Conversion factors:
- 2x the focal length (e.g. 100mm lens with this mounted becomes 200mm effective)
- two additional stop effective aperture (e.g. f/4 becomes f/8)
Optic design:
- 8 elements in 5 groups
- 1 aspherical element
- Fluorine coated
Supported Lenses:
- 70-200mm f/2.8 S
- Not compatible with FTZ adapter
Focus:
- Lens maintains original focus distance when mounted
Size and weight:
- 1.3" (32.5mm) long
- 2.9" (72mm) diameter
- 9.6 ounces (270g)
Price: US$599