This document is a user manual for a certain brand and model of product, which includes safety precautions, prohibited actions, mandatory actions, and other usage considerations. The content covers warnings and precautions related to disassembly, repair, water exposure, fire, electric shock, and more.
This manual explains how to safely use the Nikon TC-20E III teleconverter. It covers safety precautions, parts identification, and the main features of the attachment lens, including its optical construction and automatic aperture coupling.
Detailed sections describe compatible AF‑S and AF‑I NIKKOR lenses, step‑by‑step installation on both camera and lens, cleaning and maintenance procedures, and full technical specifications such as dimensions, weight, and exposure measurement methods. This manual is written in Japanese.
| Lens construction | 7 elements in 5 groups (1 aspherical lens) |
|---|---|
| Diaphragm | Fully automatic aperture coupling |
| Exposure measurement | Open‑aperture metering with AI cameras; stop‑down metering with others |
| Mount | Front: special mount for AF‑S/AF‑I NIKKOR lenses; Rear: Nikon bayonet mount |
| Dimensions | ≈66 mm diameter × 48 mm flange distance, overall length ≈60 mm |
| Weight | ≈330 g |
| Aperture coupling range | f/2 – f/32 (effective f/4 – f/64) |
| Focal length effect | Effective focal length is double that of the primary lens |