Review Summary:
I am very satisfied with the quality of the 10x60 Mariner Series binocular by Oberwerk. After a week of backyard use for astronomy, my initial impression is very good. I plan to submit another review after a few months of rigorous use. The images of star fields at night are bright and crisp. This is exactly what I wanted. Thanks Oberwerk!

Review Details:
After reading many technical articles about binoculars, I had a lot of questions about how to choose the right binocular for my purposes as a roaming amateur astronomer. The staff at Oberwerk kindly and patiently answered ALL my questions. This was important to me, as I reviewed numerous other binoculars with a bewildering array of features.

The 10x60 exit pupil closely matches my pupil dilation of about 6.1 mm for optimum viewing at night. There are few 10x60 binoculars on the market, and so here Oberwerk has a smart advantage.

The padded shoulder case is big enough to allow me to keep the ipd set wide for immediate use. The 10x60 has firm ipd and diopter adjustments so they don't shift involuntarily during use. The eye cups stay in place, the rubber grip is secure, and the whole setup is comfortable.

I would mention strictly for the sake of completeness that the objective lens covers are a bit loose, and one comes off in the case when I remove the binocular. But I think this is almost trivial. I believe that 10x60 is close to the maximum suggested weight and magnification for hand-held binoculars, but the view is definitely worth the weight!

When The product arrived in the mail I was so impressed with the packaging! The box containing the binocular was itself inside a much larger box and was carefully insulated against shock by several inches of packing peanuts. And outer box had "Delicate Instrument" warning stickers on every side. It was really the most secure packing I've ever seen.

The first night after the 10x60 arrived, I couldn't wait to try it out. I immediately spotted the M5 globular star cluster. I've never seen so many bright stars in one field of view. It was awesome.

I plan to test the waterproof quality of the 10x60 during a sailing trip in the next few months. Then I will submit another review with more details. In conclusion, I highly recommend Oberwerk binoculars! Happy stargazing!