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<blockquote data-quote="captain birdseye" data-source="post: 667050" data-attributes="member: 21047">As soon as I started comparing results from the Nikon against the Sigma I saw that the Nikon was noticeably sharper even wide open and right through its range whereas the Sigma was, at its best slightly softer and when used at its longest focal length even more so.Colour and contrast from the Nikon were a little nicer and so was its bokeh.The Nikon, even after 18 months of good use has no lens creep at all, the Sigma always had lens creep which was noticeable when pointing it upwards.The Nikons AF speed is about the same as the Sigma is (unless tweaked with the USB dock ) but the Nikon is far more accurate and consistently so where the sigma could be a bit hit and miss which required me to take a lot of &quot;insurance&quot; shots of the same subject to ensure I had a sharp image but, even then it was prone to letting me down.I found that the OS of the Sigma seemed to shift the focal point whereas I do not have this problem with the VR of the Nikon.All the time I owned the Sigma C I was never blown away by its results unless I was shooting in really good light, close up and with the lens at under 400mm where with the Nikon I was elated at how sharp the images were at any focal length and distance.</blockquote>

[QUOTE="captain birdseye, post: 667050, member: 21047"] As soon as I started comparing results from the Nikon against the Sigma I saw that the Nikon was noticeably sharper even wide open and right through its range whereas the Sigma was, at its best slightly softer and when used at its longest focal length even more so. Colour and contrast from the Nikon were a little nicer and so was its bokeh. The Nikon, even after 18 months of good use has no lens creep at all, the Sigma always had lens creep which was noticeable when pointing it upwards. The Nikons AF speed is about the same as the Sigma is (unless tweaked with the USB dock ) but the Nikon is far more accurate and consistently so where the sigma could be a bit hit and miss which required me to take a lot of "insurance" shots of the same subject to ensure I had a sharp image but, even then it was prone to letting me down. I found that the OS of the Sigma seemed to shift the focal point whereas I do not have this problem with the VR of the Nikon. All the time I owned the Sigma C I was never blown away by its results unless I was shooting in really good light, close up and with the lens at under 400mm where with the Nikon I was elated at how sharp the images were at any focal length and distance. [/QUOTE]

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