Again I may be off on the 5% figure, but the affected area is so small that I never notice it unless deliberately testing for it. I just ran out and checked again viewing the Moon. Honestly, I do not detect any visual light drop-off at the edge of the field. There is a bit of image distortion but again it's way out at the edge where it normally isn't noticeable (and trying to gauge it accurately with the Moon at the edge of the viewable field is great for inducing eyestrain! ).
Now, concerning TFOV: What is the star at the apex of the Hyades? Y Tauri? Well, it and Aldebaran just barely fit into the FOV. As yet I don't know what the distance is between these two stars, but whatever it is, that is the TFOV of these binoculars.
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Re: Update: Very Short Test on Vixen 16x80 Binocul
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