Canon EF 100-300mm f/4.5-5.6 USM 望遠ズームレンズ ユーザーマニュアル

1.製品オーバーview

The Canon EF 100-300mm f/4.5-5.6 USM is a highly practical and portable telephoto zoom lens designed for Canon SLR cameras. Its compact design is achieved through five zoom groups, resulting in a length of only 4.8 inches (121.5mm). The lens features a rear focusing system, which ensures that the lens length does not change and the front element does not rotate during focusing. This design maintains the integrity of any attached filters and contributes to quick and quiet autofocusing.

主な特徴:

• EF mount for compatibility with Canon EOS cameras.
• Telephoto zoom lens with a versatile 100-300mm focal length range.
• Maximum aperture of f/4.5-5.6.
• Inner focusing system for stable operation.
• Full-time manual focus override.
• Ring-type UltraSonic Motor (USM) for fast, quiet, and precise autofocus.

図1: 前面 view of the Canon EF 100-300mm f/4.5-5.6 USM Telephoto Zoom Lens.

2. セットアップ

レンズの取り付け:

1. カメラの電源がオフになっていることを確認してください。
2. レンズからレンズリアキャップを取り外し、カメラからボディキャップを取り外します。
3. レンズの赤いインデックスマークをカメラ本体の赤いインデックスマークに合わせます。
4. レンズをカメラマウントに挿入し、カチッと音がするまで時計回りに回します。

レンズの取り外し:

1. カメラの電源がオフになっていることを確認してください。
2. カメラ本体のレンズ取り外しボタンを押しながら、レンズを反時計回りに止まるまで回します。
3. Remove the lens and attach the rear lens cap. Attach the body cap to the camera.

Figure 2: Rear mount of the lens, showing electrical contacts for camera communication.

3. 操作手順

Focusing Modes (AF/MF):

This lens supports both autofocus (AF) and manual focus (MF). A switch on the side of the lens allows you to select the desired mode.

• AF（オートフォーカス）： Set the switch to 'AF'. The camera will automatically focus when the shutter button is pressed halfway. The Ring-type USM provides fast and quiet autofocus performance.
• MF（マニュアルフォーカス）: Set the switch to 'MF'. Rotate the focusing ring on the lens to adjust focus manually. This lens also features full-time manual focus, allowing you to fine-tune focus manually even when in AF mode, without needing to switch modes.

ズーミング：

To change the focal length, rotate the zoom ring on the lens. The lens offers a zoom range from 100mm (wide telephoto) to 300mm (super telephoto). The current focal length is indicated on the lens barrel.

絞り制御：

The aperture (f/4.5-5.6) is controlled electronically by the camera. Select your desired shooting mode (e.g., Aperture-priority AE, Manual) on your camera to adjust the aperture setting.

フィルターの使用:

The front of the lens is threaded to accept screw-in filters. Since the lens uses a rear focusing system, the front element does not rotate during focusing, which is beneficial when using polarizing or graduated neutral density filters.

図3：側面 view of the lens, showing the zoom ring and focus ring.

4. メンテナンス

レンズの掃除:

• レンズ要素: Use a lens blower brush to remove dust. For smudges or fingerprints, use a clean, soft lens cloth specifically designed for optical surfaces, along with a small amount of lens cleaning fluid. Apply fluid to the cloth, not directly to the lens.
• レンズ本体: Wipe the lens body with a soft, dry cloth. Avoid using organic solvents to clean the lens body.

ストレージ：

• レンズを使用しないときは、必ずレンズの前面と背面のキャップを取り付けてください。
• レンズは直射日光や高湿度を避け、涼しく乾燥した換気の良い場所に保管してください。
• Avoid storing the lens in areas prone to extreme temperature changes.

取り扱い上の注意:

• レンズを落としたり、強い衝撃を与えたりしないでください。
• Do not leave the lens in direct sunlight for extended periods, as this can damage internal components.
• Keep the lens away from magnetic fields.

5。 トラブルシューティング

オートフォーカスが機能しない:

• Ensure the AF/MF switch on the lens is set to 'AF'.
• レンズがカメラ本体にしっかりと取り付けられていることを確認してください。
• Verify that the camera's autofocus settings are correctly configured.
• レンズマウントとカメラ本体の両方の電気接点を清潔で乾いた布で拭いてください。

ぼやけた画像:

• レンズ要素がきれいで、汚れやほこりがないことを確認します。
• Check that the focus is correctly set for your subject.
• Use a faster shutter speed or a tripod to prevent camera shake, especially at longer focal lengths (300mm).
• Verify that the aperture setting is appropriate for your desired depth of field.

レンズがカメラに認識されない:

• レンズを取り外して再度取り付け、カチッと音がしてしっかりと固定されていることを確認します。
• レンズとカメラ本体の両方の電気接点を清掃します。
• カメラのファームウェアが最新であることを確認してください。

6. 仕様

7. 保証とサポート

保証情報:

This product may be covered by a limited warranty. For specific warranty details, including duration and coverage, please refer to the documentation provided at the time of purchase or contact your retailer. A typical warranty may include a 14-day satisfaction guarantee and a 90-day parts and labor warranty, depending on the seller and region.

カスタマーサポート:

For technical assistance, service, or inquiries regarding your Canon EF 100-300mm f/4.5-5.6 USM Telephoto Zoom Lens, please contact Canon customer support or visit the official Canon website for your region. You may need to provide the product model number (2565A003) and serial number for support.