As a tri-focal glasses wearer I wanted a monocular that would be like my rifle scope for checking out the heads of deer for antlers. I found the barska 10 x 40 mono to be just the thing. Lenses are very clear and do the job admirably.
Pros: works great while wearing transitiona tri-focal glasses
Cons: none that I can see
This review was written in the old system and had content requirements that are different than reviews written today.