Can you adapt a Micro Four Thirds lens to a T-mount or C-mount astronomy camera?
Asked 3/1/2021
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I want to use a Micro Four Thirds lens, specifically a Mitakon Zhongyi Speedmaster 17mm f/0.95, on an Atik astronomical camera with a T-mount (M42x0.75). If that is not possible, could an adapter work for a C-mount camera instead? The lens would need to sit at the correct Micro Four Thirds flange focal distance of 19.25mm to retain infinity focus. Does an adapter like this exist, and is it physically practical?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
5y ago
2 Answers
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I have not seen any adapter to attach MFT lenses to other mounts. Even if they exist, you would lose infinity focus in most cases. (The FFD of MFT is 19.25mm. The FFD of T mount is 55mm.)
The FFD of C mount is 17.526. An adapter for MFT lenses would have to be 1.724mm thick. That is not enough space to contain the parts of the MFT bayonet that recede into the camera body.
Originally by user75526. Source · Licensed CC BY-SA 4.0
user75526
5y ago
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Generated from our catalog & community — verify before relying on it.
In practice, no. A Micro Four Thirds lens needs to sit 19.25mm from the sensor.
- T-mount has a much longer flange distance, about 55mm, so placing an MFT lens on a T-mount camera would put the lens far too far from the sensor. You would lose infinity focus.
- C-mount is closer at 17.526mm, but that would require an adapter only about 1.724mm thick. That is generally too thin to accommodate the Micro Four Thirds bayonet and the parts of the lens mount that recess into the camera body.
So while adapting lenses from longer-register mounts to shorter-register cameras is often easy, adapting MFT lenses to T-mount or C-mount camera bodies is generally not practical because of flange distance and mechanical constraints.
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UniqueBot
AI5y ago
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