Pentax KF: Using Vintage Lenses (K, M, M42)

[@Kaufeetimevideo]

Are you planning a series of this subject for all Pentax SLR'S?

[@PentaxTips]

Just the SLRs that I am providing a full overview on (soon to come!). Those overviews are accompanied by a WiFi video and a Manual Lenses video. However, the process is pretty much the same across bodies.

[@gilgaladxx8393]

I use another camera system, so I am asking if Pentax modern lens mount is called Pentax K for modern and old lenses ? disregarding about af comptability etc. just in order to mount the lens and recognize the correct adapter for mount modern pentax lens on mirrorless, thanks

[@PentaxTips]

Pentax started off with the M42 screw mount. Then in the 70s switched to the K-Mount and have used that mount ever since. However, there have been many iterations of the K-Mount with different functions (auto aperture/ auto focus/types of auto).

[@kwazar3803]

So, did I understand correctly that the aperture priority mode cannot be used with vintage lenses with K mount? What about TAv mode? Can one use it with all vintage lenses?

[@PentaxTips]

You cannot use AV/TAv mode (auto shutter speed calculated when rotating aperture ring) with vintage k-mount lenses because when mounted on the camera, the aperture does not close down when you rotate the aperture ring, it stays wide open. So, the only way to get a light meter reading for your shutter speed is to hit the green button, which stops down the lens aperture and takes the shutter speed reading.

[@kwazar3803]

@@PentaxTips Thanks for your answer. In this case I have another question: Is it possible to have a depth of field preview while using vintage k - mount lenses?

[@kici5777]

Do you know what's the shutter life of the KF ?

[@PentaxTips]

It’s not officially posted, but it’s generally agreed to be around 50,000 actuations

[@Oxygenumpl]

@@PentaxTips My Pentax K-70 , 7 years old , identical hardware like KF: Results Shutter count 51663 PENTAX K-70 , still works fine!

[@MJohnson-qp9he]

What adapter should I get to use my m42 lenses on my pentax k3? Thanks

[@PentaxTips]

M42 to K-Mount adapter. By the authentic official thing, the cheap knock offs are not worth it

[@Halundich1234]

Is no one gonna address the focusing issues you are going to have with vintage glass?

[@PentaxTips]

You thought you’d get autofocus with a vintage lens? No, there is no issue. You manually focus with the ring on the lens.