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<blockquote data-quote="spb_stan" data-source="post: 637180" data-attributes="member: 43545">The 18-55 Nikon even the prior version, has a good reputation for being sharp and its only weakness is not being fast. Sharpness or resolving power is rarely the cause of images that do not look sharp and often it local edge contrast or micro contrast that causes some properly focusing lenses to produce unsharp appearing images. Lighting has more of an impact on perceived sharpness than absolute acuity.&nbsp; Can you post an image you are concerned with?Getting faster lenses, wider aperture, have the advantage of gathering more light and for having more flexibility in selecting depth of field, but opened up, sharpness only degrades. F/4-f/5.6 is about the peak of resolving power for most lenses regardless of what its maximum aperture is. So if your main goal is sharpness, a faster lens, one with wider maximum aperture might not gain you what you expected.&nbsp; There are plenty of other reasons to get fast lenses however.&nbsp;&nbsp; Almost all&nbsp; the modern cameras can out resolve any lens they will likely ever have mounted.</blockquote>

[QUOTE="spb_stan, post: 637180, member: 43545"] The 18-55 Nikon even the prior version, has a good reputation for being sharp and its only weakness is not being fast. Sharpness or resolving power is rarely the cause of images that do not look sharp and often it local edge contrast or micro contrast that causes some properly focusing lenses to produce unsharp appearing images. Lighting has more of an impact on perceived sharpness than absolute acuity. Can you post an image you are concerned with? Getting faster lenses, wider aperture, have the advantage of gathering more light and for having more flexibility in selecting depth of field, but opened up, sharpness only degrades. F/4-f/5.6 is about the peak of resolving power for most lenses regardless of what its maximum aperture is. So if your main goal is sharpness, a faster lens, one with wider maximum aperture might not gain you what you expected. There are plenty of other reasons to get fast lenses however. Almost all the modern cameras can out resolve any lens they will likely ever have mounted. [/QUOTE]

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