August 11, 2020
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...
August 10, 2020
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
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...
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