Secozoom 5-50x75. Since I don't have anything with this magnification to compare it to, I will say it is fairly good and an excellent value for the price ($400cdn). The scope is stable, repeatable and has almost 50 MOA of adjustment (7.5 MOA per revolution, 1/8 click). If you turn the knobs it will return to zero without issue. Out to 40x the optical quality it is great; at max zoom you have chromatic distortion and the image is not crisp, but it is usable. I wasn't sure what it would perform like, but it did come with a money back guarantee. I could have got one with less power, but I wanted to be able to see the holes in the target without having to use a spotting scope. It has performed well so far with about 100 rounds through the gun.
Here is an image at about 44x of a 7" post at about 200 yds. It was a hazy/smokey day taken through a window. This picture doesn't do it justice, but I don't have any others.
20160527_203830_HDR by
twoicebergs, on Flickr