.  Your price point and unconditional (and transferable) warranty sold me.  I ordered a Diamondback 10x42 from Optics Planet after I verified they were an authorized dealer on your website.  I look forward to using them on my first ever deer hunt this November.