1. Pengenalan
This instruction manual provides essential information for the safe and effective use of your SIGMA 18-50mm F2.8 DC DN Contemporary Lens for Canon RF Mount Mirrorless Cameras. Please read this manual thoroughly before using the product to ensure proper operation and to maximize its performance and longevity. Keep this manual in a safe place for future reference.
2. Produk Lebihview
The SIGMA 18-50mm F2.8 DC DN Contemporary lens is a high-performance, versatile zoom lens designed specifically for Canon RF Mount APS-C mirrorless cameras. It offers a constant F2.8 aperture throughout its zoom range, providing excellent low-light performance and shallow depth of field capabilities.
Ciri-ciri Utama:
- Prestasi Tinggi: Delivers high-quality optical performance across the entire zoom range.
- Ringan dan Padat: Designed to be small and light, making it ideal for everyday use and travel.
- Rubber Sealed Mount: Features a rubber-sealed mount for enhanced dust and splash resistance, suitable for various environments.
- Easy Close-Up Shots: Achieves a minimum focusing distance of 12.1cm and a maximum magnification of 1:2.8, enabling detailed close-up photography.

Figure 2.1: The SIGMA 18-50mm F2.8 DC DN Contemporary Lens. This image shows the lens with its zoom and focus rings, aperture markings, and the SIGMA branding.

Figure 2.2: The compact size of the SIGMA 18-50mm F2.8 DC DN Contemporary Lens, shown held in a hand for scale.
3. Persediaan
3.1 Memasang Kanta pada Kamera Anda
- Pastikan kedua-dua kamera dan kanta bersih dan bebas daripada habuk.
- Align the white index mark on the lens barrel with the corresponding white index mark on your Canon RF mount camera body.
- Masukkan kanta dengan lembut ke dalam dudukan kamera.
- Putar kanta mengikut arah jam sehingga ia klik pada tempatnya, menunjukkan ia telah dikunci dengan selamat.
- Tanggalkan penutup kanta hadapan.
Penting: Avoid touching the lens contacts or the camera's sensor during attachment. Always hold the lens firmly by its barrel, not by the front element.
3.2 Memasang Tudung Lensa
The included lens hood helps to block unwanted stray light, reducing flare and ghosting, and provides some physical protection to the front element.
- Jajarkan titik merah pada hud lensa dengan titik merah di hadapan laras kanta.
- Tolak hud pada kanta dan putarkannya mengikut arah jam sehingga ia terkunci dengan selamat.

Figure 3.1: The dedicated petal-shaped lens hood for the SIGMA 18-50mm F2.8 DC DN Contemporary Lens.
Untuk penyimpanan, hud lensa boleh diterbalikkan dan dipasang pada lensa.
4. Arahan Operasi
4.1 Mengezum
To adjust the focal length, rotate the zoom ring on the lens barrel. The lens covers a versatile range from 18mm (wide-angle) to 50mm (standard/short telephoto).

Figure 4.1: A photographer using the SIGMA 18-50mm F2.8 DC DN Contemporary Lens on a Canon RF mount camera in an outdoor setting. This illustrates the lens in practical use.
4.2 Memberi tumpuan
This lens supports both autofocus (AF) and manual focus (MF) modes, controlled via your camera body settings.
- Autofokus (AF): When your camera is set to AF mode, the lens will automatically focus on your subject. The lens features a fast and quiet autofocus motor.
- Fokus Manual (MF): To manually focus, set your camera to MF mode. Rotate the focus ring on the lens barrel until your subject appears sharp in the viewpencari atau pada skrin LCD kamera.
4.3 Kawalan Apertur
The lens maintains a constant maximum aperture of F2.8 across its entire zoom range. Aperture settings are controlled through your camera body. Refer to your camera's instruction manual for details on adjusting aperture.
4.4 Close-Up Photography
The SIGMA 18-50mm F2.8 DC DN Contemporary lens excels at close-up photography, offering a minimum focusing distance of 12.1cm (4.8 inches) and a maximum magnification ratio of 1:2.8. This allows for detailed shots of small subjects.
5. Penyelenggaraan dan Penjagaan
5.1 Membersihkan Lensa
- Gunakan berus peniup untuk menghilangkan habuk dari permukaan kanta.
- For smudges or fingerprints, use a clean, soft microfiber cloth specifically designed for optical lenses. Apply a small amount of lens cleaning solution to the cloth, not directly to the lens.
- Clean the lens mount contacts with a dry, clean cloth.
- Never use organic solvents like paint thinner or benzene to clean the lens.
5.2 Penyimpanan
- Store the lens in a cool, dry place away from direct sunlight and high humidity.
- Pasangkan kedua-dua penutup kanta hadapan dan belakang apabila tidak digunakan untuk melindungi elemen optik.
- If storing for extended periods, consider using a desiccant to prevent mold growth.
5.3 Langkah Berjaga-jaga Pengendalian
- Avoid exposing the lens to extreme temperatures or sudden temperature changes.
- The lens mount is rubber-sealed for dust and splash resistance; however, it is not waterproof. Avoid direct exposure to water.
- Jangan jatuhkan atau tertakluk kepada hentaman kuat pada kanta.
6. Penyelesaian masalah
If you encounter issues with your lens, please refer to the following common troubleshooting steps before contacting support.
| Masalah | Kemungkinan Punca / Penyelesaian |
|---|---|
| Kanta tidak dikenali oleh kamera |
|
| Autofokus perlahan atau tidak tepat |
|
| Imej adalah kabur |
|
If the problem persists after trying these steps, please contact Sigma customer support or your authorized dealer.
7. Spesifikasi
| Ciri | Perincian |
|---|---|
| Jenama | Sigma |
| Nombor Model | 585972 |
| Panjang Fokus | 18-50mm |
| Apertur Maksimum | F2.8 (constant) |
| Jenis Kanta | Zum Standard |
| Pemasangan yang Serasi | Canon RF |
| Dimensi Produk | 3.5 x 3 x 3 inci (lebih kurang) |
| Berat Barang | 10.6 auns (lebih kurang) |
| Jarak Fokus Minimum | 12.1 cm (4.8 inci) |
| Nisbah Pembesaran Maksimum | 1:2.8 |
| Pengeluar | Sigma Corporation of America |
Catatan: Spesifikasi boleh berubah tanpa notis.
8. Waranti dan Sokongan
This product is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Sigma webtapak. Simpan bukti pembelian anda untuk tuntutan waranti.
For technical support, service, or inquiries regarding your SIGMA 18-50mm F2.8 DC DN Contemporary Lens, please contact Sigma Corporation of America customer service or your local authorized Sigma dealer.
Sumber Dalam Talian: For the latest information, firmware updates, and additional resources, please visit the official Sigma webtapak.