Canon Extension Tube EF 12 II for EF and F-S and TS-E Lenses - Black | Teleconverters

Canon Extension Tube EF-12 II for Canon EOS series digital SLR cameras.

Mount Type:: Canon

Mount Type:: This is the mount type for the lens to attach to the camera body.

Canon Extension Tube EF 12 II

-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

CANON EF Extenders increase the power and versatility of existing lenses. EF Extenders work by increasing the distance between the film plane (or CCD) and the rear element of the lens. The extra distance increases the effective focal length of the lens to bring distant subjects closer.

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Specifications

Brand
Canon

Physical Specifications
Length:	2.3 in.
Length: The measurement of something from end to end. View All Attribute Definitions

Brand
Brand:	Canon
Brand:	Canon

Lens Specification
Lens Magnification Factor:	No
Lens Magnification Factor: This is the magnifying factor of a lens. Macro lenses will often be described by their “magnification factor”. A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject. View All Attribute Definitions
Elements / Groups:	3.4 in.
Elements / Groups: The individual pieces of glass that form the overall optical construction. Most lenses have between four and eleven elements to bend the light rays to ensure a perfectly formed image appears on the light sensitive surface, such as a film or CCD. The elements are arranged in groups and may be seen in specification sheets as, for example, 6 elements in 4 groups. That configuration may have two single elements and the other four grouped in pairs. View All Attribute Definitions
Lens Type:	Extender
Lens Type: This is the type of lens. View All Attribute Definitions
Focus Drive:	2.8 in.
Focus Drive: The internal autofocus drive of a lens. View All Attribute Definitions
Angle of View (diagonal):	8 elements in 6 groups
Angle of View (diagonal): Area of a scene that a lens covers or sees. Determined by the focal length of the lens View All Attribute Definitions
Focus Type:	Auto / Manual
Focus Type: The type of focus of the lens from full manual control to auto focus. View All Attribute Definitions
Mount Type:	Canon
Mount Type: This is the mount type for the lens to attach to the camera body. View All Attribute Definitions