The Canon lens protocol has been extended since the 1980s, and the commands for different generations of lenses can be convoluted. All the information is in a GitHub repository , so the curious ...

Probably the Canon lens most in need of updating now that the digital age is here to stay. In summary, the positive points of the Canon 100-400mm L IS USM are: Good contrast and colour.

Like the other two lenses that make up Canon's hybrid prime lens trio, the RF 35mm f/1.4L VCM offers a simple design that's backed up by excellent build quality and weather sealing. This is, after ...

[Sam] has a Canon EOS and a bunch of old-school FD lenses at his disposal. There’s one problem though: using these old lenses with an adapter means focusing at infinity is out of the question.

The problem is that there are plenty of great lenses for both Canon and Nikon, so we wonder why you'd need this adapter. For quick, fun experiments it will be great, but otherwise its hard to see ...