Sigma APO Teleconverter 2x EX DG for Nikon Mount Lenses

1. Úvod

The Sigma APO Teleconverter 2x EX DG is designed to extend the focal length of compatible lenses by a factor of two. This accessory is mounted between the camera body and the lens, effectively doubling the lens's reach. It is particularly useful for nature, wildlife, and sports photography, allowing photographers to capture distant subjects without physically moving closer.

This teleconverter features a multi-layer lens coating to minimize flare and ghosting, common issues in digital photography, ensuring high image quality. While it doubles the focal length, it also results in a two-stop loss of aperture. For example, a 300mm f/2.8 lens becomes a 600mm f/5.6 when used with this 2x teleconverter.

It is important to note that this teleconverter is designed to work optimally with large aperture Sigma DG series lenses. Compatibility with specific lenses should always be verified on the manufacturer's official webmísto.

2. Co je v krabici

Po otevření balení se ujistěte, že jsou všechny součásti přítomny a v dobrém stavu:

• Sigma APO Teleconverter 2x EX DG
• Krytka předního objektivu
• Zadní krytka objektivu
• Měkké pouzdro

3. Nastavení a instalace

Follow these steps to correctly attach the teleconverter to your lens and camera:

1. Připravte si vybavení: Turn off your camera. Remove the rear lens cap from your primary lens and the body cap from your camera. Remove both caps from the teleconverter.
2. Nasaďte telekonvertor na objektiv: Align the mounting index (usually a red dot or white line) on the teleconverter with the corresponding index on your lens. Gently push the teleconverter onto the lens mount and rotate it clockwise (or counter-clockwise, depending on the mount) until it clicks securely into place.
3. Attach Lens/Teleconverter Assembly to Camera: Align the mounting index on the teleconverter with the corresponding index on your camera body. Gently push the assembled unit onto the camera mount and rotate it until it clicks securely into place.
4. Ověřit připojení: Ensure both connections are firm and secure before turning on your camera.

Odstranění: To remove the teleconverter, reverse the installation steps. First, detach the entire lens/teleconverter assembly from the camera, then detach the teleconverter from the lens. Always replace lens caps and body caps when not in use to protect the optical elements.

4. Návod k obsluze

Using the Sigma APO Teleconverter 2x EX DG effectively requires understanding its optical properties:

• Focal Length Multiplication: The teleconverter doubles the focal length of the attached lens. For examptj. z objektivu 70–200 mm se stane objektiv 140–400 mm.
• Aperture Loss: There is a two-stop loss of aperture when using this 2x teleconverter. This means an f/2.8 lens will effectively become an f/5.6 lens. Adjust your camera's ISO or shutter speed accordingly, especially in low-light conditions.
• Výkon automatického ostření: Autofocus speed and accuracy may be affected, particularly with lenses that have a slower maximum aperture or in challenging lighting conditions. Some camera bodies may lose autofocus capability if the effective maximum aperture becomes too slow (e.g., f/8 or higher). In such cases, manual focus may be necessary.
• Stabilizace obrazu: If your lens features Optical Stabilization (OS), it will generally continue to function with the teleconverter, helping to reduce camera shake at longer focal lengths.
• Optimální použití: For best results, especially at extended focal lengths, using a sturdy tripod is highly recommended to minimize blur from camera movement.

5. Údržba

Proper care and maintenance will ensure the longevity and optimal performance of your teleconverter:

• Čištění povrchů čoček: Use a soft, clean microfiber cloth specifically designed for optical lenses. For stubborn smudges, use a small amount of lens cleaning fluid applied to the cloth, not directly to the lens. Avoid touching the glass elements with your fingers.
• Čištění těla: Wipe the exterior of the teleconverter with a dry, soft cloth. Do not use organic solvents or strong cleaning agents.
• Skladování: Always attach the front and rear caps when the teleconverter is not in use. Store it in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for an extended period, consider using a desiccant to prevent mold growth.
• Vyhněte se dopadu: Handle the teleconverter with care to prevent drops or impacts, which can damage the optical elements or internal mechanisms.

6. Řešení problémů

If you encounter issues while using your teleconverter, consider the following:

• Teleconverter Not Attaching: Ensure proper alignment of the mounting indexes on both the lens and camera. Verify that your lens is compatible with the teleconverter. Some lenses, particularly those with protruding rear elements, may not physically fit.
• Autofocus Not Working or Slow: This is a common effect of teleconverters due to the reduced effective aperture. Check your camera's manual for its autofocus sensitivity limits (e.g., many cameras struggle with autofocus at f/8 or slower). In low light or with slower lenses, switch to manual focus.
• Měkké obrázky: Reduced sharpness can occur due to the optical design of teleconverters, especially when used with non-optimal lenses or at wide apertures. Try stopping down the aperture (e.g., from f/5.6 to f/8) to improve sharpness. Ensure you are using a fast enough shutter speed or a tripod to prevent camera shake.
• Problémy s expozicí: The camera's metering system should automatically compensate for the two-stop light loss. If you experience consistent over or underexposure, check your camera's metering mode and exposure compensation settings.

7. Specifikace

8. Záruka a podpora

This Sigma APO Teleconverter 2x EX DG comes with a 1 Year Limited Warranty from the manufacturer, Sigma Corporation of America. For specific warranty claims or technical support, please contact Sigma customer service.

Právní prohlášení: SERIAL #4029669 FULL 14 DAY NO HASSLE SATISFACTION GUARANTEE. This statement refers to a specific seller's return policy and is separate from the manufacturer's warranty.

For the most up-to-date compatibility charts and additional product information, please visit the official Sigma webmísto.