Peter,
It’s best to be oversampled than undersampled in Astrophotography
Oversampling gives you the flexibility of using many post processing tools like Binning, Deconvolution and Star reduction etc…
Using my 2600MC with my quiver of Newts provides an image scale of between 0.86 arc sec per pixel and 0.62 arc sec per pixel (oversampled)
My oversampled data provides so much flexibility in my post processing software, Startools
You really want to try and avoid undersampling with your set ups, unless your imaging with short focal lengths.
Cheers
Martin
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