This may have been asked before but I've searched the forum and can't find anything. So....I remember seeing Canon focus confirm T mounts on fleabay but I just had a look and can't see any. I have a Sony Alpha 200 mounted on my celestron 80ed and just for convenience (and my appalling eyesight ) I would like the accuracy of focus confirmation. Anybody got any experience or options that I might try? Cheers John