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<p>[QUOTE=&quot;Johntomk, post: 1840567, member: 57110&quot;]There&#039;s some great advice here. As ldhair mentioned, the 105 mm sigma is a popular lens. I&#039;m using the 40mm nikon macro lens which I just got for christmas. It&#039;s definitely not an ideal length for macro, but the 105mm is beyond my price range. Make sure you have very good lighting. You can buy or make a light box. It will help diffuse the light properly. Just google &quot;light box for macro&quot; and you will see how to make one from a cardboard box. Using proper lighting will make a huge difference. As others mentioned, using a tripod or copystand is pretty much a must. As for focusing, use a live view to zoom in and manually focus. Autofocus really won&#039;t cut it with macro. You will also want to use a pretty narrow aperture. If the aperture is too wide, you will have an extremely shallow depth of field. You won&#039;t need a very large field for coins, but if it is too small it will make getting sharp pictures very challenging. For instance, if you use a 105mm lens 12 inches away from your subject and an aperture of f/8, you will have a depth of field of just 7/64ths of an inch. At f/22 you will have 19/64ths of an inch. Using an aperture this narrow will mean you will need a lot of light.[/QUOTE]</p><p><br /></p>

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