The Voigtlander 40mm f/2 Ultron SL-II is an ultra-compact wide-angle prime for Canon EF-mount cameras. Key features include:

Macro Conversion Lens and Adapter Included. The Voigtlander 40mm f/2 Ultron SL-II includes a close-up (macro) conversion lens that offers a 9.85-inch minimum focusing distance. The close-up lens is attached via an included 52-39mm adapter, which also lets you attach 39mm filters and serves as a lens hood to deflect unwanted light and protect the lens. On APS-C sensors, this lens gives you a 60mm focal length after sensor-crop factor.

Manual Focus. This lens offers a smooth manual-focus system for precision control.

Advanced Optical Design. Its optical design includes multi-coated, aspherical elements that help to produce sharp images while combating aberrations.

Communicates Metering and Exposure Info to the Camera. This lens’s CPU passes metering and exposure information to the camera. It also auto-functions with virtually every compatible Canon 35mm and DSLR.