Johann Gambolputty, post 4,
On the WEB-site of House f Outdoor I have published a power point with the history an quality development of Swarovski Optics. To make that power point I have, among others, measured the transmission spectra of the binoculars from the different time periods. It is obvious from these data , that the transmission increases enormously with the production time and my guess is that this is caused by using better optical glass but especially using improved coatings.
Gijs van Ginkel