Nikon Coolpix 775 vs. Nikon Coolpix 3200

Comparison

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Nikon Coolpix 775

Nikon Coolpix 3200

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Megapixels

1.90

3.10

Max. image resolution

1600 x 1200

2048 x 1536

Sensor

Sensor type

CCD

Sensor size

1/2.7" (~ 5.33 x 4 mm)

Sensor resolution

1589 x 1195

2031 x 1527

Diagonal

6.66 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)

Nikon Coolpix 775		Nikon Coolpix 3200

Surface area:

21.32 mm²

Difference: 0 mm² (0%)

775 and 3200 sensors are the same size.

Note: You are comparing cameras of different generations. There is a 3 year gap between Nikon 775 (2001) and Nikon 3200 (2004). All things being equal, newer sensor generations generally outperform the older.

Pixel pitch

3.35 µm

2.62 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: 0.73 µm (28%)

Pixel pitch of 775 is approx. 28% higher than pixel pitch of 3200.

Pixel area

11.22 µm²

6.86 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:

Pixel area difference: 4.36 µm² (64%)

A pixel on Nikon 775 sensor is approx. 64% bigger than a pixel on Nikon 3200.

Pixel density

8.89 MP/cm²

14.52 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: 5.63 µm (63%)

Nikon 3200 has approx. 63% higher pixel density than Nikon 775.

To learn about the accuracy of these numbers, click here.

Specs

Nikon 775

Nikon 3200

Crop factor

6.5

Total megapixels

2.10

3.30

Effective megapixels

1.90

3.10

Optical zoom

Digital zoom

Yes

ISO sensitivity

Auto, (100)

Auto, (50-200)

RAW

Manual focus

Normal focus range

30 cm

Macro focus range

4 cm

Focal length (35mm equiv.)

38 - 115 mm

Aperture priority

Max. aperture

f2.8 - f4.9

Max. aperture (35mm equiv.)

f18.2 - f31.9

Metering

Multi, Center-weighted, Spot

256-segment Matrix

Exposure compensation

±2 EV (in 1/3 EV steps)

±2 EV (in 1/2 EV steps)

Shutter priority

Min. shutter speed

1 sec

4 sec

Max. shutter speed

1/1000 sec

1/3000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

White balance presets

Screen size

1.5"

1.6"

Screen resolution

110,000 dots

80,000 dots

Video capture

Max. video resolution

Storage types

Compact Flash (Type I only)

Secure Digital

USB

USB 1.0

HDMI

Wireless

GPS

Battery

Nikon EN-EL1 Lithium-Ion included

AA (2) batteries (NiMH recommended)

Weight

230 g

140 g

Dimensions

87 x 67 x 44 mm

88 x 65 x 38 mm

Year

2001

2004

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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

Nikon 775 diagonal

The diagonal of 775 sensor is not 1/2.7 or 0.37" (9.4 mm) as you might expect, but approximately two thirds of that value - 6.66 mm. If you want to know why, see sensor sizes.

w = 5.33 mm
h = 4.00 mm

Diagonal = √

5.33² + 4.00²

= 6.66 mm

Nikon 3200 diagonal

The diagonal of 3200 sensor is not 1/2.7 or 0.37" (9.4 mm) as you might expect, but approximately two thirds of that value - 6.66 mm. If you want to know why, see sensor sizes.

w = 5.33 mm
h = 4.00 mm

Diagonal = √

5.33² + 4.00²

= 6.66 mm

Surface area

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

775 sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

3200 sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 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

775 pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 1589 pixels

Pixel pitch =	5.33	× 1000	= 3.35 µm
	1589

3200 pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	5.33	× 1000	= 2.62 µm
	2031

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

775 pixel area

Pixel pitch = 3.35 µm

Pixel area = 3.35² = 11.22 µm²

3200 pixel area

Pixel pitch = 2.62 µm

Pixel area = 2.62² = 6.86 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

775 pixel density

Sensor resolution width = 1589 pixels
Sensor width = 0.533 cm

Pixel density = (1589 / 0.533)² / 1000000 = 8.89 MP/cm²

3200 pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.533 cm

Pixel density = (2031 / 0.533)² / 1000000 = 14.52 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

775 sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 1.90

r = 5.33/4.00 = 1.33

X = √	1.90 × 1000000	= 1195
	1.33

Resolution horizontal: X × r = 1195 × 1.33 = 1589
Resolution vertical: X = 1195

Sensor resolution = 1589 x 1195

3200 sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.10

r = 5.33/4.00 = 1.33

X = √	3.10 × 1000000	= 1527
	1.33

Resolution horizontal: X × r = 1527 × 1.33 = 2031
Resolution vertical: X = 1527

Sensor resolution = 2031 x 1527

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

775 crop factor

Sensor diagonal in mm = 6.66 mm

Crop factor =	43.27	= 6.5
	6.66

3200 crop factor

Sensor diagonal in mm = 6.66 mm

Crop factor =	43.27	= 6.5
	6.66

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).

775 equivalent aperture

Crop factor = 6.5
Aperture = f2.8 - f4.9

35-mm equivalent aperture = (f2.8 - f4.9) × 6.5 = f18.2 - f31.9

3200 equivalent aperture

Crop factor = 6.5
Aperture = f2.8 - f4.9

35-mm equivalent aperture = (f2.8 - f4.9) × 6.5 = f18.2 - f31.9

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