I had a Simmons Aetec that just went out of focus when I turned the power ring up. Moving the power ring, I could get it to focus, but the power was not moving. That was on opening day a few years ago. Luckily, I didn't get a shot that day. When I got back to camp we set up a target and shots were more than a foot apart! I called Simmons even though I was sure I did not want a Simmons again. Their customer service was horrible! Which made me more determined to get the scope replaced. I finally got one about 7 months later, never mounted it on a gun! I threw it in the trash!