Originally Posted by David Swain
Holger puts it rather well:
"Wide angles are tough: Optical aberrations increase rapidly with the angle of view, and even a sophisticated design leaves a lot for the amateur optics tester to pick at and complain about ("poor edge-sharpness!") on the Internet discussion boards - something no high-end manufacturer likes to read about his product."
Holger also says that it would be possible to make a modern SWA binocular in say an 8x40 that would outperform the older SWA porro's. It's just nobody has done it. What's the widest quality WA binocular available today outside of the Nikon EII?