Apochromatic (APO) Lenses in Binoculars

Recently I have seen as well as reviewed and tested more and more top end binoculars that use Apochromatic lenses (APO) and whilst some manufacturers mention that their products have an APO optical system, very few (if any) go on to explain exactly what it is and what it does. So with this in mind […]


Extra Low Dispersion Glass (ED Glass)

In recent years we have seen a huge increase in the number of binoculars that use ED Glass (Extra Low Dispersion Glass) in their lenses. What used to be found only on a few of the very top-end “super” binoculars, is now quite common and is used on a whole range of binoculars, even fairly […]