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Hi Shane
Can you describe your equipment and procedure? Here is a brief description of my experiences in seeing the out-of-focus diffraction rings.
For my Vixen 4" f9 refractor, the rings become obvious when I plug in a 5mm eyepiece which is a magnification of x184.
For my Celestron C9.25 SCT, the rings become obvious when I plug in a 10mm eyepiece, which is a magnification of x235.
I can usually see rings even in bad seeing, although they are very messy and wobbly. I often find that the inside of focus rings are easier to see that the outside of focus rings. If you de-focus too much the rings can become quite faint.
Cheers
Dennis
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