Germany's WW1 Zeiss Bifocal Scope: the Glasvisier 16
The Zeiss Glasvisier 16 is a rare 2.5x bifocal sniper optic from WWI, designed as a clip-on system for standard rifles like the Mauser 98. Its unique design features a magnified lower lens and a non-magnified upper lens, allowing for a 'no eye relief' setup. The optic utilizes a quick-detach mount and an oversized clip-on front sight, but its rarity suggests it was less successful than standard telescopic sights.



