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<blockquote data-quote="Bob Blaylock" data-source="post: 348382" data-attributes="member: 16749">I say again that <a href="http://imaging.nikon.com/lineup/dslr/d3000/compatibility.htm" target="_blank">the link which you provided earlier</a> says nothing about non-AI lenses.&nbsp; It does not include them “clubbed together” with AI lenses.&nbsp; All the lens types mentioned at that link are AI lenses.&nbsp; It lists the varieties of non-CPU lenses that are compatible with the D3000, all of which are AI lenses.&nbsp; It does not list any that are claimed to be completely incompatible therewith.&nbsp; If it did, and if Nikon was consistent with what it claims elsewhere, then the list of lenses claimed to be completely incompatible would include non-AI lenses.&nbsp; Here's page 169 of the manual that came with my D3200.&nbsp; Note that none of the lenses claimed to be completely incompatible are mentioned at your link to lenses compatible with the D3000.[ATTACH]109289[/ATTACH]&nbsp; And, as I said before, I disagree with Nikon on this point.&nbsp; You are correct, that the distinction between AI and non-AI lenses has to do with the mechanics of how the aperture ring is coupled to the camera, though type-G lenses, which do not even have an aperture ring, are apparently considered to be “AI” lenses.&nbsp; The D3??? cameras do not recognize any mechanical aperture ring coupling, so it really makes no difference to them whether the lens is AI or non-AI; and in fact, non-AI lenses seem to work just fine, with exactly the same limitations as non-CPU AI lenses.&nbsp; The “CPU” designation, of course, refers to the electronics in the lens, and the means of electronically communicating between the lens and the camera.</blockquote>

[QUOTE="Bob Blaylock, post: 348382, member: 16749"] I say again that [URL="http://imaging.nikon.com/lineup/dslr/d3000/compatibility.htm"]the link which you provided earlier[/URL] says nothing about non-AI lenses. It does not include them “clubbed together” with AI lenses. All the lens types mentioned at that link are AI lenses. It lists the varieties of non-CPU lenses that are compatible with the D3000, all of which are AI lenses. It does not list any that are claimed to be completely incompatible therewith. If it did, and if Nikon was consistent with what it claims elsewhere, then the list of lenses claimed to be completely incompatible would include non-AI lenses. Here's page 169 of the manual that came with my D3200. Note that none of the lenses claimed to be completely incompatible are mentioned at your link to lenses compatible with the D3000. [ATTACH=CONFIG]109289._xfImport[/ATTACH] And, as I said before, I disagree with Nikon on this point. You are correct, that the distinction between AI and non-AI lenses has to do with the mechanics of how the aperture ring is coupled to the camera, though type-G lenses, which do not even have an aperture ring, are apparently considered to be “AI” lenses. The D3??? cameras do not recognize any mechanical aperture ring coupling, so it really makes no difference to them whether the lens is AI or non-AI; and in fact, non-AI lenses seem to work just fine, with exactly the same limitations as non-CPU AI lenses. The “CPU” designation, of course, refers to the electronics in the lens, and the means of electronically communicating between the lens and the camera. [/QUOTE]

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