Hi.
I would like to buy me a lens for my newly bought Tech IV which came with an 90mm f8 Super Angulon
I'm fairly new to LF and I see there seems to be many choises of lens.
I want to have a normal 135-150mm. The lens must be small enough stay on camera while folded.
I intend to use it for B&W.
What lenses (moderately priced, used?) should I best look for?

Thanks