Thanks Merlin.
Am I correct in assuming then that you would not need to guide better than 3 arcseconds? If you are guiding better than 3 you would just be chasing atmosphere refraction.
My set up is a 714mm 102 refractor and the imager will be an STF 3800m pixel size is 5.4 microns. Un binned gives me 1.56 ar/px but that will be two high res for my seeing so I'll need to bin this to 2x2 making it 3.12 arcseconds per pixel. So am I correct in thinking that my guiding doesnt need to be better than 3.12 due to my imaging rig? But then how does my local seeing play into this.
I'm just starting to get my head around all this its a bit of a can worms
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Thanks