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8 x 50 Finderscope not working properly

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I recently got my new 8" Dob Telescope. I tried to see Jupiter yesterday. However, while aligning the Finderscope, I noticed that Jupiter wasn't a pinpoint image it appeared like a bright star and had 4 spikes coming off it. Looked much more like betelgeuse. I also tried to look at a star through it. It was better but I had to work my eye to make it a pinpoint.  I tried rotating the objective mirror backwards and forwards but that only worsened the image. It became a blob. The crosshairs were out of focus as well.

I do wear spectacles. I have myopia (-2.5) and astigmatism (-1.75).

Any help is greatly appreciated. I would really want to rectify this issue.



Edited by prabal276
Grammatical corrections
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