Extension Tube Canon EF 12 II

The Canon Extension Tube EF 12 II is a 12mm extension tube designed to enable closer focusing for macro and close-up photography with compatible Canon EF and selected EF-S lenses. Lightweight at approximately 66 g and finished in black, the tube fits between camera body and lens without optics, increasing subject magnification and allowing photographers to capture finer detail when filling the frame with small subjects.

Advantages

The extension tube preserves electronic communication between camera and lens so autofocus and aperture control remain available with compatible equipment. Its 12mm length provides a noticeable increase in magnification while keeping weight and bulk to a minimum, making it convenient for field use. The simple mechanical design avoids introducing additional glass elements, so image quality is determined by the mounted lens, with the tube enabling closer working distance for more detailed shots.

Suitable for

• Close-up and macro photography of small subjects such as flowers, insects and product details
• Creative shallow depth-of-field images at short working distances
• Photographers using Canon EF and selected EF-S lenses seeking greater subject magnification

Key specifications

• Extension length: 12 mm
• Compatibility: Canon EF mount; usable with selected EF-S lenses (camera body dependent)
• Weight: approximately 0.066 kg
• Finish: black
• Mechanical design: optical element-free extension tube that maintains electrical contacts

How to use

Mount the Extension Tube EF 12 II between your Canon camera body and a compatible EF or selected EF-S lens by aligning the mounting marks and rotating to lock. After attachment, focus and exposure control are available through the camera and lens; because the tube increases magnification, achieve focus by adjusting camera-to-subject distance or lens focus. Use manual focus or autofocus depending on lens and camera compatibility, and check viewfinder or live view for precise focus. Be aware that effective aperture changes with extension, which may require longer shutter speeds or higher ISO.

Usage recommendations

Use the tube with lenses that focus closely and perform well optically at short distances; combine with a tripod, adequate lighting or a ring light for steady, well-exposed macro shots. For greater magnification, consider stacking with compatible extension tubes only if electrical continuity and safe mounting are ensured. Avoid using the tube with lenses that do not physically clear the reduced working distance or with unsupported camera models.