Quote:
Originally Posted by torsion
Hi, Sorry for your troubles.
I have not much experience at all (only dreaming of such a set up), but as a sanity check you should try (unless you already did) calibrate your guide error and elongation etc in arc-seconds.
Also, try to work out in what 'axis' the elongation is (sorry you mention the 'axis' in your post, would that be 'vertical'?).
cheers,
Bram
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Thanks Bram,
guiding error is between 0.1 - 0.6 of a pixel for 1.2 arcsec / pix. this is 0.12 - 0.72 arcsec of error. translate this to the imaging chip with an image scale of 0.73 arcsec / pix and thats an error of 0.16 - 1 pix.
These guiding errors have given me round stars before. so i dont think its the guiding. My seeing isnt as good as the guiding error either.
And the axis is a mix of 50 % RA and 50% Dec as the x axis on the chip is in line with Dec and the y axis RA.
thanks
Josh