Quote:
Originally Posted by LewisM
Concerned now that I won't be parfocal with this set, as they all seem to tighten up in different positions etc.
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Isn't parfocality associated with the relative thicknesses of the filters? Provided that the filters are orthogonal to the axis of light, a few mm either way shouldn't make a difference (if I remember my first year optics lectures correctly).
Quote:
Originally Posted by LewisM
Mike, your blasted curse hit here today - the Westerlies struck, and not even worth considering imaging, even though the sky is perfect. GRRRRRR
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Wind? What wind?
I love guiding with adaptive optics...
