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Originally Posted by bmitchell82
howdie all, question for the more knowledgable.
having a big F ratio allows a narrow field view aka taking a photo you get more aparent resolution and more detail but at the expense of FOV.
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f15 gives narrow field of view, resolution is dependant on aperture and quality of optics
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having a low F ratio allows wide field shots
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what you get in a telescope is what you get , if you want to get in and tight longer Focal length is required. NOTE--- you will get to a point where you are fighting seeing and sampling rates theres not uch point in having 100 pixels per arc sec if the seeing is poor.
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My question is if i where to stop down a 10" to say a 6" apart from the obvious factor that this will change the F ratio and subsiquently decrease the light capture, will this serve the same as having a high F ratio to do galaxy imaging or am i just reducing the light capturing ability with no gain
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if you cut of a leg will you run faster ?