The 90mm objective is rare in the world.  It gathers more light than 80mm and is lighter and much less expensive than any 100mm.  It's another good astronomical binocular.  The 20x90 has all-metal body and hinged central bar as the mount. 

20x90 comes with Bak-4 prism, broadband full multi-coating, central focus with right ocular diopter adjustment, brass 1/4-20 tripod adapter threading, case, caps, and strap.   

Pricing: Our wholesales prices are kind of case sensitive. If you're a serious dealer or wholesaler, please email for the wholesales prices. To save time for both of us, you're recommended to read Initial contact first.