EVF camera for M lenses?

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jrethorst Forum Member • Posts: 84
EVF camera for M lenses?

There was something on a news site not too long ago, that Leica had developed a prototype like the M10 but with an EVF viewfinder. Interesting, but I wonder how feasible it would be.

Assuming EVF cameras are like SLR cameras, when you look through the viewfinder you see a bright image because the lens aperture is wide open, no matter where you (or program exposure) has set the aperture for the photograph. When you click the shutter, the lens steps down for the exposure and then goes back to wide open.

I'm guessing that M lenses don't do this, since there's no reason to -- the photographer is not looking through the lens. So on an EVF camera, the lens aperture would need to be manually stopped down, at least to set exposure, and in practice for the last moment of composition.

Is this right? Is it how the M10 and 240 work in live view?

Thanks,
John R.

Leica M10
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