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General Lenses
Note of Interest when Using DX specific Lenses
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<blockquote data-quote="aroy" data-source="post: 303632" data-attributes="member: 16090"><p>Actually diffraction causes a slight "spread" of focused object. Hence a point becomes a large blob as the diffraction increases. What that means is that as the pixel density increases, the "de-focussed" image or the "blob" becomes more apparent. So on a low density sensor a line will look sharp and narrow while on a sensor with twice the linear resolution it will appear a bit fuzzy.</p><p></p><p>We are assuming that the lens used has enough resolving power. In many cases older lower cost lenses have less resolving power and using them on high resolution sensors may not increase the image resolution, rather produce a more soft (fuzzy) image.</p><p></p><p>Though this is not a general rule, many DX specific lenses are designed to a cost, hence may not be as sharp as the mainstream FX lenses, which may cost five to ten times more.</p></blockquote><p></p>
[QUOTE="aroy, post: 303632, member: 16090"] Actually diffraction causes a slight "spread" of focused object. Hence a point becomes a large blob as the diffraction increases. What that means is that as the pixel density increases, the "de-focussed" image or the "blob" becomes more apparent. So on a low density sensor a line will look sharp and narrow while on a sensor with twice the linear resolution it will appear a bit fuzzy. We are assuming that the lens used has enough resolving power. In many cases older lower cost lenses have less resolving power and using them on high resolution sensors may not increase the image resolution, rather produce a more soft (fuzzy) image. Though this is not a general rule, many DX specific lenses are designed to a cost, hence may not be as sharp as the mainstream FX lenses, which may cost five to ten times more. [/QUOTE]
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Note of Interest when Using DX specific Lenses
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