Canon EOS Rebel SL1 vs. Canon EOS Rebel T2i

Comparison

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EOS Rebel SL1 image
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EOS Rebel T2i image
Canon EOS Rebel SL1 Canon EOS Rebel T2i
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Megapixels
18.00
18.00
Max. image resolution
5184 x 3456
5184 x 3456

Sensor

Sensor type
CMOS
CMOS
Sensor size
22.3 x 14.9 mm
22.3 x 14.9 mm
Sensor resolution
5196 x 3464
5196 x 3464
Diagonal
26.82 mm
26.82 mm
Sensor size comparison
Sensor size is generally a good indicator of the quality of the camera. Sensors can vary greatly in size. As a general rule, the bigger the sensor, the better the image quality.

Bigger sensors are more effective because they have more surface area to capture light. An important factor when comparing digital cameras is also camera generation. Generally, newer sensors will outperform the older.

Learn more about sensor sizes »

Actual sensor size

Note: Actual size is set to screen → change »
vs
1 : 1
(ratio)
Canon EOS Rebel SL1 Canon EOS Rebel T2i
Surface area:
332.27 mm² vs 332.27 mm²
Difference: 0 mm² (0%)
Rebel SL1 and Rebel T2i sensors are the same size.
Note: You are comparing cameras of different generations. There is a 3 year gap between Canon Rebel SL1 (2013) and Canon Rebel T2i (2010). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
4.29 µm
4.29 µm
Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next. It tells you how close the pixels are to each other.

The bigger the pixel pitch, the further apart they are and the bigger each pixel is. Bigger pixels tend to have better signal to noise ratio and greater dynamic range.
Difference: 0 µm (0%)
Rebel SL1 and Rebel T2i have the same pixel pitch.
Pixel area
18.4 µm²
18.4 µm²
Pixel or photosite area affects how much light per pixel can be gathered. The larger it is the more light can be collected by a single pixel.

Larger pixels have the potential to collect more photons, resulting in greater dynamic range, while smaller pixels provide higher resolutions (more detail) for a given sensor size.
Relative pixel sizes:
vs
Pixel area difference: 0 µm² (0%)
Canon Rebel SL1 and Canon Rebel T2i have the same pixel area.
Pixel density
5.43 MP/cm²
5.43 MP/cm²
Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor.

Higher pixel density means smaller pixels and lower pixel density means larger pixels.
Difference: 0 µm (0%)
Canon Rebel SL1 and Canon Rebel T2i have the same pixel density.
To learn about the accuracy of these numbers, click here.

Specs

Canon Rebel SL1
Canon Rebel T2i
Crop factor
1.61
1.61
Total megapixels
18.50
18.70
Effective megapixels
18.00
18.00
Optical zoom
Digital zoom
No
No
ISO sensitivity
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (25600 with boost)
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (with boost)
RAW
Manual focus
Normal focus range
Macro focus range
Focal length (35mm equiv.)
Aperture priority
Yes
Yes
Max. aperture
Max. aperture (35mm equiv.)
n/a
n/a
Metering
Multi, Center-weighted, Spot, Partial
63-zone Evaluative, Centre weighted, Evaluative, Spot
Exposure compensation
±5 EV (in 1/3 EV, 1/2 EV steps)
±5 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
30 sec
Max. shutter speed
1/4000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical (pentamirror)
Optical
White balance presets
6
6
Screen size
3"
3"
Screen resolution
1,040,000 dots
1,040,000 dots
Video capture
Max. video resolution
1920x1080 (30p/25p/24p)
1920x1080 (30p/25p/24p)
Storage types
SD/SDHC/SDXC
SDHC, SDXC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion LP-E12 rechargeable battery
Li-Ion
Weight
407 g
530 g
Dimensions
116.8 x 90.7 x 69.4 mm
128.8 x 97.5 x 75.3 mm
Year
2013
2010



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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 Rebel SL1 diagonal

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

Canon Rebel T2i 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.

Rebel SL1 sensor area

Width = 22.30 mm
Height = 14.90 mm

Surface area = 22.30 × 14.90 = 332.27 mm²

Rebel T2i sensor area

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

Rebel SL1 pixel pitch

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

Rebel T2i 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

Rebel SL1 pixel area

Pixel pitch = 4.29 µm

Pixel area = 4.29² = 18.4 µm²

Rebel T2i 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

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

Rebel SL1 pixel density

Sensor resolution width = 5196 pixels
Sensor width = 2.23 cm

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

Rebel T2i 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.

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

Rebel SL1 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

Rebel T2i 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


Rebel SL1 crop factor

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

Rebel T2i 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).

Rebel SL1 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 Rebel SL1, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon Rebel SL1 is 1.61

Rebel T2i 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 Rebel T2i, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon Rebel T2i is 1.61

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