The SIGMA 10-18mm F2.8 DC DN lens is a great choice for underwater photography, thanks to its ultra-wide focal length, fast aperture, and compact size.

Key Features:

• APS-C Format | f/2.8 to f/22
• 15-36mm (Full-Frame Equivalent)
• Ultra Wide-Angle Zoom
• Fast Internal Focus System
• Rounded 7-Blade Diaphragm
• Dust & Splash-Resistant Design
• Active image stabilizing system reduces camera shake
• 4.6" minimum focusing distance
• Maximum magnification ratio of 1:4 at the wide end

Ultra-wide focal length

The 10-18mm focal length is equivalent to 15-28mm on a full-frame camera, making it ideal for capturing sweeping underwater landscapes and close-ups of marine life. The ultra-wide angle of view also allows you to get close to your subject without having to back up, which can be important in tight underwater spaces.

Fast aperture

The fast f/2.8 aperture of the SIGMA 10-18mm lens lets you shoot in low-light conditions without having to increase your ISO setting, which can introduce noise into your images. The fast aperture also allows you to create a shallow depth of field, which can be used to isolate your subject from the background.

Compact size

The SIGMA 10-18mm lens is very compact and lightweight, making it easy to carry around on your dives. It is also compatible with a variety of underwater housings, so you can start shooting underwater right away.

Here are some additional benefits of the SIGMA 10-18mm lens for underwater photography:

• Sharpness: The lens produces sharp images throughout the zoom range, even at the corners of the frame.
• Color rendering: The lens produces accurate and vibrant colors, which is important for underwater photography.
• Build quality: The lens is well-built and weather-sealed, making it suitable for use in challenging underwater environments.
• Price: The SIGMA 10-18mm lens is very affordable, making it a great value for underwater photographers.