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So I finally got out last night (30th July) for my first ever observation with the Skywatcher 200P I've had collecting dust for about 2 weeks now!
The sky was cloud-free but with urban light pollution.
I really struggled to use the standard straight finderscope - I don't know how people cope with those: I needed yoga positions Back Bend, Table Top and the Camel just to get my eye even close! I'll try it some more but I imagine I'll be purchasing a RACI finder asap!!
By scanning with the main scope though I'm fairly sure I managed to find M13 at first. It didn't look quite like it does in "Left Turn at Orion" though - to get a similar-sized view of the Cluster I had the magnification set at 133x which is nearly double the view in the book for a Dobsonian under medium power (75x or 40'). I wondered whether this was more likely because the ambient light was drowning much of the size of the cluster out?
It was really impressive to see nonetheless!
Then I tried to find Andromeda... Which I thought I had, but it wasn't nearly as large or impressive as the book suggested. I was far more impressed with the Hercules Cluster through both viewfinders, in terms of size and clarity. Is there a chance that I hadn't in fact found Andromeda but some other Galaxy, or could it be a problem with the urban lighting/ difference in direction I was looking that made the difference?