This is a hard to find Mamiya C Paramender parallax correction device to work with Mamiya twin lens cameras in excellent++ condition! The device only shows some minor wear and had been checked & tested to work properly with no problems. This device allows you to take close up pictures and automatically adjusts for the parallax difference between the viewing lens and taking lens. A very useful and hard to find accessory for your mamiya twin lens camera! I have a money back return policy if not... satisfied so buy with confidence. Shipping will cost $8 within the US or $20 for other international destinations.