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Black anodised aluminium cylinder 31mm long with Canon EF electronic contacts

Fotodiox

Fotodiox Pro Auto Macro Extension Tube 31mm for Canon EOS EF/EF-s

SKU CH-EEG1-N7B59

A 31 mm extension tube enables extreme close-up photography with Canon EOS EF and EF-s lenses while preserving autofocus and auto-exposure

  • Enables extreme close-up photography with 31mm extension
  • Preserves original lens optical quality without added glass
  • Maintains autofocus and auto-exposure via electronic contacts
  • Anodized aluminium construction provides smooth mounting surface
  • Compatible with extensive range of Canon EOS cameras

Macro Extension Tube 31mm for Canon EF

The Fotodiox Pro Auto Macro Extension Tube adds 31mm of spacing between a Canon EOS body and an EF or EF-S lens to enable extreme close-up photography. Electronic contacts preserve autofocus and auto-exposure communication so the lens behaves normally at high magnification. Anodised aluminium construction provides a smooth mount surface and durable alignment. It suits photographers who want macro capability without buying a dedicated macro lens.

Simple Installation with Electronic Coupling

The tube mounts like a standard lens adapter, requiring no tools or firmware updates. Electronic pins transfer focus and exposure data, so autofocus remains active though hunting can increase at very close distances. Infinity focus is retained when the tube is removed, but the added extension prevents infinity focus while attached. Ensure both camera and lens contacts are clean to maintain reliable communication.

Consistent Performance During Extended Sessions

Passive construction means no batteries or heat-generating electronics, so behaviour stays stable during long macro shoots. Optical quality depends entirely on the attached lens because no glass elements are introduced. The rigid aluminium barrel resists flex that could shift focus during repeated actuations. Photographers needing weather sealing or internal focusing mechanisms should note the tube adds physical length without environmental protection.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 70% of the 3,838 comparable items (median $41.99).

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the tube is communicating autofocus and auto-exposure correctly after mounting it?

Mount the tube between the Canon EOS body and EF or EF-S lens, then half-press the shutter; the focus points should light and the aperture value should appear in the viewfinder or on the LCD, showing full electronic communication is active.

What comes in the box and do I need to buy anything else to use it?

The package contains the 31 mm anodized aluminium extension tube only; you supply the Canon EOS camera body and an EF or EF-S lens, no additional adapters or cables are required.

This model is a single 31 mm tube — how do I decide whether that length suits my close-up needs?

A 31 mm tube gives a fixed magnification boost; choose it when you want a moderate working distance increase — shorter tubes give less magnification, longer tubes or stacked tubes give more.

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