This document is the user manual for the CHI-1 EF400mm f/4 DO IS II USM lens, which describes the features and characteristics of the lens, including the combination of diffractive optical elements and aspherical elements, image stabilizer, SWC (Subwavelength Structure Coating), fluorine coating, ultrasonic motor, and focusing functions.
The Canon EF400mm f/4 DO IS II USM is a high-performance super-telephoto lens designed for EOS cameras. It features a new fluorite element and an aspherical lens element to ensure excellent image quality, along with Image Stabilizer (IS) and Ultrasonic Motor (USM) technology for sharp images and quiet autofocus. This manual is written in Chinese.
| Lens Type | Super Telephoto Lens |
|---|---|
| Focus Motor | Ultrasonic Motor (USM) |
| Image Stabilizer | Yes (IS) |
| Special Element | Fluorite and Aspherical Elements |
It stands for Diffractive Optical element.
Yes, it has excellent sealing against dust and water droplets, but it is not completely weather-sealed.
It works with EOS-1D X, 5D Mark II/III, 6D, 70D, 700D, 100D, 650D, 1200D, and EOS M series.