 Karen H. Mullen |
Digital focus trouble I am trouble focusing my Nikon D100. I have pretty good vision - only a slight problem with distance. However, since I have switched to digital photography I have trouble with getting my portraits tack sharp, unless they are pretty close up. My worst problem is with groups. I always use a tripod, I use the smallest aperature possible, I have a VR lense (doesn't seem to make any difference) and I've tried both manual and autofocus, and neither seem to work! Any advice? Is this just a result of pixels vs. grain? thanks, Karen
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Jon Close |
Digital cameras have an "anti-alias" filter over the sensor that lessens pixelation and moire, but at the expense of sharpness. Are you applying post-processing sharpening, like Photoshop's Unsharp Mask? If not, you should. Digital point & shoots are intended to print or email pictures without any editing, and so do sharpening in-camera. DSLRs default to little or no in-camera processing giving the user better control of the image in advanced editting programs. I'm not so familiar with the D100, but I'd expect that it has controls that allow you to adjust its Contrast/Sharpness/Saturation settings so that you can get sharper "ready to use" .jpgs. If there is an area of tack-sharpness, but it's not where you thought you focused (like a person's ear instead of the eyes that you focused on), then you might have a back-focus or front-focus AF calibration problem that will require having your camera and/or lens serviced.
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Karen H. Mullen |
Thanks Jon - My problem is the focus area is missed - as you described. Most commonly the focus area is behind the subject, nearer or farther depending on the subject distance. Karen
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