Sigma APO Tele Converters are dedicated to Sigma lenses such as the APO 70-200mm f/2.8 EX DG and APO 300mm f/2.8 EX DG. They increase the focal length by 1.4 or 2 times. By providing a longer focal length, they allow greater flexibility, which is useful for taking sports of nature photographs.
The 1.4 EX is placed between the lens and the camera, and allows the photographer to use the 70-200mm f/2.8 lens as a 98-280m f/4 lens, and the 300mm f/2.8 lens as a 420mm f/4 lens; the high optical performance is maintained and the AF speed is not affected.
| Main Specification |
1.4x
|
2x
|
| Lens construction |
5 elements in 3 groups
|
6 elements in 5 groups
|
| Focal length |
1.4x that of a master lens
|
2x that of a master lens
|
| Aperture coupling range |
F2.8 - F32
|
F2.8 - F32
|
| Reproduction ratio |
1.4x that of a master lens
|
2x that of a master lens
|
| Dimensions |
68.5 X 19.5mm
|
68.5 X 52mm
|
| Weight |
143g (5oz.)
|
234g (8.3oz.)
|
| SRP |
£239.99
|
£289.99
|
|
Dimensions and weight based on the Nikon mount.
|
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