Actually, mm is a millimeter abbreviation. It is a length unit used to measure lenses and other optical or photography… Read More »What does the “mm” stand for on a Lens?
Canon’s EF 200-400mm f/4L IS USM Extender 1.4x is a monster. It’s nearly twice as long as the Canon EF… Read More »Canon EF 200-400mm f/4L IS USM Extender 1.4x review
First, some historical context is necessary. That which we are about to discuss is without a doubt going to be… Read More »STM vs USM Lenses: What’s The Difference?