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Black Canon EF 25 II extension tube, 25mm length, metal mount, electronic contacts visible

Canon

Canon Extension Tube EF 25 II 9199A001

SKU CH-KG08-16X2X

A 25 mm extension tube that lets EF and TS-E lenses focus closer for macro photography on any EOS camera

  • TypeAccessory
  • Enables closer focusing with 25 mm extension
  • Maintains autofocus and aperture control electronically
  • Compatible with EF, EF-S and TS-E lenses
  • Works on any EOS film or digital SLR body
  • Durable Canon construction for professional use

Close-Up Photography Accessory

The Canon Extension Tube EF 25 II enables closer focusing distances for macro and detail work. It fits between the camera body and compatible EF or TS-E lenses to reduce the minimum focusing distance. The 25 mm length suits a wide range of close-up subjects such as jewellery, artwork and small objects. Autofocus and electronic communication are maintained through the tube.

Passive Optical Design

The tube contains no glass elements so it adds no optical aberrations and draws no power from the camera. Operation is silent and produces no heat during use. Exposure compensation may be required on cameras other than the EOS-1 series because the effective aperture changes with extension. The mechanical mount preserves full electronic coupling between lens and body.

Upgrade From Close-Up Filters

Photographers currently using screw-in close-up lenses or diopters gain higher optical quality and retained autofocus with this tube. It replaces makeshift macro setups that degrade edge sharpness or disable electronic functions. The jump is worth it when you need consistent, repeatable magnification without sacrificing lens performance or metadata.

Highlights

  • Enables closer focusing with 25 mm extension
  • Maintains autofocus and aperture control electronically
  • Compatible with EF, EF-S and TS-E lenses
  • Works on any EOS film or digital SLR body
  • Durable Canon construction for professional use

Specifications

BrandCanon
Model9199A001
TypeAccessory

Questions about this item

How do I install the EF 25 II extension tube, and which step is commonly missed?

Mount the tube between the camera body and EF or EF-S lens using the bayonet mounts; the step often missed is enabling exposure compensation on non-EOS-1 series bodies because the tube reduces light transmission.

What maintenance or replacement will the EF 25 II need over time?

The tube has no moving parts or electronics; only the metal bayonet mounts and electrical contacts may eventually wear from repeated attachment cycles, requiring replacement of the tube itself.

What limit appears first when using the EF 25 II for sustained close-up work?

The 25 mm fixed extension sets a single magnification gain; you cannot increase working distance or magnification further without adding another tube or changing lenses.

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