found you some light reading :--
First of all, just what is Swarovision and why is it special? In a nutshell, Swarovision is a Swarovski term which encompasses a combination of field flattener lenses made with fluoride which, combined with long
eye relief of 20mm and what Swarovski terms "optimized coatings." "Field flattener" lenses flatten the
field of view optically so that there is no perceived
pincushion distortion which is often engineered into optics to eliminate
rolling ball or globe distortion experienced when panning across a scene. The use of fluoride in the manufacture of the glass used for the objective lenses in Swarovision makes them
High Density (or Extra-low Dispersion, if you prefer) lenses and provides the best color fidelity presently possible - largely through reduction of
chromatic aberration. (Swarovski points out that the machining process for the HD objective lenses is both sophisticated and complex and simply using fluoride glass in a binocular won't produce exceptional results if the entire optical system isn't tweaked for corresponding high performance.)
Speaking of chromatic aberration, none of us were able to induce it in common situations. Is it possible to induce chromatic aberration? We've heard some say that they were able to see color fringing on early production models of the Swarovski EL binoculars with Swarovision. We don't know whether that means that it was addressed by Swarovski before the model we tested for this review was made or we just didn't try hard enough, but all we were able to find was a faint yellow fringe above dark wires or branches against a clear, bright sky and just a touch of blue fringe below the wires/branches —
when viewed at the periphery of the field of view. It's worth noting that we only detected that after using the Swarovski EL binoculars for some time and then only when studiously looking for it!
Lastly, before we start the binoculars (EL Swarovski) review,
let's take a moment to recognize what the letters "WB" mean. The "W" is for a German word that means "wide angle." With European binocular makers, an
apparent field of view greater than 60° is considered a wide angle optic. The "B" stands for a German word which means "twist-up
eyecups" provided so the binocular is usable by those who wear eyeglasses and those who don't. All together, it would be correct to say we're talking about a Swarovski EL 10X42 W B Swarovision binocular. The "Swarovision" is added to distinguish this binocular from its predecessor, which was often simply referred to as the Swarovski EL W B.
Read more from original site:
http://www.opticsreviewer.com/swarovski-el-binoculars.html#ixzz3jfBfPJVb
enjoy