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 […]
Fluorite is an expensive crystal alternative to glass which offers much lower dispersion and refraction to regular glass and can greatly improve the image quality of telephoto lenses. But its cost and manufacturing difficulties means it's only found in expensive professional lenses.