You can now preorder this new 250mm f/5.6 Full Frame manual focus Reflex lens at Amazon US&EU and TTartisan store. This is a M42 mount lens so you need an adapter ot use it on your camera. Here is the review from Richard Wong:
You can now preorder this new 250mm f/5.6 Full Frame manual focus Reflex lens at Amazon US&EU and TTartisan store. This is a M42 mount lens so you need an adapter ot use it on your camera. Here is the review from Richard Wong: