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<blockquote data-quote="rbrownphoto" data-source="post: 55998" data-attributes="member: 9562"><p>Hello, I am a Technical Rep for Sigma.&nbsp; I checked our compatibility charts for the D3100 and the lens would be fully compatible.&nbsp; If you would like a 70-300 Sigma lens, I would suggest the newest version.&nbsp; There are three versions of the newest lens.&nbsp; The least expensive is the basic DG lens.&nbsp; This will run $169 at B&amp;H.&nbsp; The next level is this lens with the APO designation.&nbsp; The APO stands for Apochromatic and has optical enhancements to reduce chromatic aberrations.&nbsp; This will give a higher level of image quality.&nbsp; This price would be $239.&nbsp; The highest level is the DG OS lens.&nbsp; This lens includes the Optical Stabilization resulting in sharper images as well as the SLD glass that is a higher reduction of chromatic aberration.&nbsp; This price would be $359.&nbsp; All three are going to be the fastest AF and the highest optical quality yet!&nbsp; If you have any questions, please email me at <a href="mailto:rbrown@sigmaphoto.com">rbrown@sigmaphoto.com</a></p></blockquote><p></p>

[QUOTE="rbrownphoto, post: 55998, member: 9562"] Hello, I am a Technical Rep for Sigma. I checked our compatibility charts for the D3100 and the lens would be fully compatible. If you would like a 70-300 Sigma lens, I would suggest the newest version. There are three versions of the newest lens. The least expensive is the basic DG lens. This will run $169 at B&H. The next level is this lens with the APO designation. The APO stands for Apochromatic and has optical enhancements to reduce chromatic aberrations. This will give a higher level of image quality. This price would be $239. The highest level is the DG OS lens. This lens includes the Optical Stabilization resulting in sharper images as well as the SLD glass that is a higher reduction of chromatic aberration. This price would be $359. All three are going to be the fastest AF and the highest optical quality yet! If you have any questions, please email me at [email]rbrown@sigmaphoto.com[/email] [/QUOTE]

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