Very affordable; I didn't expect much. I have Nikon Marine 10x50 binoculars. They collect the light very well. Although they don't collect as much light, they deserve respect. I like the fact that: 1) you have a diopter adjustment on the right eyepiece. Better in the mouth. hand over to the people. My others are on the left. 2.) You have a very good design for the pupil size across the width of your eye. Can achieve perfect match with no parallax error. 3.) These are high performance multi-coated lenses as you would expect from BaK-4 prisms. 4.) Lightweight, 1.5 lbs. My Nikon weighs 2+5 lbs.) The front eyecups (large lenses) stay on the goggles to avoid losing them. Also comes with a nice carrying case and neck strap. I tried them for stargazing and they are wonderful. For the money I'm shocked at how good they are. I got them for free for an honest review. I made other products that do not meet the requirements and did not write a review but returned the product. You won't be there. Enjoy! *By the way, I got them for free for an honest review, I received other products that were below average and returned them with no review. So if I write one, it's true.
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