The ACULON A211 binoculars are built with multi-purpose functionality and a lightweight ergonomic design. These binoculars are perfect for those looking for extremely versatile high quality and economically priced optics.
10x50 Specs: Magnification: 10x Objective Diameter: 50mm Angular Field of View (Real): 6.5° Angular Field of View (Apparent): 59.2° FOV at 1000 yds: 341 ft. Close Focus Distance: 23 ft. Exit Pupil: 5mm Relative Brightness: 25 Eye Relief: 11.8mm Size (Length x Width): 7 x 7.8 in Weight: 31.7 oz.
I use the Aculon 10x50s in conjunction with a smartphone app to search for and spot satellites. Crisp images and a good field of view are a necessity and the Nikon ticks all the boxes. I too found the diopter a little tight at first but once "zeroed" it stays there so, for me, it's a plus.
Not waterproof, but astronomy in rain is never a concern, is it?
I am impressed with all the Aculons, and these are no exception. For inexpensive units they never fail to amaze me, it's true. The diopter ring is indeed rigid, but it may be a plus doing away with a locking mechanism. Optically nice, clear, crisp. Lack of waterproofing is a real drawback if you live in a humid environment, because mold/milder/fungus otherwise will be happy to feast on the interior lenses and prisms.