Check out the Sony E 20mm F2.8 Pancake Lens's Key Features
(Sony SEL20F28)

• E-mount, APS-C format
• Ultra-slim (20.4mm) and lightweight, with metal finish
• Aspherical lens elements reduce distortion and aberration
• Circular aperture for attractive defocusing
• Smooth, quiet autofocus operation
• APS-C camera equivalent focal length: 30mm

OVERVIEW

Shooting stills or movies, this slim (20.4mm), lightweight pancake lens offers outstanding performance. Use it for interiors, nature, snapshots and more. Coupled with a E-mount cameras from Sony, APS-C E-mount lenses deliver big camera performance.

FEATURES

• From a vast cliff to a stretching sandy beach, fit everything in with a 20mm wide angle (30mm in 35mm equivalent focal length) - With interchangeable-lens cameras incorporating APS-C type image sensor.
• Three parts inside the lens work together to fix blur and distortion, even the outer edges of your photos will be crisp and clear.
• Preparing for a day's shoot? Slip this 'pancake' lens into your kit bag, a focal length of just 20mm won't take up much space.
• An easy-grip ring on the lens barrel helps you control whether your subject is sharply in focus or blurred against the background.
• This fixed lens has a bright, wide aperture of F2.8 so you can capture atmospheric shots even at dusk.
• The sleek aluminium design adds a stylish touch wherever you're shooting.