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Message: <blockquote data-quote="kabsetz" data-source="post: 1557078" data-attributes="member: 10167">Maybe I have unusually shaky hands, but after nearly a decade of using IS bins as my personal birding (and other viewing) tools, I must say that if I were surveying anything where I didn't want to miss details or where I needed to count something, I would always choose an IS were it an option. The only exceptions are viewing butterflies, where less magnification, better DOF and quicker focus are overriding priorities and where Canon's IS cannot quite keep up, and very quick situations in birding, where the slight IS lag prevents its effective use and a premium 7-8x can momentarily be better for securing an ID than the slow-focusing and somewhat cumbersome 10x42 IS L I currently use. Of course, the 10x30 is not cumbersome...Kimmo</blockquote>