Glass and Prism Quality
Bak-7 Prisms (borosilcate crown glass) are lower in quality than Bak-4 and as an isolated factor light transmission is reduced by 10-15%, resulting in a lower brightness image than that produced by Bak-4 prisms.
Coatings help improve light transmission, especially in roof prism designs. This binocular is rated as MULTI-COATED, meaning that at least.
The 10mm eye relief on this binocular provides comfortable eye relief for non-spectacle wearers.
This binocular has an exit pupil of 5mm, for use in dim twilight and dawn light, ideal for hunting, wildlife observation and birding.