I have to say I'm impressed with the quality of the optics in these Celestron UpClose G2 10-30x50 Zoom Porro binoculars! The collimation was a bit off so I had to adjust the prisms a bit but once adjusted the binoculars worked fine. I could only find one set of prism adjustment screws for vertical alignment, but I couldn't find any horizontal adjustment screws. Luckily I didn't have to adjust the prisms horizontally. Focus is a bit soft at the end of 30x, but that's not a concern as I can easily go back from around 25x to 28x and get sharp focus. At 30x there is some loss of light but the image is still quite bright. Overall I would recommend them to anyone, especially in the $50 price range. Are there better binoculars? Of course, but you have to pay more than $100 to buy them! If you are looking for affordable binoculars then this is what you need. If you are looking for a good pair of binoculars with a large zoom range, you should buy this one! I'll be taking them to see the bald eagles this weekend, the skies should be light and clear so I have an even better idea of how well they are actually doing.
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