The standard rule...
Chevelle 427--is that "You get what you pay for." It seems to be even more true for optics than for items in general.
This is a high-magnification, large-objective, low-price 'scope. No experience with Osprey Int'l, but never having heard that Osprey has invented some new, special, way to cut expenses w/o cutting quality, I would steer clear of ANY 'scope in the 10-40x50 range, at that kind of $$.
Somebody is going to respond that they have a big Osprey, and it is clear as a bell and never given them any trouble, and used on a .338 Lapua Magnum, and cost them $200. If that were the general rule, how come serious long-range target shooters, snipers, and others who make their living depending on the glass on their rifles, will pay 10x that much for a 'scope?
Now, eighty bucks isn't much, and if you won't be hurt by losing, and want to risk that amount, well, go ahead. But if you take that 'scope hunting, well, let's just say, Bring A Backup!!!