KENKO Teleplus Pro 300 DGX converters are
made with precision quality multi-coated optical glass supplied by Hoya
Corporation, the worlds largest manufacturer of optical glass. These
glass elements were designed to match the optical quality of the prime
lens (even at the edges) and telephoto zoom lenses. The optical design
of the elements and light path is wide enough not to cause vignetting.
The PRO 300 family are designed specifically to be used with prime
telephoto lenses of 100mm or above, such as 300 mm f/2.8 lenses, and
work best with telephoto lenses of 200mm to 500mm. The PRO 300 can be
used with telephoto zoom lenses as well as prime lenses. However, Kenko
does not recommend them for zoom lenses that have a range starting under
50 mm.
KENKO PRO 300 AF Teleplus converters have genuine Gate Array IC
(Integrated Circuitry). It means that the converter’s own unique
circuitry maintains signal integrity between the camera body and lens.
These converters are designed to electronically operate the same way as
an original manufacturer’s converter.1
Full AF operation with PRO 300 2.0x DGX is possible when using
camera lenses with maximum aperture of F2.8 or brighter. Please be aware
that AF will work properly only if there is enough light and contrast
on the subject to activate the camera’s AF sensors. (Manual focusing is
required when using lenses with smaller maximum f-stop value than those
given above.)
With the PRO 300 1.4x, DGX full AF operation is possible with camera
lenses having a maximum aperture of F4 or brighter. The same light and
contrast requirements apply.
The DGX Teleplus converters have updated circuitry to record exif
data more accurately. In the exif exposure data (meta-data recorded with
a digital picture) DGX converters record the equivalent aperture and
focal length of the lens setting plus tele-converter. Optically and
mechanically they are the identical to the prior high-quality DG series
converters.
1. Most Canon EOS camera bodies are programmed to shut down auto
focus if the calculated effective aperture for the lens and
teleconverter is smaller than f/5.6, the Kenko Teleplus PRO 300
converters work the same way.
Specifications |
|---|
| Magnification | 3.0x |
| Construction E/G | 7E / 4G |
| Coatings | Digital Multi Coating |
| Depth of Field | 1/3 of prime lens |
| Minimum Focus Distance | 0.0 ft (Same as prime lens m) |
| Exposure Magnification | Approx. 3 times (equivalent to 3 diaphragm) |
| Diaphragm Coupling | Manual focus |
| Barrel Length | 2.6 in (65mm) |
| Weight | 5.3 oz (149g) |
| Available Mounts | Canon-EOS*, Nikon-AF |
| Notes | *Canon EF-S lenses are not applicable. |
| Warranty | 1 Year Limited Warranty |
