Binger Classic 30x80 astronomical Binoculars BAK 4 prism Fully coated optics 30x power. Binger 20-140x80mm zoom astronomical binoculars 80mm objective lens diameter 20-140x magnification power. Multi-coated optics with center focus. Porro prism with BAK-4 glass. Binger 80mm objective lens diameter.Ideal for outdoor activities and sporting events. The item "Binger 20-140x80 astronomical binoculars BAK 4 prism 80MM Multi-coated" is in sale since Wednesday, March 28, 2018. This item is in the category "Cameras & Photo\Binoculars & Telescopes\Binoculars & Monoculars". The seller is "usbinger" and is located in Riverside, California. This item can be shipped worldwide.