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Post by Deleted on Mar 27, 2014 2:01:53 GMT
Hi all have been planning to do this for a while now and finally got round to it last night. The main reason is that gotos are not great at times with mounts especially with using a video camera FOV. Usually I do a one star alignment which is fine for visual and not bad for cams but sometimes even the moon is out of finder range even with a perfect polar alignment. When I was aligned there was never a Polaris in the scope view so I followed Dions video (Astronomyshed) to fix it. I got it done in an hour or so. This can be done in daytime on a distant object, but as it was clear for an hour or two I tried with Polaris. It is harder to do in the dark but worth it. My final test was to manually rotate the scope RA from 3 to 9 o'clock and watch Polaris in the eyepiece steady with stars rotating around it. Hopefully the next time out should be good. The rear of my scope after this needed to be raised at the mirror end by about 2-3mm but makes a big difference. Heres a link to the video, www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CC4QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWatdQlPp22Y&ei=in0zU_OiNsq3hQea4IGoAw&usg=AFQjCNHjN3D8pmmmXuAMdZlt_x9h4STR5Q&bvm=bv.63808443,d.ZG4
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Post by Dragon Man on Mar 27, 2014 6:07:50 GMT
Good Video thanks Carl.
Fortunately, the Skywatcher EQ Synscan mounts account for Cone Error by using 3 star alignment feature. A 2 star alignment is very accurate, but the 3 star alignment allows for Cone Error if done per the User Manual instructions.
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Deleted
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Post by Deleted on Mar 27, 2014 8:06:22 GMT
Hi all have been planning to do this for a while now and finally got round to it last night. The main reason is that gotos are not great at times with mounts especially with using a video camera FOV. Usually I do a one star alignment which is fine for visual and not bad for cams but sometimes even the moon is out of finder range even with a perfect polar alignment. When I was aligned there was never a Polaris in the scope view so I followed Dions video (Astronomyshed) to fix it. I got it done in an hour or so. This can be done in daytime on a distant object, but as it was clear for an hour or two I tried with Polaris. It is harder to do in the dark but worth it. My final test was to manually rotate the scope RA from 3 to 9 o'clock and watch Polaris in the eyepiece steady with stars rotating around it. Hopefully the next time out should be good. The rear of my scope after this needed to be raised at the mirror end by about 2-3mm but makes a big difference. Heres a link to the video, www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CC4QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWatdQlPp22Y&ei=in0zU_OiNsq3hQea4IGoAw&usg=AFQjCNHjN3D8pmmmXuAMdZlt_x9h4STR5Q&bvm=bv.63808443,d.ZG4 Great post Carl, I always wondered what cone error was and now it's much clearer! Now the warmer longer evenings with light are approaching I'm planning to learn how to set up in EQ mode so this will be very useful info.
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