Hello all,
Very newbie here!!
As the title suggests I was out last night viewing Jupiter using a very basic National Geographic Dobson telescope. After spending ages trying to get Jupiter into my field of view, I managed to eventually get there. I found it difficult to keep the telescope steady. Aside from this, i eventually managed to get a great view. I was using a 2x Barlow lens, which came with the scope. However, i found that there was a shadow of ball attached to a screw cutting across my view of the planet, which was really annoying. I presume this is not normal, but can't work out how to get rid.
Help much appreciated!!
Thank you