Sigma 40mm f/1.4 DG HSM Art Lens User Manual

Introduction

The Sigma 40mm F1.4 DG HSM Art lens is designed to deliver exceptional optical performance, meeting the rigorous standards of professional photography and cinematography. This lens is Sigma's first to be developed with the sought-after angle of view and performance standard of a benchmark cine lens, offering both 8K-compatible resolution and beautiful bokeh.

This manual provides essential information for the proper use, care, and maintenance of your Sigma 40mm F1.4 DG HSM Art lens.

Key Features

• Advanced Optical Design: Incorporates three FLD ("F" Low Dispersion) glass elements to effectively correct chromatic aberrations and deliver superior image quality.
• High Resolution and Beautiful Bokeh: Engineered for 8K-compatible resolution with less than 1% distortion and near non-existent sagittal coma flare, while also producing a pleasing background blur.
• Durable Build Quality: Constructed with robust materials for reliable performance in various shooting conditions.
• Fast and Accurate Autofocus: Equipped with a Hyper Sonic Motor (HSM) for quiet, high-speed, and precise autofocus.
• Versatile Compatibility: Available for various camera systems, including Sony E-mount.

What's in the Box

Upon opening the package, please ensure all the following items are present:

• Sigma 40mm f/1.4 DG HSM Art Lens
• Lens Hood
• Lens Case
• Front Lens Cap
• Rear Lens Cap
• Instruction Manual (this document)

Setup

Attaching the Lens to Your Camera

1. Ensure both the camera and lens are powered off.
2. Remove the rear lens cap from the lens and the body cap from your camera.
3. Align the mounting index mark on the lens (usually a white dot or line) with the corresponding index mark on your camera's lens mount.
4. Insert the lens into the camera mount and rotate it clockwise (for Sony E-mount) until it clicks securely into place. Do not force the lens.
5. To detach the lens, press the lens release button on your camera body and rotate the lens counter-clockwise until it detaches.

This image displays the rear of the Sigma 40mm f/1.4 DG HSM Art lens, focusing on the metal lens mount and electronic contacts. This is the part that connects directly to your camera body.

Attaching the Lens Hood

The included lens hood helps to block extraneous light, reducing flare and ghosting, and also provides physical protection for the front element of the lens.

1. Align the lens hood's mounting mark with the mark on the front of the lens barrel.
2. Twist the hood clockwise until it clicks into place.
3. To store the hood, reverse its direction and attach it to the lens barrel.

This image shows the Sigma 40mm f/1.4 DG HSM Art lens with its petal-shaped lens hood securely mounted on the front. The hood extends forward from the lens barrel.

Operating the Lens

Focus Mode Switch (AF/MF)

The lens features a switch on its barrel to select between Autofocus (AF) and Manual Focus (MF) modes.

• AF (Autofocus): Set the switch to AF for automatic focusing. The camera will control the lens's focus.
• MF (Manual Focus): Set the switch to MF to manually adjust focus by rotating the focus ring on the lens.

This image provides a side view of the Sigma 40mm f/1.4 DG HSM Art lens, clearly showing the AF/MF (Autofocus/Manual Focus) switch located on the left side of the lens barrel.

Autofocus Operation

When the lens is set to AF, the camera's autofocus system will take control. Half-press the camera's shutter button to activate autofocus. The Hyper Sonic Motor (HSM) ensures fast and quiet focusing.

Manual Focus Operation

In MF mode, rotate the large focus ring on the lens barrel to adjust focus. Use your camera's focus peaking or magnification features for precise manual focusing.

Understanding the Distance Scale

The lens features a distance scale window, indicating the current focus distance in both meters and feet. This can be useful for zone focusing or when precise distance information is required.

This image shows the front-facing view of the Sigma 40mm f/1.4 DG HSM Art lens, prominently displaying the distance scale window with markings in feet and meters, as well as aperture values.

Maintenance and Care

• Cleaning the Lens: Use a soft, lint-free cloth or a lens brush to remove dust. For smudges or fingerprints, use a specialized lens cleaning solution and a microfiber cloth. Never use abrasive materials or harsh chemicals.
• Storage: When not in use, store the lens with both front and rear caps attached in a cool, dry place, away from direct sunlight and extreme temperatures. Using the provided lens case is recommended for added protection.
• Handling: Avoid dropping or subjecting the lens to strong impacts. Do not attempt to disassemble the lens, as this will void the warranty and may cause damage.
• Moisture: Protect the lens from rain, splashes, and high humidity. If the lens gets wet, wipe it dry immediately with a soft cloth.

Troubleshooting

Specifications

Warranty and Support

Sigma products are manufactured with high-quality materials and undergo strict quality control. For information regarding the warranty period and terms, please refer to the warranty card included with your product or visit the official Sigma website for your region.

For technical support, repairs, or any inquiries regarding your Sigma 40mm f/1.4 DG HSM Art lens, please contact Sigma customer service or an authorized service center in your country. Contact details can typically be found on the official Sigma website or in the product packaging.