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Message: <blockquote data-quote="spacepilot" data-source="post: 2007694" data-attributes="member: 76307">Kevin, my EDG's serial number is 700200+, so it was probably produced much later than yours. This evening, I took out the Leupold Golden Ring HD, my backup for the EDG, and was ready to put the strap on and bring it to tomorrow's CBC. But I thought I would try the EDG again. Because the diopter setting was already at the last + mark last Sunday, I thought the diopter would've been too off today that there's not enough adjustment range for me to get a good focus. But it didn't drift as much as I expected. I can still get it to focus within whatever is left in the adjustment range. I'll store it upside down tonight (I think it might slow down the drifting if it's gravity on the focusing element that's pulling the diopter off), and check it tomorrow morning to decide if I'm going to use it for the CBC.Jerry, I was concerned about the IPD tightness when I first got my EDG. But after the first couple weeks' of playing around, I haven't found the need to readjust the IPD in the last month, so I don't think it's the IPD adjustment that changed the diopter. Did your tightening of the IPD change the focus tension at all?I started this thread hoping for some insight as to how, in general, the control and optical components are connected mechanically, and why there's room for drifting of such magnitude to occur. That's why I put it in the general forum. But seeing how this thread has grown more EDG-specific, I think it's appropriate to move it to the Nikon subforum.Ning</blockquote>

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