Nikon TC-201 Lens adapter

The Nikon TC-201 2x teleconverter is a manual focus, AI-S coupling accessory designed to double the focal length of compatible Nikkor lenses, primarily those with a focal length of 200mm or less.
Main features and specifications
The TC-201 is an all-metal teleconverter, known for its high-quality optics at the time of its release. It maintains full-aperture metering with compatible AI/AI-S type cameras and lenses.
Specification Detail
2x magnification
Construction of the 7-element lens in 5 groups
Compatible with Nikon F (AI-S type manual focus)
Light loss of 2 aperture stops (for example, an f/2.8 lens becomes f/5.6)
Dimensions: 64.5 mm (diameter) x 52 mm (total length); 44 mm extension from the lens flange.
Weight: Approximately 230g
Focus type: Manual focus only (even with AF lenses)