Olympus Stylus 850 SW vs. Nikon D70
Comparison
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Olympus Stylus 850 SW | Nikon D70 | ||||
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Megapixels
8.00
6.10
Max. image resolution
3248 x 2436
3008 x 2000
Sensor
Sensor type
CCD
CCD
Sensor size
1/2.35" (~ 6.03 x 4.52 mm)
23.7 x 15.6 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 »
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 »
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1 | : | 13.56 |
(ratio) | ||
Olympus Stylus 850 SW | Nikon D70 |
Surface area:
27.26 mm² | vs | 369.72 mm² |
Difference: 342.46 mm² (1256%)
D70 sensor is approx. 13.56x bigger than 850 SW sensor.
Note: You are comparing cameras of different generations.
There is a 4 year gap between Olympus 850 SW (2008) and Nikon D70 (2004).
All things being equal, newer sensor generations generally outperform the older.
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.
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.
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.
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: 57.11 µm² (1670%)
A pixel on Nikon D70 sensor is approx. 1670% bigger than a pixel on Olympus 850 SW.
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.
Higher pixel density means smaller pixels and lower pixel density means larger pixels.
To learn about the accuracy of these numbers,
click here.
Specs
Olympus 850 SW
Nikon D70
Total megapixels
8.50
6.30
Effective megapixels
8.00
6.10
Optical zoom
3x
Digital zoom
Yes
No
ISO sensitivity
Auto, (80 - 1600), 80, 100, 200, 400, 800, 1600
Auto, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
50 cm
Macro focus range
7 cm
Focal length (35mm equiv.)
38 - 114 mm
Aperture priority
No
Yes
Max. aperture
f3.5 - f5.0
Metering
Multi, Center-weighted, Spot
3D Matrix, Centre weighted, 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
1 sec
30 sec
Max. shutter speed
1/1000 sec
1/8000 sec
Built-in flash
External flash
Viewfinder
None
Optical (pentamirror)
White balance presets
6
4
Screen size
2.5"
1.8"
Screen resolution
230,000 dots
130,000 dots
Video capture
Max. video resolution
Storage types
xD Picture Card, Internal
CompactFlash type I, CompactFlash type II
USB
USB 2.0 (480 Mbit/sec)
USB 1.0
HDMI
Wireless
GPS
Battery
Lithium-Ion (LI-42B)
Nikon EN-EL3 Lithium-Ion included
Weight
176 g
679 g
Dimensions
94 x 61 x 21 mm
140 x 111 x 78 mm
Year
2008
2004
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Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
Diagonal = √ | w² + h² |
Olympus 850 SW diagonal
The diagonal of 850 SW sensor is not 1/2.35 or 0.43" (10.8 mm) as you might expect, but approximately two thirds of
that value - 7.54 mm. If you want to know why, see
sensor sizes.
w = 6.03 mm
h = 4.52 mm
w = 6.03 mm
h = 4.52 mm
Diagonal = √ | 6.03² + 4.52² | = 7.54 mm |
Nikon D70 diagonal
w = 23.70 mm
h = 15.60 mm
h = 15.60 mm
Diagonal = √ | 23.70² + 15.60² | = 28.37 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
850 SW sensor area
Width = 6.03 mm
Height = 4.52 mm
Surface area = 6.03 × 4.52 = 27.26 mm²
Height = 4.52 mm
Surface area = 6.03 × 4.52 = 27.26 mm²
D70 sensor area
Width = 23.70 mm
Height = 15.60 mm
Surface area = 23.70 × 15.60 = 369.72 mm²
Height = 15.60 mm
Surface area = 23.70 × 15.60 = 369.72 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 |
850 SW pixel pitch
Sensor width = 6.03 mm
Sensor resolution width = 3262 pixels
Sensor resolution width = 3262 pixels
Pixel pitch = | 6.03 | × 1000 | = 1.85 µm |
3262 |
D70 pixel pitch
Sensor width = 23.70 mm
Sensor resolution width = 3045 pixels
Sensor resolution width = 3045 pixels
Pixel pitch = | 23.70 | × 1000 | = 7.78 µm |
3045 |
Pixel area
The area of one pixel can be calculated by simply squaring the pixel pitch:
You could also divide sensor surface area with effective megapixels:
Pixel area = pixel pitch²
You could also divide sensor surface area with effective megapixels:
Pixel area = | sensor surface area in mm² |
effective megapixels |
850 SW pixel area
Pixel pitch = 1.85 µm
Pixel area = 1.85² = 3.42 µm²
Pixel area = 1.85² = 3.42 µm²
D70 pixel area
Pixel pitch = 7.78 µm
Pixel area = 7.78² = 60.53 µm²
Pixel area = 7.78² = 60.53 µm²
Pixel density
Pixel density can be calculated with the following formula:
One could also use this 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 |
850 SW pixel density
Sensor resolution width = 3262 pixels
Sensor width = 0.603 cm
Pixel density = (3262 / 0.603)² / 1000000 = 29.26 MP/cm²
Sensor width = 0.603 cm
Pixel density = (3262 / 0.603)² / 1000000 = 29.26 MP/cm²
D70 pixel density
Sensor resolution width = 3045 pixels
Sensor width = 2.37 cm
Pixel density = (3045 / 2.37)² / 1000000 = 1.65 MP/cm²
Sensor width = 2.37 cm
Pixel density = (3045 / 2.37)² / 1000000 = 1.65 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:
3. To get sensor resolution we then multiply X with the corresponding ratio:
Resolution horizontal: X × r
Resolution vertical: X
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 → |
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Resolution horizontal: X × r
Resolution vertical: X
850 SW sensor resolution
Sensor width = 6.03 mm
Sensor height = 4.52 mm
Effective megapixels = 8.00
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453
Sensor resolution = 3262 x 2453
Sensor height = 4.52 mm
Effective megapixels = 8.00
r = 6.03/4.52 = 1.33 |
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Resolution vertical: X = 2453
Sensor resolution = 3262 x 2453
D70 sensor resolution
Sensor width = 23.70 mm
Sensor height = 15.60 mm
Effective megapixels = 6.10
Resolution horizontal: X × r = 2003 × 1.52 = 3045
Resolution vertical: X = 2003
Sensor resolution = 3045 x 2003
Sensor height = 15.60 mm
Effective megapixels = 6.10
r = 23.70/15.60 = 1.52 |
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Resolution vertical: X = 2003
Sensor resolution = 3045 x 2003
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 |
850 SW crop factor
Sensor diagonal in mm = 7.54 mm
Crop factor = | 43.27 | = 5.74 |
7.54 |
D70 crop factor
Sensor diagonal in mm = 28.37 mm
Crop factor = | 43.27 | = 1.53 |
28.37 |
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).
850 SW equivalent aperture
Crop factor = 5.74
Aperture = f3.5 - f5.0
35-mm equivalent aperture = (f3.5 - f5.0) × 5.74 = f20.1 - f28.7
Aperture = f3.5 - f5.0
35-mm equivalent aperture = (f3.5 - f5.0) × 5.74 = f20.1 - f28.7
D70 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
Nikon D70, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Nikon D70 is 1.53
Crop factor for Nikon D70 is 1.53
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