The Pentax 1.4x HD PENTAX-DA AF Rear Converter AW is a teleconverter designed for Pentax K-mount DSLRs. Key features include:
- 40% Focal Length Increase. This Pentax 1.4x converter provides 40% more reach to compatible lenses with only 1-stop of light loss while retaining autofocus capability.
- High Quality Build. The durable, weather-resistant construction offers peace of mind when shooting in less-than-ideal conditions. It features Pentax’s HD lens coating that maximizes image sharpness through eliminating flare and ghosting. At just 0.8" thick and 4.4oz in weight, you won’t even notice it in your bag.
- Compatibility. Due to the recessed elements, this converter supports just about any Pentax K-mount. Both camera-driven focus systems and lens-driven systems (SDM and DC-series) are fully compatible. However, do note autofocus will only work with lenses with a maximum aperture of f/4 or faster.