Quote:
Originally Posted by chris lewis
Hi
You may have heard of 'Apparent' FOV [Afov] this the 'breadth' of the actual image you get in the eyepieces. Afov is the power of the binocular times the magnification, so a 10x50 binocular will give a 50 degree Afov
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Chris I've re-read your post about 4 times now. I think everything else you've written makes sense but I think you've not got this quite right. Minor point though. Your post was very useful to me.
According to the manufactuer's website
The Orion Scenix 10x50 has an AFOV of 70 degrees, not 50.
The Orion Scenix 7x50 of the same range has an AFOV of 49 degrees.
As I said I'm no expert in optics but in an over simplified view I would think the objective's curvature would be the determiner of power/magnification, while the curvature of the eyepiece would determine how that light is spread and thus AFOV.