Yosemite 6x30mm

I could see no difference between the good central sharpness and view with Yosemite BX-1 and Kowa YF30-6, which was 25 more expensive when I purchased it in UK but could be worth it for the better eyecups.

However, and if weight is not so important, there are more substantial binoculars available at these prices.
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These were my very first binocular for birding and I still use them occasionally. Overall, for the price you can't beat these. I think they are the best inexpensive binoculars out there. They are very sharp and bright and rather comfortable to hold. Everyone should have a pair of these, as sometimes the 6x power is great for close bird watching or butterfly watching. The FOV is wonderful. I liked these over the 8x pair I owned. I now use 7x42 Leupold Cascades. I really like the Leupold brand. They have never dissapointed me and I've owned 3 pairs.

Just a reiteration really to what others have said. I own a pair of Swarovski "Habicht SL" and have had a pair of Leitz-Leica roofs and can say that 99% of the people out there would have a hard time seeing any difference in them save FOV in the Habichts (which of course are 7X42!) and slightly better edge sharpness. Of course they are $600.00 so I guess you've gotta get something for that extra money! The eye relief (cups) on these little glasses are easy to use and the glass is rugged over all; Leupold learned that lesson in their rifle scopes.