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Sigma 150-500 OS initial impression
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<blockquote data-quote="BackdoorArts" data-source="post: 145120" data-attributes="member: 9240"><p>Realize that when you are looking at RAW, you're looking at basic information with no sharpening or other enhancements to the image that might normally be applied to a jpeg. Realize sharpening will not fix a blurry image, but it will make a properly focused image look all that much sharper.</p><p></p><p>There are threads on here for focus calibration (do a search on those words). Zooms really cannot be calibrated for the full length of the lens as the calibration may vary across the length. I did mine at about 450mm (at minimum aperture) since that's where I do most of my shooting. D7000's are notorious for having a small backfocus issue (sharp focus is immediately behind where the camera locked) and I found I needed to set most of my lenses to somewhere between +8 and +12 on that camera. Not a defect, per se, unless all your lenses are at +20 and still not sharp, in which case I'd send it back to Nikon. But I assume you'd have seen that by now.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 145120, member: 9240"] Realize that when you are looking at RAW, you're looking at basic information with no sharpening or other enhancements to the image that might normally be applied to a jpeg. Realize sharpening will not fix a blurry image, but it will make a properly focused image look all that much sharper. There are threads on here for focus calibration (do a search on those words). Zooms really cannot be calibrated for the full length of the lens as the calibration may vary across the length. I did mine at about 450mm (at minimum aperture) since that's where I do most of my shooting. D7000's are notorious for having a small backfocus issue (sharp focus is immediately behind where the camera locked) and I found I needed to set most of my lenses to somewhere between +8 and +12 on that camera. Not a defect, per se, unless all your lenses are at +20 and still not sharp, in which case I'd send it back to Nikon. But I assume you'd have seen that by now. [/QUOTE]
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Sigma 150-500 OS initial impression
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