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<blockquote data-quote="WayneF" data-source="post: 199511" data-attributes="member: 12496">As Jake explained, larger pixels typically have less noise problems, and smaller pixels typically have more noise (more noise means higher ISO is less acceptable).&nbsp; Not exactly a factor of resolution, but it certainly can affect the suitability of the&nbsp; image.Your Excel chart seems right, no question.&nbsp; However, it discusses resolution on the sensor, which size we never examine.&nbsp; Instead we must enlarge it, to video screen size, or to print size, DX enlarged 1.5x more than FX, but vastly larger than thumbnail size.&nbsp;&nbsp; Which then, to provide this larger view, the COUNT of pixels becomes the important factor (regarding their spacing in that larger view).Said another way:D7100 -&nbsp; 6000x4000 pixels (24 mp) <a href="http://nikonites.com/products/dslr-3/d800-227/" target="_blank">D800</a>&nbsp; - 7360x4912 pixels (36 mp)For both printed at 300 dpi, (and assuming we have framed the same image):the D7100 image prints 20x13.3 inchesthe D800 image prints 24.5x15.4 inches (around 22% larger - 1.22 is squre root of 1.5 crop)

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[QUOTE="WayneF, post: 199511, member: 12496"] As Jake explained, larger pixels typically have less noise problems, and smaller pixels typically have more noise (more noise means higher ISO is less acceptable). Not exactly a factor of resolution, but it certainly can affect the suitability of the image. Your Excel chart seems right, no question. However, it discusses resolution on the sensor, which size we never examine. Instead we must enlarge it, to video screen size, or to print size, DX enlarged 1.5x more than FX, but vastly larger than thumbnail size. Which then, to provide this larger view, the COUNT of pixels becomes the important factor (regarding their spacing in that larger view). Said another way: D7100 - 6000x4000 pixels (24 mp) [URL="http://nikonites.com/products/dslr-3/d800-227/"]D800[/URL] - 7360x4912 pixels (36 mp) For both printed at 300 dpi, (and assuming we have framed the same image): the D7100 image prints 20x13.3 inches [LEFT][COLOR=#000000]the D800 image prints 24.5x15.4 inches (around 22% larger - 1.22 is squre root of 1.5 crop) [/COLOR][/LEFT] [/QUOTE]

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