Quote: Raybo:
One more question.
Will the magnifier make the image look darker?
Let's just say i'm using my 400mm at f8, will the magnifier still help me focus better?
Thanks again,
Ray
No, the magnifier will not make the viewfinder darker, though some people report slight vignetting in extreme corners of the viewfinder. This can be overcome by moving your eye in the eyepiece.
It will magnify your view by 1.35x if using the KPS--this surely helps manual focus at all focal lengths, though the selected subject matters too.
The darkening of the viewfinder, at f 5.6 and smaller, occurs with a split prism--are you using a split prism? I think you may have conflated the effects of split prisms and magnifiers.