Bought an unused unit of this binoculars second hand. The objective lens and eyepieces both have a green coating.
https://www.amazon.com/BFULL-Binoculars ... B073ZZMTLB
The seller originally purchased this pair for having a closer look at wildlife on her cruise trip to Antarctica, supposed to set off two days after the ill fated Greg Mortimer bound for Antarctica with its share of infected COVID-19 passengers.
They were eventually allowed to port in the only South American country that was willing to let them disembark on its shore: Uruguay, and were transported back to Australia back on an Uruguayan plane(kudos to Uruguayans). As her trip got canned, she offloaded the binocs to me.
As for me It is ideal for looking up at the night sky, especially now that we are house bound.
Ran some tests on this Bfull unit.
The torch light test says its
This is due to the inner ring of plastic inside the lens barrel constricting its light path from the 50mm objectives.
Another observation is that it is not Bak-4 prism but Bak-7 instead, as the diamond shadow is clearly evident.
It is also not 12x, but 9x instead.
It is definitely not 8.2 degrees but 5.4 degrees. If it is really 8.2 degrees, it will be 6x instead.
I compared with my 12 x 60mm Optix binoculars (5 degrees,
It is also not fog proof, ie, not nitrogen filled based on its construction. It is more water resistant as opposed to water proof.
It is OK when I watched the night sky and Milky Way with it.
Don't over pay, if you can pick up for $15 or less for a used unit to keep in the glove box of your car, then may be worth it.
Take care and keep safe,
Bill