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Message: <blockquote data-quote="WayneF" data-source="post: 184060" data-attributes="member: 12496">Yeah, if we can assume the DX 1/1.5 size is  already (lets say) close to 1:2, there are two ways to think of it.Maybe you wont miss too much without extension, only between 1/1.5 and 1:1 magnifications.  1:1 is really sort of a special case anyway, I'm probably back at two feet much of the time with my macro lenses.This is actually nonsense though, because the 1:2 is actually x1.5 too, so it is 1:3 on DX.  I mean, if for the same view.But still there could be times you really wanted 1:1, knowing you only get the smaller cropped central area, but you still wanted close for magnification.  Then 1.2 is not enough, at least not all that could be done with extension.But you have the extension, so you can always do what you need to do at the time, use it or not.</blockquote>