Canon has announced a new 40mm f/2.8 'pancake' lens for full-frame cameras. The 40mm has a electro-magnetic diaphragm (EMD - a feature of all EOS lenses) which is said to have 'full control' over the diaphragm - presumably step-less control as per cine lenses, but we're waiting for confirmation. The new lens also features a stepper motor (STM) particularly favored for use with CD AF systems, permitting 'smoother' AF during video capture than previous ring-type or ultrasonic motors.
Indeed this suggests Canon thinks a new motor type is necessary for CD AF systems to work effectively during video capture and has released the new EOS Rebel T4i / 650D with a hybrid CD/PD-AF system (located on the CMOS imaging chip). Although Canon has also intoduced a EF-S 18-135mm STM zoom to accompany the new camera, the 40mm f//2.8 is a full-frame lens, so we can expect to see a new full-frame video-enabled camera from Canon with a hybrid CP/PD AF system in the near future. Could this be the mirrorless camera Canon is rumoured to be launching this year?
The EF 40mm f/2.8 STM is available from 15th June 2012, priced at $199 / £229.99/Euro 279.99 RRP incl. VAT.
From the press release:
EF 40mm f/2.8 STM – super-slim, high image quality
The EF 40mm f/2.8 STM is Canon’s first EF pancake lens with a fixed focal length of 40mm and wide f/2.8 aperture, making it ideal for photographers who want a versatile, compact and lightweight lens for portrait, reportage, travel or landscape situations. Precision control over the circular, seven-blade aperture is enabled by the EMD, producing a beautiful bokeh effect and an aspheric lens with Super spectra coatings ensures optimal image quality from the centre of the lens to the periphery for stunning shots of practically any subject.