I bought a pair of these Swarovski Curio 7x21 pocket binoculars because I wanted a more compact daily carry binocular even though I own a Swarovski 10x25 CL pocket binocular. I also bought it because of the many rave reviews on Bird forum and other websites. However, when I looked through these the image is very jittery and shaky unlike my Swarovski CL pocket 10x25 . This surprised me because that is a 10X and this is a 7X I think it is because this binocular is so small and lighter weight maybe that I cannot get a stable relaxing view without image shake. I am 63 years old but I do not think my age has anything to do with the shake and jittery image. It is the small size and weight combination and not the build quality which is excellent as well as the image except for the shake just not usable at all. I also own a Kowa Genesis 8x33 no handshake either excellent image and wide field of view great quality binocular. I have also owned and sold a Leica Ultravid 10x32 and that gave me no handshake either wish I kept that Ultravid but the Kowa is just as good. Just my opinion what I experienced with the Curio 7x21 so do not believe all the hype on this pocket binocular. I suggest if you can to try one at a store if possible before you buy but I am returning mine for a refund.