MF rangefinder with TTL metering?

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olwick

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Does anyone know of a medium format (film) rangefinder that has TTL metering? Ideally 6x6 or 6x7.

The reasoning is not meter accuracy, but the fact that I shoot a lot of infrared film. I do the compensation now, but I'm lazy and wanted to find a camera that I could leave my super-dark R72 filter on, but still have a nice bright RF to focus through.

Thanks,

Mark
 
Leaf shutter isn't necessarily a limiting factor. The RB67 (and I think RZ67) keeps the leaf shutter open while you're composing the picture and with the AE finder it uses the light through the lens to meter. When you press the shutter button it closes the shutter, lifts the light baffle and mirror, opens the shutter for duration of exposure, closes shutter. This is slower and more complicated than cameras which simply leave the shutter closed until you need it but it is possible for SLRs so it should be possible for RF as well.

The Pentax 67II is a beautiful camera, but I can't see a thing through it when I have the R72 filter on it.
 
olwick said:
Leaf shutter isn't necessarily a limiting factor. The RB67 (and I think RZ67) keeps the leaf shutter open while you're composing the picture and with the AE finder it uses the light through the lens to meter. When you press the shutter button it closes the shutter, lifts the light baffle and mirror, opens the shutter for duration of exposure, closes shutter. This is slower and more complicated than cameras which simply leave the shutter closed until you need it but it is possible for SLRs so it should be possible for RF as well.
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Click to expand...

Well, if you build a fast-moving light baffle (essentially a second, untimed shutter) into a RF body, you add weight, bulk, vibration and shutter lag to a point where it's advantages over a SLR design are mostly negated.
 
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