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Message: <blockquote data-quote="WayneF" data-source="post: 305056" data-attributes="member: 12496">Not actually meaning to question anything, just curious a little, about the 40%?I have not used either camera, but feel certain I would also prefer the benefits of the D7100 features too.Ninkon specs say this about viewfinders:D3100:Penta-mirror95% frame coverageMagnification: 0.8eyepoint: 18 mmD7100:Pentaprisim100% frame coverageMagnification: 0.94eyepoint: 19.5 mmI have these two:D300Pentaprisim100% frame coverageMagnification: 0.94eyepoint: 19.5 mmD800:Pentaprisim100% frame coverageMagnification: 0.7 (of FX frame 1.5x larger, which would seem 0.7 x 1.5 = 1.05x DX equivalent)eyepoint: 17 mmIt's hard to describe the FX view... with same lens, the frame view is a 1.5x wider view, a bigger wider scene, but in the frame view, the objects in the scene are 2/3 size, a little smaller.  Simply because the scene is bigger.I am unsure of specific meaning of magnification. Obviously NOT in relation to naked subject view, since focal length zoom makes all bets be off.My guess it means we see the DX 24x16mm frame at 0.8 size, as if 19.2x12.8mm size? Eyepoint is eye relief, where the eye is placed behine eye piece.But I cannot account for 40% in there?</blockquote>