With a simple flick of a switch, the zoom range can be quickly increased to 280-560mm (f/5.6). This capability is extremely useful in applications where it is not possible to change lenses quickly, while also protecting delicate equipment such as a digital SLR camera’s image sensor in environments with dust and high humidity.

Extender 1.4X incorporates one fluorite and four UD lens elements, which provide excellent correction of chromatic aberration throughout the entire zoom range for professional quality images with high resolution, contrast and colour fidelity, while a 9-blade circular aperture helps deliver beautiful, soft backgrounds It utilises inner focusing, ring USM, a high-speed CPU and optimised AF algorithms for fast and accurate autofocusing.