Quote:
Originally Posted by David Fitz-Henr
A nice image Marc - pity about the elongated stars in the top right. Are you sure it's field rotation? It would be intersting to see some test shots each side of focus. If it is tilt, you will see the star shapes change through focus (sagital / tangential elongation).
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Thanks David. Yeah bit of both. The whole field is tilted but I have field rotation already in half of the subs. Getting there with collimation and what not. I have learnt so much about SCTs in the past 3 weeks that I have been playing with the Hotech kit. But it has been very time consuming and quite frustrating at times
. The design for the primary attachement is the last hurdle. Now I have everything else tight and quite easily adjustable it's the only thing I have no clear control over. Might be more suited as a summer job. Too cold now. If I could find a way to image a small artificial field of stars that would be great then I could do this on the bench like the rest of it. Would a laptop picture at a distance work? I'm talking only about field flatness and tilt, not diffraction rings as in start testing?