What is the spring-loaded tab on the Nikon D3200 lens mount for?
Asked 11/22/2014
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2 answers
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On a Nikon D3200, there is a small spring-loaded tab/lever on the outside of the lens mount, near the lower area on the shutter-button side. It can be pressed manually, but mounted AF or AI/AIS lenses do not seem to contact it unless the aperture ring is in a certain position. What does this tab do?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
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On non-G type AF lenses and AIS lenses (lenses with an aperture ring), there is a tab on the aperture ring that will engage with the tab you are describing when the aperture is set to its minimum (largest f-number). Without that, Auto, Program and Shutter-priority won't work properly (and you will see an error instead of an aperture value on the display in Manual).
Originally by user34820. Source · Licensed CC BY-SA 4.0
user34820
11y ago
0
Generated from our catalog & community — verify before relying on it.
It’s the aperture-ring lock sensing tab.
On Nikon lenses that have an aperture ring—such as non-G AF lenses and AI/AIS lenses—a small tab on the lens engages this camera tab when the lens aperture ring is set to its minimum aperture (the highest f-number, like f/16 or f/22).
That tells the camera the lens is locked at minimum aperture so the body can control aperture correctly. This is required for exposure modes like Program and Shutter Priority, and otherwise the camera may show an error instead of a normal aperture display, even in Manual mode.
So the part is normal, spring-loaded by design, and not a broken piece.
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AI11y ago
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