What does frame coverage mean? What does Magnification mean?

Nikon's D7000 has 100% Coveage… Does this mean my framing will be right. There will be no extra. I'm a critical framer, what I frame I mean to frame so much. I can't have this *** where there's more. I might go from Canon to Nikon.

100% is just that. You see exactly what the sensor records

The typical 97% frame coverage was just fine for 35 mm SLR's because it described exactly what was visible when transparency film was mounted in "slide mounts".

Now we don't need that extra room.

Just for fun

Some Nikon DSLRs have 100% viewfinder coverage, some don't; likewise, some Canons have 100%, some do not.

The Nikon D7000 and the Canon 7D are two that have viewfinders that show 100% of the area covered by the sensor. More commonly, cameras give about 98% - a margin for error that prevents cropping too tightly and losing parts of the edge of images. It also helps keep the image in the part of the lens field where resolution and sharpness are highest and distortion is minimal.

If you want to keep to Canon, the 7D is a superior instrument to the D7000: probably the only true pro camera with an APS-C sensor… But the D7000 looks pretty close and I wouldn't be surprised if the next FX Nikon matched or bettered the 7D; but by then, of course, the next Canon would be on the market. Changing brands is rarely as economical a way to get a better system compared to waiting one generation… And I'd say the same thing to any Nikon user contemplating switching to Canon.