I get that, I’ve been shooting for twenty years. The confusion is that the true focal length and the full frame 35mm focal length are used interchangeably. The

I get that, I’ve been shooting for twenty years. The confusion is that the true focal length and the full frame 35mm focal length are used interchangeably. The Canon link doesn’t make it clear other than to suggest it doesn’t really matter once you use 35 mm as your reference point.