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Message: <blockquote data-quote="brocknroller" data-source="post: 1653817" data-attributes="member: 665">Edz,Yes, word has gotten around. I mentioned this in post #10. IMO, the greatest innovation of the 10x IS L was it had the largest exit pupil configuration ever made in an IS bin. The other Canons, as well as other brand IS bins, all have exit pupils of around 3mm. I really liked the 10x30 IS, but found the 3mm exit pupil lacking under dim lighting conditions, which happens here often in the late fall. To find that the effective aperture of the 10x IS L was closer to the midsized Nikon 10x35 EII than the full sized 10x42 SE was disappointing. Surely the designers realized that the baffle would reduce the effective aperture. Could it be that the 4.2 mm exit pupil of a 10x42 posed too great a challenge for Canon's IS technology or is there  some other logical reason for the baffle? Cut down on stray light, perhaps? Why do you think the designers put it there?</blockquote>