Canon Lens Label August 11, 2020

Canon Lens Label Interpretation

AFD:Arc-Form DriveArc DC motor is developed for AF drive of early EF lens. Unlike the USM motor, the AFD motor focus has sound. DO: Multi-Layer Diffractive Optical ElementCanon announced on September 4, 2000 that it had successfully developed the world's first "multilayer diffractive optical element" for use in a camera lens. The multi-layer diffractive optical lens...

Canon and Nikon Lens August 10, 2020

Anatomy of Lens

When everyone started using DSLR lenses, I felt confused: What does the name Canon EF 70-200mm f/4.0 L IS USM mean? What is Nikon DX AF-S NIKKOR 18-55mm 1:3.5-5.6 GII ED? This string of abbreviations is almost like a strange language to novices. Today, let us use some lens labels from Canon and Nikon to tell...

August 9, 2020

9 Basic Knowledge of Lens

How to know the parameters of lens?Each manufacturer has its own definition. Take the above Nikon lens as an example. The lens is DX AF-S NIKKOR 18-55mm 1:3.5-5.6 GII ED DX: Nikon has developed a format for its "non-full-frame cameras", which corresponds to cameras with smaller light-sensitive components, so that the lens can be made smaller...