Product options:
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.
Usable Lenses and Combinations
Attaching the APO Tele Converter to the Lens
Focusing
Exposure
| Lens Construction | 5 elements in 3 groups |
| Focal length | 1.4x that of a master lens |
| Aperture coupling range | F2.8 - F32 |
| Reproduction ratio | 1.4x that of a master lens |
| Dimensions (Diameter×Length) | Φ68.5mm×19.5mm / 2.7in.×0.8in. |
| Weight | 160g / 5.6oz. |
Brand: Sigma |
Code:
4824940
Product options:
Brand: Sigma |
Code:
4824940
At a glance
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.