DG-C Auto-Focusing Macro Lens Extension Tube for Canon EF/EF-S

In this review of the DG-C auto-focusing extension tube set, the bottom line is simple: photographers who want affordable, flexible macro capability for Canon EF and EF-S DSLR systems will find this kit useful. The set includes three metal-mounted extension tubes (12mm, 20mm and 36mm) that attach between body and lens to increase magnification without optical elements. It is best for hobbyists and content creators seeking close-up capability without buying a dedicated macro lens, and it delivers usable auto focus with single rings while offering stable electronic communication thanks to gold-plated pins.

Key Features

• Three tube lengths: The 12mm, 20mm and 36mm tubes can be used singly or in combinations to provide seven magnification options for flexible close-up work.
• Canon EF/EF-S compatibility: Designed to mount with Canon EF and EF-S lenses and a wide range of Canon DSLR bodies, expanding lens and camera combinations for macro shooting.
• Metal bayonets: Metal mounts with surface plating give a durable interface that resists wear during repeated mounting and dismounting.
• Electronic communication: Gold-plated signal pins maintain aperture and EXIF transmission so lenses keep electronic control and metering functionality.
• Inner surface treatment: The interior finish reduces internal reflections for cleaner, higher-contrast close-up images.

Who It's For

This extension tube set is ideal for amateur macro photographers, product shooters, and nature hobbyists who already own Canon EF or EF-S lenses and want low-cost close-up capability. It suits users who understand the tradeoffs of extension tubes and can manage manual focus when stacking tubes.

It is less suitable for professionals who require the fastest autofocus or the highest build tolerances from every accessory, or for shooters who rely on ultra-wide lenses under 70mm focal length and expect to stack multiple rings frequently.

Pros & Cons

Pros

• Affordable way to achieve macro magnification without buying a dedicated macro lens.
• Good electronic connectivity and retained aperture control thanks to gold-plated pins.
• Solid metal bayonets feel durable and smooth when mounting.
• Multiple length options allow fine control over magnification for different subjects.

Cons

• Build quality opinions are mixed; some users report the overall finish and tolerances are not premium.
• Auto focus works reliably with single rings but often requires switching to manual focus when stacking two or three tubes, especially on lenses under 70mm.

Specifications

Product type	Extension tube set
Compatible mounts	Canon EF / EF-S
Tube lengths	12mm, 20mm, 36mm
Diameter	68mm
Mount material	Metal bayonets with plating
Electrical contacts	Gold-plated signal pins

Our Verdict

The DG-C extension tube kit is a practical, value-minded choice for Canon DSLR owners who want to experiment with macro photography without investing in a macro lens. It preserves electronic control, offers multiple magnification options, and uses metal mounts for reasonable durability; buyers who prize ultra-robust construction or constant autofocus when stacking tubes should consider whether manual focus will be acceptable for their workflow.

Frequently Asked Questions

Will autofocus work with these tubes?
Autofocus typically works when using a single tube, but when stacking two or three tubes autofocus may become unreliable and manual focus is recommended.

Are these compatible with my Canon DSLR?
Yes, the kit is designed for Canon EF and EF-S mount cameras and lists broad compatibility with many Canon DSLR models.

Can I stack all three tubes?
Yes, you can combine 12mm, 20mm and 36mm tubes for maximum magnification, but avoid stacking on lenses shorter than 70mm and be prepared to focus manually.