Weaknesses of Transitions Photochromic Lenses?

Answer Photochromic lenses are those which darken when exposed to sunlight. Often referred to as "transitions lenses" this is in fact a reference to the largest retailer of photochromic lenses, Transition... Read More »

Top Q&A For: Weaknesses of Transitions Photochromic Lenses

What are the differences between photochromic lenses and color-tinted eyeglasses lenses?

Photochromic lenses and color-tints are different. The difference between photochromic lenses and ordinary color lenses is that photochromic lenses can change from light to dark depending on the am... Read More »

When was the word"transitions"as in"Transitions lenses"trademarked?

PPG Industries, Inc., the parent company of Transitions Optical, Inc., registered the word mark for Transitions eyeglass lenses and lens blanks on January 9, 1990. Its first commercial use occurred... Read More »

Are the Leica Lenses i the new Panasonic cameras genuine, and how good are these lenses?

All of these type of lenses are considered as certified by a manufacturer. Carl Zeiss, and Schneider-Kreuznach do this a lot too. If it's certified by any of these manufacturers you should have con... Read More »

What is the differen between DX lenses and FX lenses for Nikon camera?

DX type lenses are made specifically for Nikons digital SLR cameras. The optics are focused for use on their APS-C digital sensor which is smaller than 35mm film frames.FX type lenses are "Full Fra... Read More »