Ditto. I was going to suggest you should look into a Maksutov Newtonian as I think f/8 is a poor choice for your choice of camera. There are a few to choose from - Skywatcher, Orion, and Intes or Intes-Micro, apertures from 125 to 203mm and focal ratios between f/4 and f/8.
You'll need to select one with resolution appropriate to the pixel spacing on your camera sensor.
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