Canon EOS 7D Product Review

Rabu, 03 Juli 2013 | komentar

Trend Search - Product Review. During the early days of digital SLRs, Canon was pretty much the undisputed leader in CMOS image sensor technology. Almost every new EOS model came with an increase in resolution and high ISO range, and when the EOS 7D appeared in late 2009, the company had progressed from 3MP to 18MP, and ISO 1600 to ISO 12800, in just over nine years. But since then Canon's APS-C cameras have all sported variants on the same basic sensor design, to the extent that you could be forgiven for wondering what on earth their engineers were doing all day. Now we know.






The EOS 70D is a mid-range SLR for enthusiast photographers that from the outside looks like a sensible, indeed desirable upgrade to the EOS 60D. It borrows many of the best bits from Canon's existing SLRs, including the autofocus sensor from the EOS 7D, the fully articulated touchscreen from the EOS 700D (Rebel T5i), and built-in Wi-Fi from the EOS 6D. But on the inside it sports an entirely new sensor that is, potentially, revolutionary. It offers 20.2MP resolution, but uses a 'Dual Pixel CMOS AF' design in which every single pixel is split into two separately-readable photodiodes, facing left and right. This means that in principle they are all capable of phase detection autofocus in live view and movie mode.

In terms of control layout the EOS 70D is a logical evolution of the EOS 60D, adopting many of Canon's intervening updates and improvements. So it offers a full set of external controls to operate most key functions, and Canon's well-designed Quick Control screen to cover pretty much everything else. It also adopts the superb touchscreen interface that debuted on the EOS 650D (Rebel T4i), which we've found to be more useful than you might at first think. The 70D also regains an array of features that disappeared between the EOS 50D and 60D, such as AF microadjustment.
  • 18.0-megapixel CMOS Sensor and Dual DIGIC 4 Image Processors for high image quality and speed with 3 Inch LCD display
  • Kit includes 28-135mm f/3.5-5.6 IS USM standard zoom lens; Accessories- EOS 7D Digital SLR Body; Eyecup EG; Wide Neck strap EW-EOS7D; Stereo AV Cable; USB Interface Cable IFC-200U; Battery Pack LP-E6; Battery Charger LC-E6; EOS Digital Solution Disk; Great Photography is Easy Booklet and "Do more with Micro" Booklet; Software Instruction Manual.
  • Advanced HD movie mode with manual exposure control and selectable frame rates
  • Intelligent Viewfinder with 100 percent field of view; 19-point, all cross-type AF system equipped with dual diagonal cross-type sensors
  • Capture images to CF Card Type I and II, UDMA-compliant CF cards (not included)

Body type
Body type Mid-size SLR
Sensor
Max resolution 5472 x 3648
Other resolutions 3468x2432, 2736x1824, 1920x1280, 720x480, 4864x3648, 3248x2432, 2432x1824, 1696x1280, 640x480,5472x3072, 3468x2048, 2736x1536, 1920x1080, 720x408, 3648x3648, 2432x2432, 1824x1824, 1280x1280, 480x480
Image ratio w:h 1:1, 4:3, 3:2, 16:9
Effective pixels 20.2 megapixels
Sensor photo detectors 20.9 megapixels
Sensor size APS-C (22.5 x 15 mm)
Sensor type CMOS
Processor Digic 5+
Color space sRGB, Adobe RGB
Image
ISO Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (25600 with boost)
White balance presets 6
Custom white balance Yes
Image stabilization No
Uncompressed format RAW
JPEG quality levels Fine, Normal
File format
  • JPEG: Fine, Normal.
  • RAW: RAW, M-RAW, S-RAW (14bit)
Optics & Focus
Autofocus
  • Contrast Detect (sensor)
  • Phase Detect
  • Multi-area
  • Center
  • Selective single-point
  • Tracking
  • Single
  • Continuous
  • Touch
  • Face Detection
  • Live View
Autofocus assist lamp Intermittent firing of built-in flash
Manual focus Yes
Number of focus points 19
Lens mount Canon EF/EF-S mount
Focal length multiplier 1.6×
Screen / viewfinder
Articulated LCD Fully articulated
Screen size 3″
Screen dots 1,040,000
Touch screen Yes
Screen type Clear View II TFT color LCD
Live view Yes
Viewfinder type Optical (pentaprism)
Viewfinder coverage 98 %
Viewfinder magnification 0.95×
Photography features
Minimum shutter speed 30 sec
Maximum shutter speed 1/8000 sec
Scene modes
  • Portrait, Landscape, Close-up, Sports, Night Portrait, Handheld Night Scene, HDR Backlight Control
Built-in flash Yes (Pop-up)
Flash range 12 m
External flash Yes (Built-in flash works as wireless commander)
Flash modes Auto, On, Off, Red-eye
Flash X sync speed 1/250 sec
Drive modes
  • Single, Continuous L, Continuous H, Self timer (2s+remote, 10s +remote), Silent single shooting, Silent continuous shooting
Continuous drive Yes
Self-timer Yes (2 or 10 sec, remote)
Metering modes
  • Multi
  • Center-weighted
  • Spot
  • Partial
Exposure compensation ±5 (at 1/3 EV, 1/2 EV steps)
AE Bracketing ±3 (2, 3, 5, 7 frames at 1/3 EV, 1/2 EV steps)
WB Bracketing Yes (3 frames in either blue/amber or magenta/green axis)
Videography features
Format
  • H.264
Microphone Stereo
Speaker Mono
Resolutions 1920 x 1080 (29.97, 25, 23.976 fps), 1280 x 720 (59.94, 50 fps), 640 x 480 (59.94, 50 fps)
Storage
Storage types SD/SDHC/SDXC
Connectivity
USB USB 2.0 (480 Mbit/sec)
HDMI Yes (HDMI mini)
Wireless Built-In
Remote control Yes (RS-60E3 cable release, RC-6 wireless remote, or using smartphone over Wi-Fi)
Physical
Environmentally sealed Yes (Water and Dust resistant)
Battery Battery Pack
Battery description Lithium-Ion LP-E6 rechargeable battery & charger
Battery Life (CIPA) 920
Weight (inc. batteries) 755 g (1.66 lb / 26.63 oz)
Dimensions 139 x 104 x 79 mm (5.47 x 4.11 x 3.09″)
Other features
Orientation sensor Yes
Timelapse recording Yes (by USB cable and PC)
GPS Optional


Canon's approach of splitting every single pixel on the sensor into two separately readable photosites promises, in theory at least, to overcome the biggest problems that have afflicted on-chip phase detection systems to date. We're certainly excited by what it claims to offer in principle - the ability to work across a large area of the frame, at apertures down to F11, and in low light is a pretty compelling combination. Throw in such goodies as face detection and tracking, and focus point selection by touch, and on paper the EOS 70D looks like it could offer the best live view autofocus of any camera on the market, bar none.

It's become increasingly rare for any manufacturer to show us technology that's genuinely innovative and unique, but that's exactly what Canon has done with the EOS 70D and its 'Dual Pixel CMOS AF' sensor. It's fair to say that on-sensor phase detection AF has so far shown lots of promise without necessarily being truly transformative to the shooting experience of most the cameras that use it, with Nikon's 1 System cameras being the most obvious exception. But while these offer exceptional focusing performance in good light, especially with regards to tracking moving subjects, the AF system can struggle the moment you try shooting indoors with a zoom lens.


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