EF1.4X lIl and EF2X llI teleconverter user manual, including product safety warnings, instructions for use, specifications and other information
This manual explains how to safely use Canon's EF1.4X III and EF2X III teleconverters, including important warnings about viewing the sun, avoiding high temperatures, and proper handling to prevent damage. It also details compatibility limits, noting that the teleconverters work only with EOS‑1V among film cameras.
The guide covers assembly and disassembly procedures, explains how the maximum aperture changes when the teleconverters are attached, and lists the main technical specifications such as lens construction, dimensions, weight, and protection ring part numbers. This manual is written in Chinese.
| Assembly method | Canon EF assembly (full electronic control) |
|---|---|
| Lens construction | EF1.4X: 3 groups, 7 elements; EF2X: 5 groups, 9 elements |
| EF1.4X dimensions | 72.0 mm × 27.2 mm |
| EF2X dimensions | 72.0 mm × 52.7 mm |
| EF1.4X weight | ≈225 g |
| EF2X weight | ≈325 g |
| Protection ring part number | LP811 |
No, the teleconverters cannot be used with other film cameras; using them with non‑EOS‑1V film cameras may cause operation anomalies.
Do not look at the sun or strong light sources through a lens with the teleconverter attached, do not leave the camera exposed to sunlight without a lens cap, and avoid high temperatures that could damage the teleconverter.
When using the EF1.4X, the maximum aperture is reduced by one stop; with the EF2X, it is reduced by two stops, and the camera automatically compensates exposure.