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Message: <blockquote data-quote="RAH" data-source="post: 1632584" data-attributes="member: 5834">Well, it sounds good on paper, but like some responses in that thread, I am skeptical about it when he says, "The trick is to look at a subject and know the lens well enough to turn the focusing at the speed which makes the sharp moment pop, and be able to stop PRECISELY at that point." I know that with my 120-600mm manual focus lens, there is no "sharp moment pop". I think at longer focal lengths, the depth-of-field gets so shallow that it is really difficult to distinguish in-focus from slightly out-of-focus. But, of course, practice would help, especially using a well-lit subject at not too far a distance. I recently took several hundred shots of cormorants using my 120-600 and not one was in really good focus. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" /> However, they were too far away anyway, and I think that probably none were sharp because of the distance, the poor "seeing" conditions (atmospheric haze, etc), and the lack of contrast. I think that my results would have been kind of poor even with my 70-300 plus EC-14.</blockquote>