How does aperture control work with m42 lenses

Started May 7, 2012 | Discussions thread
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David Bourke
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How does aperture control work with m42 lenses
May 7, 2012

I have a couple M lens, so I know how to use the green button to meter, and that the camera leaves the aperture open until the shutter is released. My understanding is that M42 lens behave differently. Can someone clarify this?

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