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Message: <blockquote data-quote="GYRob" data-source="post: 1725470" data-attributes="member: 38948">well im reading in other forums that the mk4 is at least as good as the mk3 although some are saying it is better .Some are having real problems with the mk4 too and thats a bit worrying, moreso in that some have sent them back to be looked at and they still wont work .Iv now crossed it of my list for now not just because of the problems but it is only a stop and a half better than the 7d. imo it should be a stop more than that .From what iv seen up to iso 800 / 1600 the 7d is close to the mk4 in noise and it would be very rare i would go above this.Rob.</blockquote>