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canon 550D vs Sony A55 Video AF Comparison
Professionals Should Know Canon EOS-1D Mark IV
Offering a comprehensive combination of speed, accuracy and image quality, the EOS-1D Mark IV is the perfect choice for professional photographers and moving subjects. With a absolutely redesigned 45-point AF arrangement including 39 cross-type points, a new AI Servo II AF focus tracking arrangement with bigger algorithm accumulated with 10 fps connected shooting, the EOS-1D Mark IV can handle even high speed situations with ease. An APS-H sized 16.1-megapixel CMOS sensor, Dual DIGIC 4 angel processors, a amazing ISO ambit of 100-12800 (up to 102400 in H3 mode) with an avant-garde babble abridgement arrangement helps ensure sharp, low-noise images in alike low-light situations. Add avant-garde Live View shooting, Full HD cine recording with selectable anatomy ante and chiral acknowledgment ascendancy additional a host of new appearance that enhance every angle of the cutting process. The Canon 1D Mark IV is the choice of professionals who want the ultimate performance SLR.
The Canon EOS 1D Mark IV features a absolutely new 45-point AF system, with 39 f/2.8 acute cross-type credibility amid beyond the frame, accouterment constant AF on changeless or affective subjects, no amount which AF point is actuality used. All 45 AF points are user selectable and now more sensitive, with the AF points towards the edge of the frame offering identical levels of performance to those in the centre.
The absolute AF arrangement is managed by a committed microprocessor, accouterment fast, authentic focusing – even when shooting continuously at 10fps. Canon’s newly-evolved AI Servo II AF offers added attention back tracking affective objects, utilising the ability provided by the committed chip to advance all-embracing tracking accurateness and accretion focus believability in low-contrast and acutely ablaze conditions.
The Canon EOS-1D Mark IV also features orientation-linked AF points, an orientation sensor controlled feature that enables photographers to store separate AF points for different camera positions. Firing positions covering both horizontal and vertical (both grip and hold down), related guidance AF points offers the flexibility to quickly change the orientation of the camera to shoot with the AF switch setting to match the field. AF point registration enables the photographer to store an alternate AF point that can be used at the touch of a button.
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