Like other lens makers, Nikon has its own technical jargon for the features and specifications of its lenses. The first bit of Nikon lens jargon is the name – Nikon brands its lenses ‘Nikkor’’ – though some reviewers and retailers us the name ‘Nikon’ instead, just to be clear about who makes them. Nikon camera […]
ED (extra low dispersion)
Regular glass introduces a degree of light dispersion, which affects overall image quality. ED lenses uses special extra low dispersion glass to counteract this. Higher quality lenses typically use two or more ED elements in their design.