K&F Concept K&F M39 Lenses to Sony NEX E Mount Adapter

The K&F M39 to Sony NEX E-Mount Adapter allows Leica M39 mount lenses to be used on Sony E-mount mirrorless cameras, featuring durable brass and aluminum construction, manual operation, and support for infinity focus.

This adapter enables photographers to mount Leica M39 lenses on Sony E-mount mirrorless cameras, combining classic lens optics with modern digital performance. Compatible with a broad range of Sony NEX and Alpha cameras including NEX-3/5/6/7 series, a3000/a5000/a6000 series, and full-frame a7, a7S, and a9 models (metal mount required for some a7 series cameras), this adapter ensures a precise, stable, and secure connection. Constructed from high-quality brass and aluminum, it offers durability and long-lasting performance. Fully manual, it allows direct control over focus and aperture while supporting infinity focus. For heavier medium-format lenses, using a tripod or telephoto support bracket is recommended to maintain proper balance. The adapter is ideal for photographers looking to leverage vintage M39 lenses on Sony E-mount cameras.

Key Features

• Adapts M39 mount (Leica) lenses to Sony E / NEX / Alpha mirrorless cameras
• Brass and aluminum construction for stability, precision, and durability
• Manual focus and manual aperture operation
• Supports infinity focus
• Compatible with a wide range of Sony NEX and Alpha cameras (metal mount recommended for some a7 series)
• Secure and precise lens mounting
• Tripod or telephoto bracket recommended for heavy lenses

• K&F M39 to Sony NEX E-Mount Adapter
• Protective end caps (if provided; otherwise adapter only)

• Lens Mount (Lens Side) M39 (Leica)
• Camera Mount (Body Side) Sony E / NEX / Alpha
• Materials Brass + aluminum
• Operation Manual focus & manual aperture
• Infinity Focus Supported
• Flange Focal Distance 28.8mm
• Compatibility Sony NEX-3/3C/3N/5/5C/5N/5R/5T/6/7, NEX-C3, NEX-F3, NEX-VG10, a3000, a3500, a5000, a5100, a6000, a6300, a6500, a7S, a7, a7 II, a7S II, a7R II, a7R III, a9 (metal mount recommended for certain a7 series cameras)