Canon

Canon CAN104 EF 25 II Extension Tube

4.3 (239 reviews)

Enhance Your Close-Up Photography with This Extension Tube The Canon EF 25 II Extension Tube is designed to enable high-magnification photography by positioning between the camera body and lens. This accessory maintains communication between the camera and lens via eight electronic contact point...

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

Enhance Your Close-Up Photography with This Extension Tube

The Canon EF 25 II Extension Tube is designed to enable high-magnification photography by positioning between the camera body and lens. This accessory maintains communication between the camera and lens via eight electronic contact points, ensuring normal operation of metering and autofocus functions. The magnification achieved varies depending on the specific lens used. Designed with high-quality materials, this extension tube offers durability and reliability for professional use.

Specifications:

  • Compatibility: Canon EF Lenses
  • Electronic Contacts: 8
  • Functions Retained: Metering and AF
  • Construction: High-Quality Materials
  • Mount: Canon EF

Key Features

Retains all metering and AF functions with most CANON EF lenses

High level water and dust resistance -- suitable for use in heavy rain

O-ring seals protect mounts and release lever

Specifications

Brand
Canon
Model
EF 25 II Extension Tube
Lens Compatibility
Most Canon EF Lenses
Metering Functions
Retained
Autofocus Functions
Retained
Weather Resistance
High level water and dust resistance
Seal Type
O-ring seals

Pros & Cons

👍 Pros

  • Maintains full metering functionality with most Canon EF lenses when attached.
  • Retains all autofocus (AF) functions when used with compatible Canon EF lenses.
  • Offers a high level of water and dust resistance, making it suitable for use in heavy rain.
  • Features O-ring seals that protect both the lens and camera mounts from environmental elements.
  • Equipped with a secure release lever to ensure stable and confident attachment.

👎 Cons

  • This extension tube is specifically for Canon EF lenses, limiting its compatibility with other lens types.
  • The product title specifies "II," indicating it's a particular version, which might imply prior iterations or specific compatibility requirements.
  • Its specialized function as an extension tube means it's not a general-purpose accessory for all photography needs.
  • The need for O-ring seals implies a level of precision and care in handling to maintain its weather resistance.
  • While retaining AF, performance might vary depending on the specific lens and lighting conditions due to the extended focal length.

Frequently Asked Questions

The Canon EF 25 II Extension Tube retains all metering and AF functions with most Canon EF lenses, but compatibility may vary with specific models.
Yes, it offers a high level of water and dust resistance, making it suitable for use even in heavy rain.
No, this extension tube is designed to retain all autofocus (AF) functions with most compatible Canon EF lenses.
The extension tube features O-ring seals that provide protection for both the lens and camera mounts, guarding against water and dust ingress.
An extension tube is primarily used to increase the magnification of a lens, allowing for closer focusing distances, which is beneficial for macro photography.