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04-27-2016, 06:10 PM   #1
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LS lens to Pentax digital body.

Does anyone using any medium format LS lens to Pentax or other digital body? I'm thinking to buy the adapter from 67 to K mount for using the LS lens in order to sync more than 1/250.

04-27-2016, 09:02 PM   #2
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I have used the Pentax leaf shutter lenses (67 and 645) on the film 645. You have to set the focal plane shutter at 1/8 of a second. The mechanism that stops the lens down also fires the shutter. The 67 to K mount adapter does not have a mechanism to close down the aperture so it can't be used for leaf shutter use.
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