Recently I wanted to use the live view with my 300mm f/4 AF-S and when I pressed the shutter it did nothing (live view did not start).

The live view works perfectly with the 24-85mm AF-G f/3.5-4.5 (FX lens as well).

I checked in the manual but did not find any clue if it is a normal behaviour or not.


1 Answer 1


I think I may have your answer. On the D300 and D700, if you are using lenses that have an aperture ring LV is disabled unless a certain menu setting (f7 on a D300, f9 on a D700) is set the correct way ("Sub-command dial OK").

Your 300mm has an aperture ring; your 24-85mm does not.



for the setup information.

  • \$\begingroup\$ Great catch. Something really new for me to learn :) \$\endgroup\$
    – Itai
    Dec 1, 2012 at 21:43
  • \$\begingroup\$ Thanks this address well my question, but another question remains: I tested with the same settings (driven by aperture ring) with older AI-S lenses and the Live-View is working well with them. \$\endgroup\$
    – рüффп
    Dec 8, 2012 at 13:21
  • \$\begingroup\$ I think the camera only cares when the lens has an embedded cpu that can tell the camera what the lens characteristics are. AI-S lenses have no cpu, are treated as 'dumb' lenses that, depending on the camera, reduce your metering options to few or none. Non-CPU lenses evidently also don't trigger the LV limitation. \$\endgroup\$
    – BobT
    Dec 10, 2012 at 3:33
  • \$\begingroup\$ Then it looks a bit stupid to disable (in this configuration only) the LV for the most recent lenses with ring and cpu, isn't it? The one without CPU are working well in LV. \$\endgroup\$
    – рüффп
    Mar 5, 2013 at 22:01

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