Trying to decide on a larger refractor for imaging galaxies.

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Greg avatar

Hi all. A currently have a widefield refractor, a Carbonstar 150 newt and a Celestron C6. SCT. I’m looking for something easier to use than the C6 and more consistent for galaxies. I image with a 533mcpro and on a CGX mount. 50mm guide scope/220mini guide cam.

I should point out that I’m not talking about tiny galaxies under 10’ but looking at Telescopius I feel that galaxies larger than say 11’ should be within reach with a decent crop of the image.

I’m deciding between the ASKAR 120mm at 840mm f/l and the Astro-Tech AT 130 EDT at 910mm. I might even spring for the 130 EDX, but I’m not sure it’s necessary. I certainly welcome opinions on that too.

My biggest sticking point is that frankly, I don’t want to add a pier extension if at all possible. I’m hoping the CGX can handle the scope’s weight and dimensions without having to raise it or worry about it hitting tripod legs. Is that reasonable, or will any of these scopes be ok without a pier extension?

Thanks for your time.

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Tony Gondola avatar

I would go with the longest focal length you can get from your choices.

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