The Canon EF – 12 II Extension Tube is installed between the prime lens and the camera body. It is a simple way to enable close-ups at high magnifications by increasing the distance between the lens and the film plane enabling focusing at closer distances than otherwise possible.
The result of using extension tubes is that the distance from the back of the lens to the film surface is longer, which means you can take photographs at shorter distances to the subject. Canon EF – 12 II Extension tubes are thus commonly used for macro photography and sometimes for closeup portraits.
When using the camera’s TTL metering system, no exposure compensation will be required (exposure compensation is required for handheld meters).
This updated version II is now also fully compatible with Canon Digital EF-S lenses, as well as standard photo EF and TS-E lenses.
Canon EF – 12 II Extension Tube is especially suited for close-focusing with wide-angle lenses. Compatible with all lenses, except 15mm f/2.8 fisheye, 14mm f/2.8L and MP-E 65mm f/2.8.
- Shortens focusing distance of lens
- White-index mark provided for digital SLR EF-S lenses
- Compatible with digital EF-S lenses, as well as EF and TS-E lenses
- Red mark provided for photo lenses