Review of Maven B2 Binoculars

Maven’s optics are no joke and the same goes for the B2 binocular. One thing to keep in mind is that Maven sells their products at direct prices. Although the B2 is quite pricey, an analogous product from a high-end European manufacturer could cost twice as much. Let’s have a look at the main features of this bino.

This product is available in three models; the 7x45, 8x45, and 11x45 magnifications:


There are two unusual features of the B2 that immediately noticeable.

First, the 45mm lens size. You’ll find plenty of binoculars with 42mm lenses and big ones with 50mm lenses. The 45mm is very rare and falls somewhere between the two popular sizes. They have higher light intake than 42mm, but are smaller and lighter than typical 50mm ones.

The other peculiar feature is the Abbe-Koenig prism. Prisms in binoculars are responsible for turning the image upright. The Abbe-Koenig has better light transmission, hence brighter views, but is a bit more elongated than the Schmidt-Pechan prism. So these binos are a bit longer than analogous binos with shorter prisms.

Overall, the optical quality of this bino is superb, there’s no question about that, it’s up there with the high-end brands that cost much much more. They are great in low light, the view is clear all the say to the edges of the field, and you also get decent depth of field for roof prism binoculars.

The B2 is not a lightweight binocular mainly attributed to the objective lens size.

Other components that come with the B2 include the neck strap, tripod cap, and a diopter.

The focus knob is stable and easy on the hand. The diopter, eyepiece, and the focus rings are all easy to adjust. One notable thing is the tightness of the hinges between the barrels, which makes adjustments difficult during first time use.

The eyepieces are protected by rubber and can move to three different positions when adjusting for eye relief. The three models have an eye relief ranging from 16 mm to 18 mm – good enough for most eyeglass wearers.

The B2 binoculars are meant to be used in all weather conditions. The barrels are filled with nitrogen for fog protection. The IPX7 standard mark means that these sets of binoculars can be used underwater for 30 minutes as long as the depth is below 1 meter.

The outer surface of the objective lens is coated to protect it from scratch, oil, and dust.

The B2 are sold with a neck strap, carrying case, and lens covers.


  • Bigger lens than typical 42mm
  • Less bulky than big 50mm
  • Weather-resistant
  • Excellent for use in wilderness, birding, hunting
  • All weather binocular


  • Not very compact

The Maven-built B2 proves to be what hunters and naturalists need at a very affordable price with features only expected on a high-end binocular.