canyon has always been one gradation forward of the pack when it comes to put video in DSLRs . From the pro 5D to the beginner Rebel T ’s , it ’s been a loss leader . But the newfangled tech in the Canon EOS 70D could alter thing forever once again .
The Canon EOS 70D expend a new 20.2 - megapixel APS - C sensor . That spec might not sound all the noteworthy from the offset , but the detector ’s architecture is completely new , which allow the tv camera to achieve the fastest and most exact continuous autofocus while recording video . For many hired gun , this is the holy Sangraal . The killer feature they ’ve been waiting for .
Let ’s back up . On the submission - tier T4i last year , Canon started using a intercrossed autofocus organization that used a combination contrast and phase espial autofocus system so that the television camera could pore continuously while recording telecasting .
When record television , DSLRs utilise sensor - base autofocus , rather than the optical autofocus sensors that you use when you ’re simply shooting photos using through viewfinder . Initially , sensor - base organisation were just too slow to sour continuously because they only used direct contrast ratio to determine focus . By sacrificing a duo of photodiodes on the sensor to phase detection , the young intercrossed system was able to do the oeuvre of finding focusing tight enough that it was reasonable to call it effectual .
Or that was the hypothesis anyway . We tested the organisation a couple fo different times on boththe T4iand themirrorless Canon EOS M , and we were n’t blown away . It work — yes — but it was still too tiresome to be reliable .
Canon T4i Review : The Best Budget DSLR Is Kind of a Bummer
Now this year , the 70D introduces a new phase - spotting only system Canon call Dual Pixel CMOS AF . That sounds fancy , and actually , the tech behind it reflects a genuine forward motion in technology rather than just a selling gimmick . The fresh CMOS detector ’s 20.2 - megapixel resoluteness has been divided into 40.1 million - photodiode architecture so that you ’ve fundamentally got two diodes capturing luminousness for each picture element .
Why ? Because now there is a phase detection diode at every point on the sensor . Instead of just a few disperse about , you ’ve got a sensor evenly pelt with phase detection points . ( The two diodes at each pixel point synthesize , so you ’re not losing light sensitivity — at least , that ’s what Canon severalise us . )
In practice , this novel AF organisation is moderately singular — at least as far as we can tell . We assay out a near - production version of the 70D at a briefing in New York , and the pep pill and preciseness of the autofocus during video was hard to believe . This video was made by Canon so it should be taken with a little bit of skepticism , but our abbreviated experience with the 70D would seem to verify that some of this awesome is actually possible .
One of the nice thing about the tech is that it gets disembarrass of the one-time “ focus Holman Hunt ” that inch nearer and close to focus . or else , the 70D ’s focus algorithms smoothly slew into plaza so you miss the jarring back - and - forth jumps you ’ve noticed before .
The Canon EOS 70D swoops in above the Canon 60D in the melodic phrase , although the 60D is n’t locomote anywhere just yet . Similarly , Canon wanted us to be clean that it ’s not exactly a replacement for the 7D either .
The 70D offers a few improvements over its precursor , include new articulating , three - inch capacitive touchscreen , and quicker seven frame - per - 2d continuous shooting .
Amongst the drawbacks of the camera are that it does n’t have a earpiece mariner for supervise the audio that you ’re record through the mic jack or built - in mike , which is sad , view the military strength of the photographic camera ’s picture features .
The tv camera will be available in September for $ 1200 ( eubstance alone ) , $ 1350 ( w/18 - 55 mm outfit lens ) , and $ 1550 ( w/18 - 135 mm kit electron lens ) .
exposure by Michael Hession
CamerasCanonDSLRsHD TV
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