Quote:
Originally Posted by Shiraz
......The pixel size determines how big an area of sky is looked at in each of those directions .........
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This very confusing/misleading. Starlight does not come in at angles. The wave front is perfectly parallel to the aperture...any photons left or right simply don't enter the telescope.
Once the light is past the aperture of the telescope, then the telescope optics do what they do..reflect/refract to form the image.
Sure, faster telescopes put the focused image over a smaller area....nailing down how much a difference that makes is the sticking point.