Adapter Ring Lens Adapter Ring Meike MK-C-AF4 for Canon EF/EF-S - AF

In this review the Meike MK-C-AF4 adapter ring is evaluated as a practical solution for EOS-M mirrorless users who want to keep using EF and EF-S lenses. The bottom line: it fits solidly, adds an automatic focus function so critical moments are not missed, and includes a 1/4in screw hole for tripod mounting, making it a compact, dependable bridge between lens and camera. For photographers who already own Canon EF glass and need a straightforward adapter with AF support, this adapter is worth considering.

Key Features

• Mount Compatibility: Lets EOS-M mount mirrorless cameras accept EF and EF-S lenses so shooters can use an existing lens collection.
• Auto Focus Function: Retains automatic focus capability so users can preserve convenient AF operation with many lens and camera combinations.
• 1/4in Screw Hole: A tripod-mountable 1/4in screw hole on the adapter bottom improves stability when using heavier lenses on a small body.
• Easy Installation: A red-dot alignment and audible click make attaching and detaching lenses straightforward and repeatable in the field.
• Safe and Reliable Fit: Precision-machined mounting interfaces minimize play and protect both camera and lens from damage.

Who It's For

The adapter is ideal for photographers who own EOS-M mirrorless bodies and a collection of Canon EF or EF-S lenses and want to keep autofocus functionality while avoiding a second set of glass. It suits travel and event shooters who need quick swaps and reliable mounting without bulky conversion rigs.

Those who require full electronic communication for advanced lens features on every possible lens may need to verify compatibility with specific lens models, and photographers seeking in-body stabilization or feature parity across all lenses should confirm behavior with their camera body before relying on it for professional assignments.

Pros & Cons

Pros

• Restores AF for many EF/EF-S lenses on EOS-M cameras, preserving quick focusing for run-and-gun shooting.
• Robust metal construction gives a reassuring, durable connection between lens and camera.
• Built-in 1/4in screw hole allows easy tripod attachment for better balance with heavy lenses.

Cons

• Autofocus performance can vary by lens and camera combination, so results are not guaranteed for every pairing.
• Limited to mechanical and electronic compatibility implied by the mount; advanced lens features may not be fully supported in all cases.

Specifications

Condition	100% Brand New
Brand	Meike (Qinlorgo listed)
Material	Metal
Compatible Cameras	EOS-M mount mirrorless cameras
Compatible Lenses	EOS EF and EF-S lenses
Size (Dia x H)	Approx. 7 x 4.5cm
Weight	Approx. 98g

Our Verdict

The Meike MK-C-AF4 adapter ring is a sensible, good-value accessory for EOS-M users who want to continue using EF/EF-S lenses without losing autofocus entirely. Its solid metal build, easy alignment, and tripod screw hole make it a practical choice for enthusiasts and hybrid shooters, though those needing guaranteed, high-speed AF with every lens should test their exact lens and body pairing first.

Frequently Asked Questions

Will this adapter allow autofocus with all EF lenses?
Autofocus works with many EF and EF-S lenses, but performance varies by lens and camera combination, so testing specific pairings is recommended.

Can I mount this on a tripod?
Yes, the adapter includes a 1/4in screw hole on the bottom for attaching to tripods or quick-release plates.

Is the adapter safe for my camera and lenses?
Yes, the mounting interfaces are precision-machined to provide a secure fit and to avoid harming camera or lens mounts when used properly.