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Thanks Martin, that's very relevant.
The reason I'm considering the 178MM is because of the hope that it would be suitable for planetary, but also the larger FOV would let me capture galaxies as well. The two images I've attached are from an imaging toolbox site, and are both of NGC613. The larger FOV is the 178MM. It would be amazing to be able to get images like this. My question is, is this achievable in real-world conditions, which for me would be taking my 180Mak and NEQ6 Pro to a reasonably dark site?
I appreciate that this is not a wide-field setup, but maybe a little galaxy-hunter?
Thanks for the input so far.
Stephen
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