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Message:: [QUOTE="SuperDave, post: 2666936, member: 1892"]Consider "optical magnification" to be anything involving solely the lens(es), be that moving lens elements within a group inside the lens, or moving the whole assembly viz-a-viz your eyeballs, to manufacture magnification. "Mechanical magnification" is the photographic equivalent of "mechanical advantage" offered by pulleys and levers, in this niche due to the fact that pixels are microns apart on the sensor, and a mere hundred or two per inch on a computer monitor. My camera sensor has 4448 pixels per inch, and my monitor has 109 pixels per inch. That's a helluva mechanical advantage. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> Mechanical magnification involves solely a digital image sensor and a monitor.[/QUOTE]