Canon CN20x50 Operation Manual

Pages 128

Year 2015

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of 128

Canon CN20x50 Specification

The Canon CN20x50 Lens is a high-performance, ultra-telephoto cine-servo lens designed for professional cinema and broadcast use. Ideal for capturing distant subjects with precision and clarity, it features a 20x zoom range, extending from 50mm to 1000mm, and is further enhanced by a built-in 1.5x extender that increases the focal length to an impressive 75mm to 1500mm. The lens is compatible with Super 35mm and full-frame sensors, offering versatility across various shooting environments. It incorporates an 11-blade iris diaphragm to produce a pleasing bokeh effect, enhancing aesthetic quality in out-of-focus areas. Advanced optical design, incorporating large-diameter aspherical elements and fluorite lenses, minimizes chromatic aberrations and maintains superior image quality. The lens supports 4K resolution, ensuring detailed and sharp imagery across the zoom range. Featuring a servo drive unit, the CN20x50 allows for smooth, precise zoom, focus, and iris control, essential for dynamic shooting scenarios. The drive unit is detachable, providing flexibility for different shooting styles. With a robust and weather-resistant construction, the lens is designed to withstand challenging shooting conditions. It also includes a support for both EF and PL mounts, increasing its compatibility with a wide range of camera systems. The lens is equipped with three 20-pin connectors and a 12-pin connector, facilitating seamless integration with broadcast and cinema equipment. The Canon CN20x50 is engineered for professionals who demand exceptional optical performance and operational versatility, making it an indispensable tool for nature documentaries, sports events, and cinematic productions where capturing distant action with refined detail is crucial.

Canon CN20x50 F.A.Q.

What are the key features of the Canon CN20x50 lens?

The Canon CN20x50 lens features a 20x zoom range, a focal length of 50-1000mm, a built-in 1.5x extender, and is designed for 4K cameras. It offers exceptional optical performance, image stabilization, and is suitable for both broadcast and cinema applications.

How do I properly mount the Canon CN20x50 lens on a camera?

Ensure the camera is powered off, align the lens mount with the camera's mount, and gently rotate the lens until it clicks into place. Always refer to the camera's manual for specific mounting instructions to ensure compatibility and security.

What is the best way to clean and maintain the Canon CN20x50 lens?

Use a lens blower to remove dust, a microfiber cloth for wiping, and lens cleaning solution for stubborn smudges. Avoid excessive moisture and always store the lens in a dry, dust-free environment. Regularly check for any signs of wear or damage.

How can I troubleshoot autofocus issues with the Canon CN20x50 lens?

Ensure the lens is properly mounted, check for firmware updates, and verify camera settings. If the issue persists, try resetting the camera or testing the lens on another compatible camera to determine if the issue is lens-specific.

What should I do if the image stabilization on the Canon CN20x50 lens is not working?

Check if the image stabilization switch is turned on, ensure the battery is fully charged, and confirm that the camera settings are configured to support stabilization. If the problem continues, consult the user manual or contact Canon support.

How do I adjust the back focus on the Canon CN20x50 lens?

Use the back focus adjustment ring located near the lens mount. Loosen the lock screw, rotate the adjustment ring until the image is sharp, then tighten the lock screw. Always perform this adjustment in a controlled environment with appropriate targets.

Can the Canon CN20x50 lens be used with full-frame cameras?

Yes, the Canon CN20x50 lens can be used with full-frame cameras. However, when using the built-in 1.5x extender, it is designed to cover Super 35mm sensors, so vignetting may occur on full-frame sensors without the extender.

What precautions should I take when transporting the Canon CN20x50 lens?

Always use a padded lens case or a professional lens bag. Ensure the lens is securely fastened in the case, and avoid exposing it to extreme temperatures, moisture, or shock. Use silica gel packets to prevent moisture build-up.

How do I calibrate the Canon CN20x50 lens for optimal performance?

Perform lens calibration using a lens calibration tool or chart. Align the lens and camera with the chart, capture test images, and make necessary adjustments in the camera settings to achieve optimal focus and sharpness.

What are common compatibility issues when using the Canon CN20x50 lens with third-party accessories?

Common issues include mounting incompatibilities, electronic communication errors, and physical interference with accessory components. Always check compatibility lists provided by Canon or the accessory manufacturer and test accessories thoroughly before use.