I worked out how to use M mode with the Taks today. Thanks Ira you are right they do come out properly exposed and there's no need to compensate with contrast or whatever.
Yesterday I won what would be described as a bargain lens at KEH - I got a 150/4 super Tak from ebay for £16. I think perhaps it's ex-military. There is a little radioactive symbol on the barrel.
Hoewever, I wonder if something is not quite right with this lens. In some shots things that are bright produce the effect shown below. Is this CA?
This effect doesn't happen on every shot in which there's something bright. I'm wondering whether I should return the lens or maybe get it refurbished. Unfortunately it didn't come with a hood.