Descriptions:

They are designed specifically to be use with telephoto lenses of 100mm or above,
and work best with telephoto lenses of 200mm to 500mm. The PRO 300's can be
used with telephoto zoom lenses as well as prime lenses, but, due to their design,
Kenko does not recommend them for lenses that have a zoom range that starts
under 50 mm.Kenko PRO 300 converters are intended to be used with expensive
telephoto lenses and larger camera bodies.

Note: Kenko PRO 300 AF teleconverter will not auto focus with the following
Nikon lenses: Nikon AF-S ED 300mm f/2.8D (IF), Nikon AF-I ED 400mm
f/2.8D (IF), Nikon AF-S ED 500mm f/4D (IF), Nikon AF-S ED 600mm f/4D
(IF), Nikon AF-S ED 80-200mm f/2.8 (IF), Nikon AF-D ED 200mm f/4.


Specifications:

Construction: 4 Groups/ 7 Elements

Dimensions (Length x Diameter): 2.6 x 1.7 in.

Weight: 184g (6.5oz)

Notes: MultiCoated, Depth of Field: 1/2 of prime lens/Exposure
Magnification: Approx. 2 stops.


Mfr# K20PRO300DGN