For more info on eye relief and binoculars, you can check out this web page.
Here is my pro/con list:
Nice size and low weight
Crystal clarity, especially on a nice sunny day
Great contrast and color
Comes with strap and nice case
Nikon 25 Year warranty! $10 to replace if anything goes wrong with them within 25 years.
Rubber eyecups are soft and comfy Nikon Monarch 3
Easy to focus with a smooth twist
Eye relief could be better at 15.5 for the 10X42′s
Not up to the performance levels of the $1000+ binoculars (but these are $299 and come eerily close at times)
some softness at the edges
So there you have it. These have a huge following from those who own them and I now know why. For my uses the 10X45′s would be perfect for me, and at a price I can swallow. I enjoyed using these and now have to decide…do I send both sets back? For those of you looking for a set of binoculars that are built well, waterproof, have great optics and magnification, come with a superb warranty and are “all terrain” I can highly recommend the 10X45′s AND the 8X45′s. Both are SUPERB, especially for this kind of money. Really, they make my $56 Celestrons look like they are broken.