A short telephoto focal length combined with a large maximum aperture & fast autofocus speed make the EF 85 mm. f/1.8 USM an ideal optic for any photographer shooting portraiture. Features Fast f/1.8 aperture Short/medium telephoto lens USM focus motor with full-time manual focus 85 cm. closest focusing distance 58 mm. filter size Super Spectra coatings reduce ghosting & flare A very popular short telephoto lens with portrait photographers. A practical & portability telephoto lens. The EF 85 mm. f/1.8 USM produces images that are sharp & clear at all apertures. A virtually circular aperture diaphragm gives out-of-focus regions a softer more even feel & lets in-focus subjects stand out against a blurred background. The lens features a non-rotating front element during focusing enabling specialist filters (such as polarisers & graduates) to be used. Large f/1.8 aperture. A large maximum aperture of f/1.8 lets photographers shoot h&-held in difficult low-light conditions as well as restrict depth-of-field for creative effects. Compressed perspective in portraiture. The short telephoto focal length of the lens slightly compresses perspective reducing the size of prominent facial features for a flattering result. Ultrasonic focusing. A ring-type ultrasonic motor drives autofocus extremely quickly & in near silence. Excellent holding torque ensures the point of focus is reached accurately without overshooting. Furthermore full-time manual override is available making it possible to adjust focus without leaving AF mode. Super Spectra coating. Super Spectra coatings ensure accurate colour balance & enhance contrast. They also reduce flare & ghosting a common problem caused by light bouncing off a cameras sensor. Integration with E-TTL II flash metering. The lens passes distance information back to a compatible EOS cameras E-TTL II flash system to ensure optimal flash metering. Features Zoom Type. Fixed Lens.