Olympus C-3000 Zoom vs. Minolta DiMAGE 7i

Comparison

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Olympus C-3000 Zoom

Minolta DiMAGE 7i

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Megapixels

3.10

5.24

Max. image resolution

2048 x 1536

2560 x 1920

Sensor

Sensor type

CCD

Sensor size

1/1.8" (~ 7.11 x 5.33 mm)

2/3" (~ 8.8 x 6.6 mm)

Sensor resolution

2031 x 1527

2640 x 1985

Diagonal

8.89 mm

11.00 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	:	1.53
(ratio)

Olympus C-3000 Zoom		Minolta DiMAGE 7i

Surface area:

37.90 mm²

58.08 mm²

Difference: 20.18 mm² (53%)

DiMAGE 7i sensor is approx. 1.53x bigger than C-3000 Zoom sensor.

Note: You are comparing cameras of different generations. There is a 2 year gap between Olympus C-3000 Zoom (2000) and Minolta DiMAGE 7i (2002). All things being equal, newer sensor generations generally outperform the older.

Pixel pitch

3.5 µm

3.33 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: 0.17 µm (5%)

Pixel pitch of C-3000 Zoom is approx. 5% higher than pixel pitch of DiMAGE 7i.

Pixel area

12.25 µm²

11.09 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: 1.16 µm² (10%)

A pixel on Olympus C-3000 Zoom sensor is approx. 10% bigger than a pixel on Minolta DiMAGE 7i.

Pixel density

8.16 MP/cm²

9 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: 0.84 µm (10%)

Minolta DiMAGE 7i has approx. 10% higher pixel density than Olympus C-3000 Zoom.

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

Specs

Olympus C-3000 Zoom

Minolta DiMAGE 7i

Crop factor

4.87

3.93

Total megapixels

3.30

Effective megapixels

3.10

Optical zoom

7.1x

Digital zoom

Yes

ISO sensitivity

100, 200, 400

Auto, 100, 200, 400, 800

RAW

Manual focus

Normal focus range

80 cm

50 cm

Macro focus range

20 cm

25 cm

Focal length (35mm equiv.)

32 - 96 mm

28 - 200 mm

Aperture priority

Yes

Max. aperture

f2.8 - f2.8

f2.8 - f3.5

Max. aperture (35mm equiv.)

f13.6 - f13.6

f11 - f13.8

Metering

ESP Digital, Spot

Centre weighted, Matrix, Spot

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

16 sec

Bulb+30 sec

Max. shutter speed

1/800 sec

1/4000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

Electronic

White balance presets

Screen size

1.8"

Screen resolution

114,000 dots

122,000 dots

Video capture

Max. video resolution

Storage types

SmartMedia

CompactFlash type I, CompactFlash type II, Microdrive

USB

USB 1.0

HDMI

Wireless

GPS

Battery

AA (4) batteries (NiMH recommended)

AA (2) batteries (NiMH recommended)

Weight

380 g

650 g

Dimensions

110 x 76 x 66 mm

117 x 91 x 113 mm

Year

2000

2002

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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

Olympus C-3000 Zoom diagonal

The diagonal of C-3000 Zoom sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of that value - 8.89 mm. If you want to know why, see sensor sizes.

w = 7.11 mm
h = 5.33 mm

Diagonal = √

7.11² + 5.33²

= 8.89 mm

Minolta DiMAGE 7i diagonal

The diagonal of DiMAGE 7i sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of that value - 11 mm. If you want to know why, see sensor sizes.

w = 8.80 mm
h = 6.60 mm

Diagonal = √

8.80² + 6.60²

= 11.00 mm

Surface area

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

C-3000 Zoom sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 mm²

DiMAGE 7i sensor area

Width = 8.80 mm
Height = 6.60 mm

Surface area = 8.80 × 6.60 = 58.08 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

C-3000 Zoom pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	7.11	× 1000	= 3.5 µm
	2031

DiMAGE 7i pixel pitch

Sensor width = 8.80 mm
Sensor resolution width = 2640 pixels

Pixel pitch =	8.80	× 1000	= 3.33 µm
	2640

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

C-3000 Zoom pixel area

Pixel pitch = 3.5 µm

Pixel area = 3.5² = 12.25 µm²

DiMAGE 7i pixel area

Pixel pitch = 3.33 µm

Pixel area = 3.33² = 11.09 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

C-3000 Zoom pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.711 cm

Pixel density = (2031 / 0.711)² / 1000000 = 8.16 MP/cm²

DiMAGE 7i pixel density

Sensor resolution width = 2640 pixels
Sensor width = 0.88 cm

Pixel density = (2640 / 0.88)² / 1000000 = 9 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

C-3000 Zoom sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 3.10

r = 7.11/5.33 = 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

DiMAGE 7i sensor resolution

Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 5.24

r = 8.80/6.60 = 1.33

X = √	5.24 × 1000000	= 1985
	1.33

Resolution horizontal: X × r = 1985 × 1.33 = 2640
Resolution vertical: X = 1985

Sensor resolution = 2640 x 1985

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

C-3000 Zoom crop factor

Sensor diagonal in mm = 8.89 mm

Crop factor =	43.27	= 4.87
	8.89

DiMAGE 7i crop factor

Sensor diagonal in mm = 11.00 mm

Crop factor =	43.27	= 3.93
	11.00

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).

C-3000 Zoom equivalent aperture

Crop factor = 4.87
Aperture = f2.8 - f2.8

35-mm equivalent aperture = (f2.8 - f2.8) × 4.87 = f13.6 - f13.6

DiMAGE 7i equivalent aperture

Crop factor = 3.93
Aperture = f2.8 - f3.5

35-mm equivalent aperture = (f2.8 - f3.5) × 3.93 = f11 - f13.8

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