[aslyfox]

Ahoy!

Unless it's a trick of the light, the image posted of the Tokura lens MC mount and rear lens element seems to show either fungus or haze, If this is the case, keep it away from all other lenses and use it as a paperweight or doorstop as it'll cost way more to have pro cleaned than the value/worth of the lens itself. Hopefully I'm wrong, but if not do keep it off your camera body and away from other optics.

As for using it on a DSLR, you'll need a MC to K-Mount lens adapter (preferably a chipped version) as the camera then knows a lens is attached and you'll have both image stabilisation and a focus confirmation 'beep'. Using a plain adapter, the camera won't know a lens is fitted and therefore won't allow the shutter button to be depressed, so a menu change needs to be made to turn off any lens fitted functionality. There are several manual focus mounts such as M42, M39, SR, MC, MD and I'm a fan of M42 screw-mount for which I have a chipped-lens adapter and requires no camera menu changes as the camera 'sees' the lens. Of the M42 lenses,my current favourites are the Helios, Prinzflex, Asahi Pentax and *Jupiter brands (* best Jupiter lens models are the alpha-numeric models and not numeric such as 11A instead of 11 as they're vastly superior and normally have curved aperture blades).

Is any of this of use to you or have you since discovered all you need about using MF lenses on DSLR bodies?

thanks for the warning. not sure if there is fungus or not but won't take any chances.

I don't have any plans to use an adapter for it or my screw mount Yashica auto yashinon-ds 28 mm 1:2.8 which I also inherited from my dad I have read that you can have problems with such adapters.

all knowledge is of help to me