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Message: <blockquote data-quote="Binastro" data-source="post: 3227566" data-attributes="member: 111403">. Hi Stan,Canon undoubtably know from serial numbers what their binoculars are, at least Canon in Japan. But having had dealings with Canon, it may be that they won't tell you. Nor are you likely to find out how many different variations there have been with the 10×30. I think there have been many.I have only handled two 8×25 IS Canon binoculars, one about eight years old which I think had variable prisms and the other a 2014 model which had a tilting mechanism. You can see by looking in the front of the binocular with a torch, which method is employed. I don't know when they changed the stabilisation method, probably sometime in the last eight years, maybe quite recently?Looking at a 15-year-old Canon 10×30, there is no optical window and no filter thread. I don't know if all the 10×30s that have been made are the same.Looking at a 12-year-old 18×50 there are optical windows and filter threads. Again, I don't know if all the 18×50s are the same.An eight-year-old 8×25 has optical windows. Again I don't know if all the 8×25s are the same.These ages are approximate.Perhaps owners of various Canon image stabilised binoculars can say whether their binoculars have optical windows and filter threads or not.I don't know if anyone has written a history of these Canon image stabilised binoculars, in a way they stay the same, but there are probably many variations only known to the factory.</blockquote>

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