Canon EF-S 55-250mm F4-5.6 IS STM Lens Image surfaced over the web, Canon will update its old EF-S 55-250mm lens with improved optics and Step Drive Motor, the New lens expected to be announced with Canon G16 and other Compacts (see here) in next few days.
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DxoMark lab tested a bunch of lenses and sorted out the best available lenses for Canon 700D / T5i DSLR, take a look the list below, Best primes lenses: Sigma 85mm F1.4 EX DG HSM Best zooms: Canon EF 24-70mm f/2.8L II USM
Canon just announced its rumored EF-M 11-22mm Lens, the EF-M 11-22mmm is the first wide angle zoom lens to feature IS, it offers three stops of stabilization for stills and ‘Dynamic IS’ for video, stepper motor (STM) offers silent autofocus during movie shooting, and a retractable barrel design makes the lens more compact. Canon EF-M 11-22mm f/4-5.6 IS STM Lens Major Features
Press ReleaseLondon, UK, 6 June 2013 – Canon today expands its range of EF-M lenses with the introduction of the new EF-M 11-22mm f/4-5.6 IS STM. Designed for Canon’s Compact System Camera, the EOS M, this is Canon’s first ultra wide-angle EF lens to feature an Optical Image Stabilizer. Offering a versatile wide-angle zoom range, first-class optical performance, and a new retractable design, the EF-M 11-22mm f/4-5.6 IS STM is the perfect addition for EOS M users who wish to capture their passion for landscapes and architecture. Shoot the city, shoot the world Designed to expand the range of creative possibilities and shooting subjects, the EF-M 11-22mm f/4-5.6 IS STM has an 11-22mm focal range which provides an incredibly wide field of view. This allows users to capture the environment around them whilst remaining close to the subject – ideal for adding drama and atmosphere to each shot. Class-leading optics deliver incredible results Engineered using the latest optical technologies, the EF-M 11-22mm f/4-5.6 IS STM enables users to capture images with incredible levels of detail and quality. Manufactured using Canon’s professional quality standards, the lens uses Super Spectra Coatings designed to minimise ghosting and flare, providing beautiful results with every shot. Images are crisp and clear thanks to Canon’s Optical Image Stabilizer, which works to keep image blur to a minimum by correcting camera shake. A 3-stop shutter speed advantage ensures high quality stills, even when light levels start to fade. Shooting smooth Full HD movies is easy using the advanced Dynamic IS mode which combats more exaggerated forms of camera shake that occur when shooting video on the move. Canon’s near-silent STM technology also ensures focus noise is supressed during movie capture, so the audience can enjoy crystal clear sound to match the visual quality of the footage captured. Designed for performance and style Incredibly compact and lightweight, the EF-M 11-22mm f/4-5.6 IS STM has been designed to fit easily into the smallest of spaces so it can be carried everywhere. A new retractable lens design – a first for the EF lens range – locked in place by a switch, allows users to retract the lens back into the barrel when not in use. This keeps the body slim and compact, reducing the lens length by 13mm. An integrated full time manual focus ring also provides the freedom to make precise adjustments to focus as needed. Designed to complement the EOS M’s chic styling, the EF-M 11-22mm f/4-5.6 IS STM features a graphite silver, metal exterior, while the knurled focus and zoom rings are comfortable in the hand and provide easy operation. EF-M 11-22mm f/4-5.6 IS STM – key features:
Before using the EF-M 11-22mm f/4-5.6 IS STM with the EOS M it is recommended that users upgrade the camera to firmware version 2.0.0 or later. Canon EF-M 11-22mm Full Specification:
Canon EF-M 11-22mm f/4-5.6 IS STM Lens Sample Images F4-5.6 IS STM 1/50sec. F5.6  F4-5.6 IS STM 4sec. F11 MTF Chart of Canon EF-M 11-22mm f/4-5.6 IS STM Lens
Internal Construction
Take a look at the patent details below, (Translated by google) Description and self-interpretation of the patent literature
See more – Canon Patent News src- egami Canon high speed liquid lens patent surfaced over the web, it is possible that motor from the liquid lens get eliminated since the liquid changes its shape when desired voltage is applied, take a look at more details below
Description and self-interpretation of the patent literature
See more Canon Patents src-egami Canon two new lens patent surfaced over the web, APS-C 18-200mm, Full-Frame 28-200mm Lens Patent surfaced over the web, take a look at the details below.
Description and self-interpretation of the patent literature
src-egami More patent news coming from Canon side, A bunch of new DO (Diffractive Optics) patent surfaced over the web – 500mm f/4, 500mm f/5.6, 600mm f/4, 800mm f/5.6, more details translated by google below Description and self-interpretation of the patent literature
About DO Lenses A single diffractive optical (DO) element features diffractive gratings – very fine parallel grooves on the surface – which change the direction of light. However, this process generates diffracted light that is not suitable for photographic lenses and can cause flaring. Employing multiple DO elements ensures that nearly all light allowed to pass through the DO elements can be used for photography. Canon DO lenses use multiple DO elements whose diffractive gratings are bonded face-to-face. Combining this arrangement with a refractive convex lens almost completely cancels out chromatic aberration while allowing the lens elements to be placed much closer together within the lens barrel. The result is a high performance EF lens that’s significantly shorter and lighter than typical refractive lenses. In fact, the EF 400mm f/4 DO IS USM is 27% smaller and 31% lighter than a conventional 400mm f/4 lens would be. Fast becoming a favourite with sports and news photographers, DO lenses are making high performance telephoto shooting easier and more manageable than ever before. |
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