his Nikon angle finder is a viewfinder accessory for compatible Nikon and Nikkormat cameras. It allows photographers to look through the viewfinder from a lower position or at an alternative angle, without having to place their eye directly behind the camera. This is particularly useful for macro photography, copy work and low-angle shooting.
This example is described as suitable for the Nikkormat F with the Photomic-T finder. Please verify the connection and compatibility with your specific camera setup before purchasing.