1. Introduction
The VILTROX C-AF 2X II Auto Focus 2.0X Teleconverter is designed to extend the focal length of compatible Canon EF mount telephoto lenses by a factor of 2.0X. This allows for an increased telephoto shooting range without the need for additional lenses, making it suitable for subjects such as wildlife and sports photography. The teleconverter maintains autofocus functionality and transmits EXIF data between the lens and camera.
Image: VILTROX C-AF 2X II AF 2.0X EF-Mount Teleconverter.
2. Package Contents
Verify that all items are present in the package:
- VILTROX C-AF 2X II Teleconverter
- Front Lens Cap
- Rear Lens Cap
- Instruction Manual
Image: The VILTROX C-AF 2X II Teleconverter, front and back caps, packaging box, and instruction manual.
3. Product Overview
Familiarize yourself with the components of the VILTROX C-AF 2X II Teleconverter.
Image: Diagram showing key features: Lens installation mark, Optical glass, Camera installation mark, USB upgrade port, Lens release button, Contact (lens end), Contact (camera end).
- Lens Installation Mark: Align with the mark on your lens for proper attachment.
- Optical Glass: High-quality elements for image magnification.
- Camera Installation Mark: Align with the mark on your camera body for proper attachment.
- USB Upgrade Port: For firmware updates.
- Lens Release Button: Used to detach the teleconverter from the lens.
- Contacts (Lens End & Camera End): Metal electronic contacts for data transmission and autofocus.
4. Setup and Installation
Follow these steps to correctly attach the teleconverter to your lens and camera.
4.1 Compatibility
The VILTROX C-AF 2X II is designed for Canon EF mount telephoto lenses ranging from 135mm to 600mm, including popular models like 70-200mm and 100-400mm. It is compatible with various Canon DSLR camera bodies, such as the 5D Mark II, 80D, 760D, and 7D series.
Note: Short-telephoto lenses shorter than 60mm are not recommended for use with this teleconverter.
4.2 Attaching the Teleconverter to the Lens
- Remove the rear cap from your lens and the front cap from the teleconverter.
- Align the red dot (installation mark) on the teleconverter with the corresponding mark on your Canon EF mount telephoto lens.
- Gently twist the teleconverter clockwise until it clicks into place, ensuring it is securely locked.
4.3 Attaching the Lens-Teleconverter Assembly to the Camera
- Remove the body cap from your camera and the rear cap from the teleconverter.
- Align the red dot (installation mark) on the teleconverter with the corresponding mark on your Canon DSLR camera body.
- Gently twist the lens-teleconverter assembly clockwise until it clicks into place, ensuring it is securely locked.
Image: The VILTROX C-AF 2X II Teleconverter mounted between a Tamron telephoto lens and a Canon DSLR camera.
Image: The VILTROX C-AF 2X II Teleconverter mounted between a Canon L-series telephoto lens and a Canon 5D DSLR camera, shown on a tripod.
5. Operating Instructions
The teleconverter enhances your lens's capabilities. Here's how to use it effectively.
5.1 Extended Telephoto Shooting Range
The C-AF 2X II teleconverter doubles the focal length of your attached lens. For example, a 70-200mm lens becomes a 140-400mm lens, significantly extending your reach for distant subjects.
Image: A comparison showing the extended telephoto shooting range when using the teleconverter versus not using it, illustrated with a bird subject.
5.2 Autofocus Functionality
The teleconverter is compatible with Canon's high-performance autofocus technology. You can achieve fast and smooth focusing by pressing the camera's shutter button. The image stabilization system on both the camera body and the primary lens remains effective, assisting in capturing sharp images.
Image: Hands holding a Canon DSLR camera with a teleconverter and lens attached, demonstrating autofocus capability.
5.3 Optical Performance
The C-AF 2X II features an optical design with 4 groups and 7 elements. This construction is engineered to maximize the performance of the primary lens while minimizing aberrations that can occur with teleconverters. Good rendering performance is maintained, even when images are cropped.
Image: A Canon DSLR with teleconverter and lens, alongside a detailed shot of a plant, illustrating the optical quality.
5.4 EXIF Information Transmission
Equipped with a microchip and exposed metal electronic contacts, the teleconverter ensures seamless data transmission between the lens, the teleconverter, and the camera. This allows for accurate recording of EXIF information, including focal length and aperture, and ensures compatibility between components.
Image: A person holding a Canon DSLR camera with a teleconverter and lens, highlighting the electronic contacts for EXIF data transmission.
6. Maintenance
Proper care and maintenance will ensure the longevity and optimal performance of your teleconverter.
- Cleaning: Use a soft, lint-free cloth to clean the exterior. For optical surfaces, use a lens cleaning solution and a microfiber lens cloth. Avoid touching the glass elements directly with your fingers.
- Dust Protection: Always keep the front and rear caps on the teleconverter when not in use to prevent dust and debris from entering.
- Storage: Store the teleconverter in a dry, cool place, away from direct sunlight and extreme temperatures.
- Avoid Impact: Handle the teleconverter with care to prevent drops or impacts, which can damage the optical elements or electronic contacts.
7. Troubleshooting
If you encounter issues, refer to the following common troubleshooting steps.
- Autofocus Not Working:
- Ensure the teleconverter and lens are securely attached to the camera body.
- Check that the electronic contacts on both the teleconverter and the lens/camera are clean and free of debris.
- Verify that your lens and camera are compatible with the teleconverter.
- Image Quality Issues:
- Ensure all optical surfaces (lens, teleconverter, camera sensor) are clean.
- Check for proper focus.
- Using a teleconverter can reduce the effective aperture, potentially requiring higher ISO or slower shutter speeds in low light.
- Firmware Update: The teleconverter features a USB upgrade port. Check the VILTROX official website for any available firmware updates that may resolve compatibility or performance issues.
8. Specifications
| Feature | Specification |
|---|---|
| Model | C-AF 2X II |
| Magnification | 2.0X |
| Compatible Mountings | Canon EF Mount |
| Optical Construction | 7 elements in 4 groups |
| Autofocus | Supported |
| EXIF Transmission | Supported |
| Firmware Upgrade | USB Port |
| Product Dimensions | 1.18 x 3.27 x 3.27 inches (approx.) |
| Item Weight | 10.5 ounces (approx.) |
| Manufacturer | VILTROX |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact VILTROX customer service through their official website or the retailer where the product was purchased. Please have your product model and purchase date available when contacting support.
