1. 서론
This manual provides detailed instructions for the proper use, setup, operation, and maintenance of your Sigma 120-300mm F2.8 Sports DG APO OS HSM Lens for Canon. To ensure optimal performance and longevity of your lens, please read this manual thoroughly before use and retain it for future reference.
2. 제품 오버view
The Sigma 120-300mm F2.8 Sports DG APO OS HSM lens is a high-performance telephoto zoom lens designed for Canon EF mount cameras. It features a constant F2.8 aperture throughout its zoom range, making it suitable for various photographic conditions, especially in low light. Key features include:
- Optical Stabilization (OS): Reduces camera shake for sharper images, particularly at longer focal lengths or slower shutter speeds.
- Two FLD Glass Elements: Fluorite-level performance glass elements minimize chromatic aberration, ensuring high image quality.
- 초음속 모터(HSM): Provides fast, quiet, and accurate autofocus.
- DG Design: Optimized for digital SLR cameras, ensuring high performance across the entire image frame.
- APO Designation: Apochromatic design further corrects chromatic aberrations.
- Sports Line: Built with robust construction and dust/splash-proof structure for demanding environments.

그림 2.1: 전체 view of the Sigma 120-300mm F2.8 Sports DG APO OS HSM Lens, showcasing its robust build and integrated tripod collar.
3. 설정
3.1 카메라에 렌즈 장착하기
- 카메라와 렌즈의 전원이 꺼져 있는지 확인하세요.
- 후면 렌즈 캡과 카메라 바디 캡을 제거합니다.
- Align the mounting index marks (usually red dots) on the lens and the camera body.
- Insert the lens into the camera's lens mount and turn it clockwise until it clicks into place. Do not force the lens.
- Replace the front lens cap when not in use.
3.2 초기 점검
After attaching the lens, power on your camera. Test the autofocus and zoom functions to ensure proper communication between the lens and camera body. If any issues arise, power off, re-attach the lens, and re-test.
3.3 Using the USB Dock (Optional)
The Sigma USB Dock (sold separately) allows users to update lens firmware and customize various settings, including autofocus speed, focus limiter range, and Optical Stabilization characteristics. Refer to the USB Dock's instruction manual for detailed usage.
4. 렌즈 작동
4.1 초점 모드

Figure 4.1: Detail of the focus mode, focus limiter, and OS switches on the lens barrel.
The lens features a focus mode switch on its barrel:
- AF(자동 초점): For automatic focusing. The Hyper Sonic Motor (HSM) provides fast and quiet operation.
- MF(수동 초점): 수동 초점 조절용입니다. 초점 링을 돌려 초점을 맞추세요.
Even in AF mode, full-time manual override is available, allowing you to fine-tune focus manually after autofocus has engaged.
4.2 포커스 리미터 스위치
The focus limiter switch helps to speed up autofocus by restricting the focus range. This is particularly useful when photographing subjects at a known distance.
- 가득한: Allows the lens to focus across its entire range (from minimum focusing distance to infinity).
- 10m - ∞: Limits the focus range from 10 meters to infinity. Use this setting for distant subjects to prevent the lens from hunting for focus on closer objects.
- ∞ - 10m: Limits the focus range from infinity to 10 meters. This setting is less common but can be customized via the USB Dock.
4.3 광학식 손떨림 보정(OS)
The OS switch activates or deactivates the Optical Stabilization function.
- 에: Activates the OS system to compensate for camera shake.
- OFF : Deactivates the OS system. It is recommended to turn OS off when using a tripod or when shooting at very high shutter speeds where stabilization is not required.
The lens may offer different OS modes (e.g., Mode 1 for general photography, Mode 2 for panning shots), which can often be customized via the USB Dock.
4.4 확대/축소

