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Old 30-09-2009, 08:18 PM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Sydney
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Quote:
Originally Posted by sjastro View Post
Shooting at lower f/ratios (lower FL) results in a larger pixel scale and camera noise less obvious on faint objects. The fainter nebulosity may appear to be smoother but you are not going any deeper.

Regards

Steven
Agreed. Visually the faint stuff should look brighter then. 11" at F/2 ot F/1.8 is approx 510mm FL with an image scale of 3.2arcsec/pixel with the QHY8. I calculated the FOV to be just a bit bigger than my 5" newt at F/5
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