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Thats a small FOV and a high resolution but probably what you want/need for pretty pictures :-) I don't image under 1.3"/pixel (ST-8 Bin 1) and my FOV is about 3x yours. My seeing is typically 3-4" (or the wind makes the seeing appear 3-4") but I can sometimes get to 2" - but thats pretty rare. With the ST-9 I image at f/5.6 (2"/pixel).
My guidescope FOV is reasonably large as well producing a scale of around 3.0"/px
Cheers
David
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