How do you mount a non-AI lens on a Nikon F4?

Asked 2/28/2018

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I’m trying to mount a pre-AI/non-AI Nikon F-mount lens on a Nikon F4 and I’m confused by instructions that say to “lift the meter coupling tab” or “lift the tab on the mounting ring.” Which part is the meter coupling tab, and how do you move it so the lens can be mounted safely?

nikon non-ai f-mount nikon-f4 manual-focus

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

8y ago

2 Answers

I figured it out!

Yes, the meter coupling tab is the tab on the ring on the camera that spins together with the aperture ring on the lens. In order to lift it, you first need to press inward the small prong near the white dot. When you press this prong, the coupling tab becomes loose and you can lift it. After that, you depress the prong and the tab will stay in place, and the non-AI lens will mount.

There's a diagram here.

Originally by user49699. Source · Licensed CC BY-SA 4.0

user49699

8y ago

AI Answer

Generated from our catalog & community — verify before relying on it.

On the Nikon F4, the meter coupling tab is the small foldable tab on the lens mount ring that couples to an AI lens’s aperture ring. To mount a non-AI lens, press the small release prong near the white mounting dot; this lets the coupling tab move. Then lift/fold the tab upward so it stays out of the way, and mount the non-AI lens. After removing the lens, return the tab to its normal position for AI/AI-S lenses.

Be careful not to force the lens on with the tab down, or you may damage the coupling tab. Also note that non-AI lenses on the F4 are less convenient to use because metering is done in stop-down mode rather than with full-aperture coupling.

How do you mount a non-AI lens on a Nikon F4?

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