The biggest problems with the USB scopes are the plastic lens on them. You can always tell on them because of the lack of clarity of the image and the pink color on copper coins. Best to get one that works right the first time. Buying a scope with too much power is not the right scope. 2-3 different powers are not the right scope why? Because you need to see sometimes something in between these settings. So a scope with an infinite zoom is better. That way determine how much you want to see. The better choice for power is the 3.5-35x zoom scope. I've had mine for years. Any problems I've had through the years with it I figured out how to fix. A while back I was in a thrift store and there was a new one. It had a missing glass table round lens ( probably the reason for sending it to a thrift store) and I bought it. It was 10% of what my other scope was. Still haven't set it up yet. Someday........




























