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Message: <blockquote data-quote="fotojack" data-source="post: 91441" data-attributes="member: 16">Jon....MM means millimeter. Try this.......look at the top right corner of your camera. You should see a little circle with a straight line through it. When the mm of a lens is mentioned they're referring to the distance from that little circle with the line through it to the farthest lens of that particular lens. The little circle with the line through it represents the surface of the sensor. So...the distance from the sensor to the outermost lens is the lens's millimeter. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />[ATTACH]21210[/ATTACH]</blockquote>