How to shoot video on Pentax K-1 with manually self choosen aperture?

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RobvanO New Member • Posts: 10
How to shoot video on Pentax K-1 with manually self choosen aperture?

I'm looking for an instruction how to shoot video, using variable aperture.
Is there a way to shoot video with manually variable self-choosen aperture?

I want to shoot video using an old prime K-lens (SMC PENTAX-M 28mm 1:2,8). I want to choose the aperture by hand during shooting in video-mode. The lens has only an aperture ring, but in video-mode, also with f:16 the aperture seems to be constantly wide open.

The only way in which it seems possible to shoot video with variable aperture is using an old M42 screw mount lens, using a Pentax M42 screw mount adapter, in the manual mode (automatic / manual switch), .
Is there another way, so that I can also use the older M- and F-lenses (K-bajonet) and use the aperture during shooting video?

Sorry if I overlooked a thread with the answer, but I couldn´t find it untill now,,,,

Pentax K-1
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