The Canon EOS 70D offers a 20.2MP APS-C-sized CMOS sensor; 7-fps bursts, 1920x1080p30 video capture and a 3-inch, 1.04- million-dot LCD touch screen for $1,349 with an EF-S 18–55mm f/3.5–5.6 IS STM lens.
We can't understate how helpful Canon's new Dual Pixel CMOS AF is when shooting moving subjects. LCD Image by Philip Ryan.
Though this first version of Canon’s Dual Pixel CMOS AF doesn’t offer control over the speed of the focusing, this could be a possibility for future versions of this innovative solution to video and live-view AF.
CANON EOS 70D
WHAT'S HOT
New Dual Pixel CMOS AF system
WHAT'S NOT
Image quality nearly same as 60D
WHO IT'S FOR
Advanced shooters looking for an affordable body for stills and video.
New Dual Pixel CMOS AF system
WHAT'S NOT
Image quality nearly same as 60D
WHO IT'S FOR
Advanced shooters looking for an affordable body for stills and video.
Since its inception with the EOS 10D in 2003, Canon’s double-digit-D line of APS-C-format DSLRs for advanced shooters has offered some of the best bang for the buck. Its latest, the EOS 70D ($1,199 street, body only), debuts one of the most innovative approaches to imaging-sensor based autofocus we’ve seen, Dual Pixel CMOS AF.
In addition to this new technology, the 70D boasts bursts of 7 frames per second for up to 65 JPEGs (or 16 RAW images); a 19-point, all-cross-type, conventional phase-detection AF system that works in tandem with the 63-zone metering sensor for predictive focus tracking; and an articulating, 3-inch, 1.04 million-dot LCD. This monitor comes in mighty handy when capturing video, which tops out at 1920x1080p30 footage in Canon’s usual H.264 codec. And the 70D also gets a boost in pixels, to 20.2MP from 18MP in the 60D.
In the Test Lab
Even though the 70D has about two million more pixels than the 60D, their image quality results in our lab testing ended up quite similar. The 70D earned an Excellent resolution rating with 2630 lines per picture height at ISO 100, very close to the 60D’s Excellent 2600 lines. Color accuracy also rated Excellent, this time with an average Delta E of 7.3, versus the 60D’s 6.8. Noise was a bit lower at most ISOs—but at ISO 800, it underperformed just enough to dip to Moderately Low, which limits the 70D’s Excellent overall image quality rating to ISO 400 and below.
As did the 60D, the 70D does a decent job of holding its resolution as sensitivity increases. At ISO 800 it loses very little, turning in 2605 lines. At ISO 6400 it still maintains 2580 lines. From there resolution starts to crumble more rapidly: to 2220 lines at ISO 12,800, then to 2070 at the camera’s top sensitivity of ISO 25,600, a stop more than the 60D offered. To its credit, the 60D maintained 2330 lines at ISO 12,800.
This might boil down to Canon trying to suppress noise in the 70D. After all, it scored 3.6 at ISO 12,800, while the 60D scored 4.7. And except for a tie at ISO 6400, where both cameras hit 3.4, and the 60D advantage at ISO 800, the new camera produced less noise at all of their shared ISOs. We’re talking very small differences here. It’s debatable whether many people would see a real difference between the images these two cameras produce at most ISOs, especially when printed at less than 100-percent magnification.
In autofocus, the 70D proved equal to or marginally faster than the 60D at most of the light levels in our test. Both focus extremely fast, even down to the equivalent of a moonlit field. At the brightest light in our test, the 70D focused in 0.34 sec and not until EV 2 did it top half a second. AF didn’t break a second until the light fell well below of the level at which Canon rates the system to work, EV –0.5. We got consistent enough results to report them below this: At EV –1 it still took less than a second and at EV –2, while less consistent, it averaged 1.21 sec.
In the Field
The EOS 70D stays true to Canon's long-successful design for this camera line. A beefy grip, long enough to fit all your fingers and angled slightly toward your palm on the side nearest the lens, feels very secure when shooting or holding the camera down by your side. Four tiny buttons between the LCD info panel and the command wheel on top provide direct access to AF, drive mode, ISO, and metering. They have such short travel that it can be hard to tell by feel if you’ve pressed one. We liked the raised dot on the ISO button, since we often wanted to change ISO without taking our eye off the optical finder.
In addition to this new technology, the 70D boasts bursts of 7 frames per second for up to 65 JPEGs (or 16 RAW images); a 19-point, all-cross-type, conventional phase-detection AF system that works in tandem with the 63-zone metering sensor for predictive focus tracking; and an articulating, 3-inch, 1.04 million-dot LCD. This monitor comes in mighty handy when capturing video, which tops out at 1920x1080p30 footage in Canon’s usual H.264 codec. And the 70D also gets a boost in pixels, to 20.2MP from 18MP in the 60D.
In the Test Lab
Even though the 70D has about two million more pixels than the 60D, their image quality results in our lab testing ended up quite similar. The 70D earned an Excellent resolution rating with 2630 lines per picture height at ISO 100, very close to the 60D’s Excellent 2600 lines. Color accuracy also rated Excellent, this time with an average Delta E of 7.3, versus the 60D’s 6.8. Noise was a bit lower at most ISOs—but at ISO 800, it underperformed just enough to dip to Moderately Low, which limits the 70D’s Excellent overall image quality rating to ISO 400 and below.
As did the 60D, the 70D does a decent job of holding its resolution as sensitivity increases. At ISO 800 it loses very little, turning in 2605 lines. At ISO 6400 it still maintains 2580 lines. From there resolution starts to crumble more rapidly: to 2220 lines at ISO 12,800, then to 2070 at the camera’s top sensitivity of ISO 25,600, a stop more than the 60D offered. To its credit, the 60D maintained 2330 lines at ISO 12,800.
This might boil down to Canon trying to suppress noise in the 70D. After all, it scored 3.6 at ISO 12,800, while the 60D scored 4.7. And except for a tie at ISO 6400, where both cameras hit 3.4, and the 60D advantage at ISO 800, the new camera produced less noise at all of their shared ISOs. We’re talking very small differences here. It’s debatable whether many people would see a real difference between the images these two cameras produce at most ISOs, especially when printed at less than 100-percent magnification.
In autofocus, the 70D proved equal to or marginally faster than the 60D at most of the light levels in our test. Both focus extremely fast, even down to the equivalent of a moonlit field. At the brightest light in our test, the 70D focused in 0.34 sec and not until EV 2 did it top half a second. AF didn’t break a second until the light fell well below of the level at which Canon rates the system to work, EV –0.5. We got consistent enough results to report them below this: At EV –1 it still took less than a second and at EV –2, while less consistent, it averaged 1.21 sec.
In the Field
The EOS 70D stays true to Canon's long-successful design for this camera line. A beefy grip, long enough to fit all your fingers and angled slightly toward your palm on the side nearest the lens, feels very secure when shooting or holding the camera down by your side. Four tiny buttons between the LCD info panel and the command wheel on top provide direct access to AF, drive mode, ISO, and metering. They have such short travel that it can be hard to tell by feel if you’ve pressed one. We liked the raised dot on the ISO button, since we often wanted to change ISO without taking our eye off the optical finder.
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