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Message: <blockquote data-quote="kabsetz" data-source="post: 1649279" data-attributes="member: 10167">Ron,Thanks for sharing your experiments and thoughts on IPD. Your experimentation and calculations are worth much more than a thousand speculations, and I will certainly start being more methodical about IPD adjustments as a result of reading them. I have been rather particular (or thought I was) about getting the right setting, but since I have mainly used the ruler method for measuring my IPD, I probably have a flawed impression of what my exact figure is. However, I have for a rather long time experienced that very small adjustments in IPD make what for me are significant enough changes in the resultant image quality. This was especially clear when I was almost daily using the 15x50 Canon IS with its smallish exit pupil, where whenever someone else tried the binoculars and messed the IPD setting, it could take me quite some time to get it re-adjusted to my satisfaction despite my having indexed my settings on the binocular body.I will try the mirror-method to see if it leads me to change the settings I usually end up with. Also, would like comments on another adjustment method I have sometimes tried. The drawback is that it needs to be done in relative darkness, but the idea is to find a bright star/distant streetlight or other very bright glitter point suitably close to infinity distance, and then defocus the binocular to the point where the diffraction ring pattern edge almost meets the field stop (very nearly fills the entire field). It is now easy to see whether the blob is centered for either eye or both, and when it is, the IPD is correct.Kimmo</blockquote>

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