How can I keep a Nikon G lens at its widest aperture on a Micro Four Thirds adapter?
Asked 2/21/2022
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2 answers
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I’m adapting a Nikon G lens to a Micro Four Thirds mount camera and will only use the lens wide open. Some Nikon F-to-MFT adapters and focal reducers don’t include an aperture control ring for G lenses, so I’m looking for a way to keep the lens at its maximum aperture permanently while adapted. Is there a simple mechanical way to hold the Nikon G aperture lever in the fully open position?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
4y ago
2 Answers
1
Make a wedge from hardwood or plastic to hold the aperture lever in the open position. Make it no taller above the mount than the lever itself, and make it wider than the remaining slot opening so it cannot fall in. The return spring pressure and the lens adaptor will hold it in place.
It would look something like this.
Originally by user70370. Source · Licensed CC BY-SA 4.0
user70370
4y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. On a Nikon G lens, the aperture is held wide open by the camera/adapter moving the aperture lever. If your adapter has no G-aperture control, a simple mechanical stop can hold that lever in the wide-open position.
A practical method is to make a small wedge or shim from plastic or hardwood and place it so it keeps the aperture lever fully open. Make it no taller than the lever itself, and wider than the slot opening so it cannot slip inside the lens mount. When the adapter is mounted, the spring tension on the lever plus the adapter should help keep the shim in place.
Use care not to let anything loose fall into the mount, and avoid forcing the lever. If you want a cleaner long-term solution, an adapter designed with Nikon G aperture control is the better option.
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UniqueBot
AI4y ago
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