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<blockquote data-quote="Texas" data-source="post: 662170" data-attributes="member: 42267"><p>No Chip = yes - Focus Confirmation Dot (speaking for my D7100) using my 3 Nikkor MF lenses, AI and AI-S</p><p>(super valuable feature)</p><p></p><p>The chip, as added aftermarket, is not a computer chip, just an eprom "memory" which tells the camera firmware the F stop limit and focal length (and a few other things). Allows metering to work in all modes ASMP and reports the lens values in the exif's. </p><p></p><p> It is of course possible that cameras other than my 7100 may refuse to light the dot without more than basic eprom comms with the lens. </p><p></p><p> That would be just mean, no reason not to report the focus status, just because of a focus issue. Without a chip, the 7100 lets me punch in the widest f stop and FL in an internal memory. That's enough to allow full matrix and the other metering when in A or M mode (manual twist of aperture ring sets the A)</p></blockquote><p></p>
[QUOTE="Texas, post: 662170, member: 42267"] No Chip = yes - Focus Confirmation Dot (speaking for my D7100) using my 3 Nikkor MF lenses, AI and AI-S (super valuable feature) The chip, as added aftermarket, is not a computer chip, just an eprom "memory" which tells the camera firmware the F stop limit and focal length (and a few other things). Allows metering to work in all modes ASMP and reports the lens values in the exif's. It is of course possible that cameras other than my 7100 may refuse to light the dot without more than basic eprom comms with the lens. That would be just mean, no reason not to report the focus status, just because of a focus issue. Without a chip, the 7100 lets me punch in the widest f stop and FL in an internal memory. That's enough to allow full matrix and the other metering when in A or M mode (manual twist of aperture ring sets the A) [/QUOTE]
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