That one from Amazon is just like the one available from Radio Shack for about the same price. I had one of those. I found it difficult to get in close and focus at the same time.
Then I found ones like the one below on eBay. I bought one, and liked it so much I bought 10 more. I have given out a couple as gifts. The are really inexpensive and work better than the other one. The best part is no need to focus. You can push the scope in and out to focus if you want, but I find it is much easier to just push the scope into the bud and focus by moving it around and in/out. It's like moving through a forest of trichs, awesome. Buy this, you will not regret it. Get more than one, they're cheap enough.
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