>High Magnification , High Eyepoint, x% coverage?

The higher the magnification is, the bigger the viewing image will be 
(through the viewfinder).

High eyepoint simply means your eye can be further from the eyepiece, yet 
still see the whole image throught the viewfinder. However, there is not 
single standard to this. 17mm (the distance between your eyeball and the 
eyepiece) can be called high eyepoint, so to 13mm. I think Nikon was the 
first to use this term (though not necessarily the first to invent it).

Say, if the actual image on the film is 100%, 92% coverage means 8% of the 
image could not be seen through the viewfinder.

regards,
Alan Chan
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