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Well done Frank.
Now you have all the gear it’s time to refine things. My first suggestion to you would be to back down your sub length significantly. At 1500mm focal length you are learning the hard way. That’s not to say it’s wrong by any stretch. There is clearly a lot of movement going on in your tracking shown by your star shapes and you should probably try to refine that before trying to push such a long focal length for such a long time. I would suggest trying to get round stars with 1min subs first. With that mount in calm conditions ( no wind or vibrations ) and with good balance, you should almost be able to get that unguided. Then work on your guiding from there. Get nice clean guiding graphs and then bump up the exposure time.
Another suggestion would be to get hold of a focal reducer. Maybe a 6.3 ? That will take your focal length down to a much more manageable 945mm. It will also reduce the required exposure time becoming f6.3 rather than f10. It will give you a wider field of view which will allow you to capture more of the brighter nebulae while you hone in your skills.
This hobby is so rewarding at each stage of your progress. Please don’t take my comments as criticism because they are entirely intended to be constructive. You’ve obviously taken a big step forward so I’m hoping I/we can help you to take the next one.
Cheers
Ryan
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