Nikon Coolpix L820 vs. Canon EOS Rebel T2i

Comparison

change cameras »
Coolpix L820 image
vs
EOS Rebel T2i image
Nikon Coolpix L820 Canon EOS Rebel T2i
check price » check price »
Megapixels
16.00
18.00
Max. image resolution
4608 x 3456
5184 x 3456

Sensor

Sensor type
CMOS
CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
22.3 x 14.9 mm
Sensor resolution
4612 x 3468
5196 x 3464
Diagonal
7.70 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 : 11.67
(ratio)
Nikon Coolpix L820 Canon EOS Rebel T2i
Surface area:
28.46 mm² vs 332.27 mm²
Difference: 303.81 mm² (1067%)
Rebel T2i sensor is approx. 11.67x bigger than L820 sensor.
Note: You are comparing cameras of different generations. There is a 3 year gap between Nikon L820 (2013) and Canon Rebel T2i (2010). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.34 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: 2.95 µm (220%)
Pixel pitch of Rebel T2i is approx. 220% higher than pixel pitch of L820.
Pixel area
1.8 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: 16.6 µm² (922%)
A pixel on Canon Rebel T2i sensor is approx. 922% bigger than a pixel on Nikon L820.
Pixel density
56.06 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: 50.63 µm (932%)
Nikon L820 has approx. 932% higher pixel density than Canon Rebel T2i.
To learn about the accuracy of these numbers, click here.

Specs

Nikon L820
Canon Rebel T2i
Crop factor
5.62
1.61
Total megapixels
16.79
18.70
Effective megapixels
16.00
18.00
Optical zoom
30x
Digital zoom
Yes
No
ISO sensitivity
Auto, 125, 200, 400, 800, 1600, 3200
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (with boost)
RAW
Manual focus
Normal focus range
50 cm
Macro focus range
1 cm
Focal length (35mm equiv.)
22.5 - 675 mm
Aperture priority
No
Yes
Max. aperture
f3 - f5.8
Max. aperture (35mm equiv.)
f16.9 - f32.6
n/a
Metering
Matrix, Center-weighted, Spot
63-zone Evaluative, Centre weighted, Evaluative, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±5 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
No
Yes
Min. shutter speed
4 sec
30 sec
Max. shutter speed
1/4000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
None
Optical
White balance presets
6
6
Screen size
3"
3"
Screen resolution
921,000 dots
1,040,000 dots
Video capture
Max. video resolution
1920x1080 (30p)
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
4 x AA Alkaline, NiMH, or Lithium batteries
Li-Ion
Weight
470 g
530 g
Dimensions
111.0 x 76.3 x 84.5 mm
128.8 x 97.5 x 75.3 mm
Year
2013
2010



Choose cameras to compare

vs

Diagonal

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

Nikon L820 diagonal

The diagonal of L820 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm
Diagonal =  6.16² + 4.62²   = 7.70 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.

L820 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 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

L820 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4612 pixels
Pixel pitch =   6.16  × 1000  = 1.34 µm
4612

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

L820 pixel area

Pixel pitch = 1.34 µm

Pixel area = 1.34² = 1.8 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

L820 pixel density

Sensor resolution width = 4612 pixels
Sensor width = 0.616 cm

Pixel density = (4612 / 0.616)² / 1000000 = 56.06 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

L820 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.00
r = 6.16/4.62 = 1.33
X =  16.00 × 1000000  = 3468
1.33
Resolution horizontal: X × r = 3468 × 1.33 = 4612
Resolution vertical: X = 3468

Sensor resolution = 4612 x 3468

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


L820 crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

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).

L820 equivalent aperture

Crop factor = 5.62
Aperture = f3 - f5.8

35-mm equivalent aperture = (f3 - f5.8) × 5.62 = f16.9 - f32.6

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

Enter your screen size (diagonal)

My screen size is  inches



Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.