Canon EOS Rebel T3i / 600D

Specifications

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EOS Rebel T3i / 600D image
Brand: Canon
Model: EOS Rebel T3i / 600D
MegaPixels: 18.00
Sensor: 22.3 x 14.9 mm
Price: Amazon, B&H Photo, Adorama

Sensor INFO

Canon EOS Rebel T3i / 600D comes with a 22.3 x 14.9 mm CMOS sensor, which has a diagonal of 26.82 mm (1.06 inch) and a surface area of 332.27 mm².
Diagonal
26.82 mm
Surface area
332.3 mm²
Pixel pitch
4.29 µm
Pixel area
18.4 µm²
Pixel density
5.43 MP/cm²
If you want to know about the accuracy of these numbers, click here.
Actual sensor size:
This is the actual sensor size of Canon EOS Rebel T3i / 600D.
(Note: on some systems the presentation might not be 100% accurate. If in doubt, take a ruler and measure it. It should be 22.30 x 14.90 mm)
The sensor has a surface area of 332.3 mm². There are approx. 18,000,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 4.29 µm. Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next.

Pixel or photosite area is 18.4 µm². The larger the photosite, the more light it can capture and the more information can be recorded.

Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Canon EOS Rebel T3i / 600D has a pixel density of 5.43 MP/cm².

These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how Canon EOS Rebel T3i / 600D compares to other digital cameras, click here.

Specifications

Brand
Canon (Canon cameras)
Model
EOS Rebel T3i / 600D
Effective megapixels
18.00
Total megapixels
18.70
Sensor size
22.3 x 14.9 mm
Sensor type
CMOS
Sensor resolution
5196 x 3464 
Max. resolution
5184 x 3456
Min. resolution
480 x 480
Crop factor
1.61 
Optical zoom
n/a
Digital zoom
Yes
ISO
Auto, 100, 200, 400, 800, 1600, 3200, 6400, (12800 with boost)
Auto focus
Yes
Manual focus
Yes
Normal focus range
n/a
Macro focus range
n/a
Focal length (35mm equiv.)
n/a
Aperture priority
Yes
Aperture
n/a
Aperture (35mm equiv.)
n/a 
Metering
Multi, Center-weighted, Spot, Partial
Exposure Compensation
-5EV - +5EV with 1/3 or 1/2 step
Shutter priority
Yes
Min. shutter speed
30 sec
Max. shutter speed
1/4000 sec
Flash modes
Anti red-eye, Auto, Fill in, Off, Slow flash
Built-in flash
Yes
External flash
Yes
Viewfinder
Optical
White balance presets
6
LCD display
Yes
LCD size
3"
LCD resolution
1,040,000
Selftimer
Yes
Storage types
SDHC, SDXC, Secure Digital
USB
USB 2.0 Hi-Speed
Batteries
Li-Ion
Weight
570 g
Dimensions
133.1 x 99.5 x 79.7 mm
Year
2011


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Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height


Canon EOS Rebel T3i / 600D diagonal

w = 22.30 mm
h = 14.90 mm
Diagonal =  22.30² + 14.90²   = 26.82 mm


Surface area

Surface area is calculated by multiplying the width and the height of a sensor.

Width = 22.30 mm
Height = 14.90 mm

Surface area = 22.30 × 14.90 = 332.27 mm²


Pixel pitch

Pixel pitch is the distance from the center of one pixel to the center of the next measured in micrometers (µm). It can be calculated with the following formula:
Pixel pitch =   sensor width in mm  × 1000
sensor resolution width in pixels

Canon EOS Rebel T3i / 600D pixel pitch

Sensor width = 22.30 mm
Sensor resolution width = 5196 pixels
Pixel pitch =   22.30  × 1000  = 4.29 µm
5196


Pixel area

The area of one pixel can be calculated by simply squaring the pixel pitch:
Pixel area = pixel pitch²

You could also divide sensor surface area with effective megapixels:
Pixel area =   sensor surface area in mm²
effective megapixels

Canon EOS Rebel T3i / 600D pixel area

Pixel pitch = 4.29 µm

Pixel area = 4.29² = 18.4 µm²


Pixel density

Pixel density can be calculated with the following formula:
Pixel density =  ( sensor resolution width in pixels )² / 1000000
sensor width in cm

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Canon EOS Rebel T3i / 600D pixel density

Sensor resolution width = 5196 pixels
Sensor width = 2.23 cm

Pixel density = (5196 / 2.23)² / 1000000 = 5.43 MP/cm²


Sensor resolution

Sensor resolution is calculated from sensor size and effective megapixels. It's slightly higher than maximum (not interpolated) image resolution which is usually stated on camera specifications. Sensor resolution is used in pixel pitch, pixel area, and pixel density formula. For sake of simplicity, we're going to calculate it in 3 stages.

1. First we need to find the ratio between horizontal and vertical length by dividing the former with the latter (aspect ratio). It's usually 1.33 (4:3) or 1.5 (3:2), but not always. 22.8 × 15.5 sensor for example has a ratio of 1.47.

2. With the ratio (r) known we can calculate the X from the formula below, where X is a vertical number of pixels:
(X × r) × X = effective megapixels × 1000000    →   
X =  effective megapixels × 1000000
r
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

Canon EOS Rebel T3i / 600D sensor resolution

Sensor width = 22.30 mm
Sensor height = 14.90 mm
Effective megapixels = 18.00
r = 22.30/14.90 = 1.5
X =  18.00 × 1000000  = 3464
1.5
Resolution horizontal: X × r = 3464 × 1.5 = 5196
Resolution vertical: X = 3464

Sensor resolution = 5196 x 3464


Crop factor

Crop factor or focal length multiplier is calculated by dividing the diagonal of 35 mm film (43.27 mm) with the diagonal of the sensor.
Crop factor =   43.27 mm
sensor diagonal in mm


Canon EOS Rebel T3i / 600D crop factor

Sensor diagonal in mm = 26.82 mm
Crop factor =   43.27  = 1.61
26.82

35 mm equivalent aperture

Equivalent aperture (in 135 film terms) is calculated by multiplying lens aperture with crop factor (a.k.a. focal length multiplier).

Canon EOS Rebel T3i / 600D equivalent aperture

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Canon EOS Rebel T3i / 600D, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon EOS Rebel T3i / 600D is 1.61


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