The Kenko Teleplus Pro 300 DGX converter provides a 2.0 magnification for Canon EF lenses. The elements are  made of multi-coated optical glass supplied by the Hoya Corporation, designed to match the optical quality of  NIkon brand telephoto zoom and prime lenses, even at the edges. The optical design of the elements and light path are wide enough to prevent vignetting.

The Pro 300 converters are designed to work best with prime lenses over 100mm, and with telephoto lenses ranging between 200 - 500mm. Communication and signal integrity between the body and lens is maintained with Kenko’s Gate Array IC (Integrated Circuitry) technology. The Kenko Teleplus Pro 300 DGX is not compatible with any EF-S lenses.

Specifications

Model: 
Pro 300 AF DGX 2.0X

Mount:
Canon EOS AF

Compatible with:
Canon EF Lenses*

*Not compatible with EF-S Lenses

Magnification:
2.0x

Depth of field:
1/1.2 of prime lens

Minimum focus distance:
Same as prime lens

Diaphragm coupling:
Fully automatic

Lens coating:
Digital Multi Coating

Exposure magnification:
Approx 4 times (equivalent to 2 diaphragm)

Barrel length: approx.
2.0 inches (51 mm )

Weight:
6.4 oz.(184g)

Some lenses may work only in Manual focus