JJC Micro 4/3 Auto Focus Macro Extension Tube Set

1. Introduction

The JJC Micro 4/3 Auto Focus Macro Extension Tube Set is designed to enable your lens to focus closer than its normal minimum focusing distance. This effectively magnifies your subject, making it appear larger in the viewfinder and in your pictures. This set is particularly useful for macro photography, offering a cost-effective way to convert almost any lens into a macro lens while preserving its original optical quality. The extension tubes contain no optical elements, ensuring no degradation of your lens's image quality.

Image 1.1: Overview of the JJC Micro 4/3 Auto Focus Macro Extension Tube Set.

2. Product Overview

The set includes two extension tubes of different lengths: 10mm and 16mm. These tubes can be used individually or combined to achieve various magnification levels. The camera mount is constructed from aluminum, while the lens mount is made of high-quality brass, ensuring durability and a secure fit. The tube body is made of high-quality ABS plastic. Built-in gilt metal contacts ensure full autofocus and auto exposure compatibility between your camera and lens.

Image 2.1: Key components of the extension tube, including dismounting button, guide pin, gilt metal contacts, metal bayonets, and anchor point.

3. Setup and Installation

Follow these steps to properly attach the extension tubes to your camera and lens:

1. Remove the Lens: Ensure your camera is powered off. Press the lens release button on your camera body and rotate the lens counter-clockwise to detach it.
2. Attach the Extension Tube to Camera: Align the red dot or white square on the extension tube with the corresponding mark on your camera body. Insert the tube into the camera mount and rotate it clockwise until it clicks securely into place.
3. Attach the Lens to Extension Tube: Align the red dot or white square on your lens with the corresponding mark on the attached extension tube. Insert the lens into the tube mount and rotate it clockwise until it clicks securely into place.
4. Removing the Tubes: To remove the lens and tubes, reverse the installation process. Press the lens release button on the tube (or camera body if removing the entire assembly) and rotate counter-clockwise.

Image 3.1: Demonstrates how the 10mm, 16mm, and combined tubes attach to a Micro Four Thirds camera.

Image 3.2: Visual guide for attaching and detaching the extension tubes.

4. Operating Instructions

The extension tubes shorten the minimum focusing distance of your lens, allowing for closer focus and greater magnification. You can use the 10mm tube, the 16mm tube, or both in combination to achieve different levels of magnification. The greater the total length of the extension tubes, the closer your lens can focus.

Autofocus and Auto Exposure

The JJC extension tubes retain full autofocus and auto exposure capabilities. However, it is important to note that when using extension tubes, especially with multiple tubes stacked, the autofocus function may not perform optimally. This is a common characteristic across all brands of extension tube sets.

• Reduced Depth of Field: Adding extension tubes significantly reduces the depth of field. This means your camera may struggle to autofocus accurately due to the very narrow plane of focus.
• Increased Light Requirement: The more tubes you add, the more you may need to close up the aperture to get the subject in focus, which in turn requires more light.
• Recommended Practice: For best results, especially with multiple tubes, consider using manual focus. Setting your camera on a tripod with a focusing rail can also greatly assist in achieving precise focus.

Image 4.1: Comparison of original image vs. images taken with 10mm, 16mm, and combined 10mm+16mm extension tubes.

5. Maintenance

To ensure the longevity and optimal performance of your extension tube set, follow these maintenance guidelines:

• Cleaning: Use a soft, clean microfiber cloth to wipe the exterior of the tubes. For the metal contacts, use a clean, dry cotton swab. Avoid using harsh chemicals or abrasive materials.
• Storage: When not in use, store the extension tubes in a dry, dust-free environment. Use the provided storage pouch to protect them from dust and scratches.
• Handling: Always handle the tubes by their body, avoiding touching the metal contacts or the interior surfaces.

6. Troubleshooting

If you encounter issues while using your extension tube set, consider the following:

• Autofocus Issues: If autofocus is slow or inaccurate, this is often due to the reduced depth of field inherent in macro photography with extension tubes. Try switching to manual focus. Ensure sufficient lighting for your subject.
• Exposure Problems: If images are too dark or too bright, check your camera's exposure settings. The increased magnification may require adjustments to aperture, shutter speed, or ISO.
• Connection Problems: If the camera or lens does not recognize the tubes, ensure they are securely attached and clicked into place. Check that the metal contacts on both the tubes and your camera/lens are clean and free of debris.
• Image Softness: Macro photography requires precise focus. If images appear soft, ensure you are using a stable setup (e.g., tripod) and precise manual focusing.

7. Specifications

8. Warranty and Support

For warranty information and customer support, please refer to the official JJC website or contact your retailer. Keep your proof of purchase for any warranty claims.