Thanks Derek

Thank you Chris. It was taken over two years ago with the Pentax M 200mm f4 on my K1. In my (biased ) view it is a cracking lens.

Luckily Patrick's post gave me just the excuse I needed to post yet another picture of one of my hounds . Little Ripley is four now, where did that time go ?

That lens seems to get good reviews. Personally I would go for a Pentax lens to avoid the adapter malarkey.

If you want a cheap manual focus/exposure lens the M series 200mm f4 is a good option https://www.ebay.co.uk/itm/Pentax-M-series-200mm-F4-prime-telephoto-lens-Crystal...

This is what the M 200 f4 can do on digital.........

Looks like a M42 screw mount to me. You will need a K -screwmount adapter. Pentax make one or there are cheaper copies. I suggest the former.

That lens has a pin sticking out by the mount threads. I would want to check with other users if that might present a problem before putting on a camera.

Check out here too https://www.pentaxforums.com/userreviews/

You the lens will stop down as you turn the aperture ring.....the viewfinder will darken. You can use Manual or Av mode with that kind of lens.

Never used one myself.

Quite so Bjorn

John, I like the "livery" of the f series, despite never having owned a single one.

Interestingly, the "soft" scale in front of the aperture numbers on the F version is different from the K version. Partly because I believe the aperture is part manual/part auto on the F and FA series. Also the aperture numbers are not visible at all on the K version when mounted "correctly"...they are underneath Of course because there is no aperture linkage on the K, it can actually be mounted in one of three different positions !

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Very interesting. Welcome.

Electronic shutter engaged ?

These lenses do produce some dreamy images which are fun.

The K 85mm only goes to f5.6 so I imagine the later versions are sharper stopped down.

No 6 and 8 for me please