Lens Mount Adapter for Nikon G F AI AIS to Sony E Mount - Aperture

In this review the adapter is judged on practicality and compatibility for photographers who want to use Nikon F lenses on Sony Alpha E-mount bodies. The bottom line: it is for hobbyists and pros who value mechanical control and infinity focus without electronics. The adapter's standout feature is a built-in aperture control ring that allows stop-down metering on Sony cameras, and the review focuses on fit, build, and optical reliability when adapting a wide range of Nikon G, F, AI and AIS lenses.

Key Features

• Aperture control ring: Allows mechanical adjustment of iris for lenses without built-in aperture, enabling AE priority and manual stop-down metering on compatible Sony bodies.
• Wide lens compatibility: Accepts Nikon G, F, AI and AIS mount lenses so a broad collection of vintage and modern Nikkor glass can be used on Sony E-mount cameras.
• Infinity focus preserved: The adapter allows infinity focus with a small calibrated shift marked by an L-shaped line to maintain focus stability across temperature changes.
• Smooth mounting surface: Metal surfaces and precise machining give an effortless mount and firm lock between lens and camera for steady shooting.
• Metering support: Supports AE priority and manual stop-down metering on compatible Sony Alpha and NEX bodies for practical exposure control.

Who It's For

The adapter suits photographers who own Nikon F-mount lenses and want to use them on Sony Alpha a7 series or older NEX cameras, while retaining mechanical aperture control and metering. It is particularly useful for owners of G-type and manual AI/AIS lenses who need a simple, robust adapter rather than electronic coupling.

Those who rely on autofocus, electronic lens data, or want full compatibility with later Sony models such as a7 II series or a7R II should look elsewhere, because this adapter provides no electronic communication and is not compatible with certain Sony bodies listed in the product notes.

Pros & Cons

Pros

• Works with a wide range of Nikon F lenses including G, F, AI and AIS types for maximum lens reuse.
• Built-in aperture control ring gives practical stop-down metering and manual exposure control on many Sony bodies.
• Solid mechanical fit and smooth surface make lens mounting quick and reliable in the field.
• Infinity focus is preserved with a small calibrated shift so telephoto focus is reliable across temperatures.

Cons

• No electronic contacts so autofocus, EXIF lens data and electronic aperture transmit are not available.
• Some Nikon AI lenses can be mounted but may not operate the aperture control ring due to physical pin differences.

Specifications

Brand	Kent&Faith Concept
Mounts supported	Nikon G / F / AI / AIS lens to Sony E mount
Metering support	AE Priority and Manual Stop-down Metering
Aperture control	Built-in aperture control ring (mechanical)
Infinity focus	Preserved with slight calibrated shift (L-shaped mark)
Compatible cameras	Sony Alpha a7, a7r, a7s and many NEX bodies (not compatible with a7 II, a7S II, a7R II)

Our Verdict

This adapter is a practical, low-cost way to extend Nikon F lenses to Sony E-mount bodies while retaining manual aperture control and reliable infinity focus. It offers excellent value for photographers who shoot manual or stop-down exposure and who do not require autofocus or electronic lens data. For anyone preserving a lens collection, it is a sensible mechanical solution.

Frequently Asked Questions

Will autofocus work?
Autofocus and electronic lens data are not supported; this adapter is mechanical only.

Can AI lenses use the aperture ring?
AI lenses can be mounted but the aperture control ring may not function with some AI lenses because of the Nikon G pin design.

Does infinity focus work?
Yes, infinity focus is allowed; the adapter uses a slight positive shift marked by an L-shaped line to maintain focus accuracy.