Figure 4.2: The zoom ring with focal length indicators (120mm, 150mm, 180mm, 200mm, 250mm, 300mm).
Rotate the zoom ring to change the focal length between 120mm and 300mm. The lens maintains a constant F2.8 aperture throughout this range.
4.5 Custom Switches (C1, C2)
The lens features custom switches (C1, C2) that allow for personalized settings configured using the Sigma USB Dock. These can be used to store different autofocus speeds, OS modes, or focus limiter ranges, providing quick access to preferred shooting configurations.
5. 유지관리 및 관리
5.1 렌즈 청소
- 블로어 브러시를 사용하여 렌즈 표면의 먼지를 제거합니다.
- 얼룩이나 지문이 묻었을 경우, 렌즈 세척액을 소량 묻힌 깨끗하고 부드러운 광학 기기 전용 극세사 천으로 닦아주세요.
- 연마재나 강한 화학 물질을 사용하지 마십시오.
- Clean the lens mount contacts with a dry, clean cloth if necessary to ensure proper communication with the camera.
5.2 보관
- 렌즈는 직사광선과 극한 온도 변화를 피해 서늘하고 건조한 곳에 보관하십시오.
- Always attach the front and rear lens caps when storing.
- 장기간 보관할 경우 곰팡이 발생을 방지하기 위해 건조제를 사용하는 것을 고려하세요.
5.3 취급
This is a substantial lens (approximately 6.5 pounds / 2.95 kg). Due to its weight and size, it is highly recommended to use a sturdy monopod or tripod with a robust head for stability and to reduce strain on the camera's lens mount. The integrated tripod collar should be used for mounting to a support system.

Figure 5.1: The Sigma 120-300mm lens attached to a camera body, illustrating its considerable size.
The lens features a dust and splash-proof construction, offering enhanced durability in various shooting conditions. However, it is not fully waterproof and should not be submerged.
6. 문제 해결
- 자동 초점 문제: If the lens struggles to focus, ensure the focus mode switch is set to AF. Check for sufficient light and contrast in your subject. If focusing on subjects surrounded by clutter (e.g., birds in branches), the autofocus system may occasionally struggle. Try switching to manual focus or using a single, precise autofocus point.
- Optical Stabilization Not Working: Ensure the OS switch is set to ON. If using a tripod, it is generally recommended to turn OS OFF.
- Lens Not Communicating with Camera: Power off both camera and lens, detach and re-attach the lens, ensuring it clicks securely into place. Clean the electrical contacts on both the lens and camera body with a dry, clean cloth.
- 특이한 소음: A slight audible click when OS engages is normal. Any other unusual noises should prompt a contact with Sigma customer support.
문제가 지속될 경우 카메라 설명서를 참조하거나 시그마 고객 지원팀에 문의하십시오.
7. 사양
| 특징 | 세부 사항 |
|---|---|
| 모델 번호 | 137101 |
| 초점거리 | 120-300mm |
| 최대 조리개 | F2.8 (상수) |
| 렌즈 유형 | 망원 줌 |
| 호환 가능한 마운팅 | 캐논 EF |
| 광학 안정화 | 예 |
| 자동 초점 모터 | Hyper Sonic Motor (HSM) |
| 제품 치수 | 11.46 x 4.88 x 4.88인치(29.1 x 12.4 x 12.4cm) |
| 품목 무게 | 6.5파운드(2.95kg) |
| 필터 크기 | 105mm (∅105) |
8. 보증 및 지원
Sigma products are covered by a manufacturer's warranty. The specific terms and duration of the warranty may vary by region and purchase date. Please refer to the warranty card included with your product or visit the official Sigma web자세한 보증 정보는 사이트를 참조하십시오.
For technical support, service, or warranty claims, please contact Sigma customer service through their official website or the authorized distributor in your region. When contacting support, please have your lens model number (137101) and purchase information readily available.
법적 고지사항: This product is sold "as is" as per the manufacturer's legal disclaimer. Users are advised to adhere to all safety guidelines and proper usage instructions provided in this manual.





