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<blockquote data-quote="aroy" data-source="post: 413884" data-attributes="member: 16090">Every lens has a minimum focusing distance. Varies from 10&quot; for some macros to over 24&quot; for 200mm.So keep that in mind while trying to focus.In your case, I would suggest the following. Take the fossil out in open bright light. Put it on a dull back ground - wooden porch or plain soil will do. As suggested set the camera to - ISO 100, Aperture Priority, F11. In reasonable light you should get speed of between 1/100 and 1/500. . If you are using a zoom, then set the lens at maximum focal length. Now stand 2 feet away from the fossil and try to get it in focus. If successful, then keep moving closer till you can no longer focus. If not keep moving back till you get the focus.That is the minimum focusing distance.If you find the image too small then you have to use a lens with more magnification. Here are some magnifications. 18-55 at 55mm = 0.31X with AF, 0.36X manual focus. 60mm F2.8G macro = 1x. 105mm F2.8G macro = 1x. 105mm F2.8 AIS = 1.2x with extension tube, 2x without</blockquote>

[QUOTE="aroy, post: 413884, member: 16090"] Every lens has a minimum focusing distance. Varies from 10" for some macros to over 24" for 200mm.So keep that in mind while trying to focus. In your case, I would suggest the following . Take the fossil out in open bright light . Put it on a dull back ground - wooden porch or plain soil will do . As suggested set the camera to - ISO 100, Aperture Priority, F11. In reasonable light you should get speed of between 1/100 and 1/500. . If you are using a zoom, then set the lens at maximum focal length . Now stand 2 feet away from the fossil and try to get it in focus . If successful, then keep moving closer till you can no longer focus. If not keep moving back till you get the focus.That is the minimum focusing distance. If you find the image too small then you have to use a lens with more magnification. Here are some magnifications . 18-55 at 55mm = 0.31X with AF, 0.36X manual focus . 60mm F2.8G macro = 1x . 105mm F2.8G macro = 1x . 105mm F2.8 AIS = 1.2x with extension tube, 2x without [/QUOTE]

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