Attaches between the lens and body to increase the focal length by a factor of 1.7. Provides a convenient way to expand your range of lenses

• Focal length conversion factor: 1.7x
• Aperture reduction: -1.5 stops
• Length/diameter: 56mm/85mm
• Weight: 465g
• Compatibility: Compatible with all HC lenses except for HC 3.5/35mm and HC 3.5-4.5/50-110mm
• Lens Design: 6 lenses in 4 groups