With an effective focal length extension of 2x, it is designed for the 645 lenses shown in the following chart.
Recommended for New Effective Focal Length & Aperture
150mm f/2.8 300mm f/5.6
150mm f/3.5 300mm f/7
210mm f/4.0 420mm f/8
300mm f/5.6 600mm f/11
300mm f/2.8 600mm f/5.6
500mm f/5.6 1000mm f/11
500mm f/4.5 1000mm f/9
145mm f/4 Soft Focus 290mm f/8
50mm f/4 Shift 100mm f/8
Due to physicial limitations, the Tele-Converter cannot be used with zoom lenses or with lenses not shown on the chart above.