Pentax 645n Instruction Manual.  type_Light Meter The Nikon TC-300 is a

The Nikon TC-300 is a teleconverter designed for Nikkor lenses with focal lengths longer than 300mm

minor wear on the baseplate

and only minor cosmetic wear

and the menu is definitely not designed for beginners

filling the spacious and adaptable 33x13x48cm compartment should be easy for the run and gun video/photo pro

Pentax 645n Instruction Manual. &nbsptype_Light Meter The Nikon TC-300 is aOriginal Pentax instructional manual for the 645n. English language copy. Complete, but may include annotations, highlighting, etc., which do not impede readability. Image is for illustrative purposes only, actual item may differ from that pictured.