This macro helicoid can be used with any M39 adapter to M42 adapter; This helicoid tube is also very useful for lenses without a focus ring such as enlarger lenses.
The all metal design and polished coated surface is designed to guarantee smooth mounting and long lasting experience. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. In this case 'stop-down mode' will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. You can shoot with manual mode or aperture priority mode.
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