Fujifilm DS-260HD vs. Pentax K20D

Comparison

change cameras »
DS-260HD image
vs
K20D image
Fujifilm DS-260HD Pentax K20D
check price » check price »
Megapixels
1.30
14.60
Max. image resolution
1280 x 1024
4672 x 3120

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2" (~ 6.4 x 4.8 mm)
23.4 x 15.6 mm
Sensor resolution
1315 x 989
4680 x 3120
Diagonal
8.00 mm
28.12 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 : 11.88
(ratio)
Fujifilm DS-260HD Pentax K20D
Surface area:
30.72 mm² vs 365.04 mm²
Difference: 334.32 mm² (1088%)
K20D sensor is approx. 11.88x bigger than DS-260HD sensor.
Note: You are comparing sensors of very different generations. There is a gap of 9 years between Fujifilm DS-260HD (1999) and Pentax K20D (2008). Nine years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.
Pixel pitch
4.87 µm
5 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: 0.13 µm (3%)
Pixel pitch of K20D is approx. 3% higher than pixel pitch of DS-260HD.
Pixel area
23.72 µm²
25 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: 1.28 µm² (5%)
A pixel on Pentax K20D sensor is approx. 5% bigger than a pixel on Fujifilm DS-260HD.
Pixel density
4.22 MP/cm²
4 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: 0.22 µm (5%)
Fujifilm DS-260HD has approx. 5% higher pixel density than Pentax K20D.
To learn about the accuracy of these numbers, click here.



Specs

Fujifilm DS-260HD
Pentax K20D
Crop factor
5.41
1.54
Total megapixels
1.50
15.10
Effective megapixels
1.30
14.60
Optical zoom
3x
Digital zoom
No
No
ISO sensitivity
100
Auto, 100 - 6400
RAW
Manual focus
Normal focus range
90 cm
Macro focus range
25 cm
Focal length (35mm equiv.)
35 - 105 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f4.5
Max. aperture (35mm equiv.)
f15.1 - f24.3
n/a
Metering
Multi, Average, Spot
Centre weighted, Multi-segment, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
1/4 sec
30 sec
Max. shutter speed
1/1000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (pentaprism)
White balance presets
6
8
Screen size
1.8"
2.7"
Screen resolution
200,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SmartMedia
SDHC, Secure Digital
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-100)
Lithium Ion (D-LI50)
Weight
700 g
800 g
Dimensions
100 x 145 x 107 mm
141.5 x 101 x 70 mm
Year
1999
2008




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

Fujifilm DS-260HD diagonal

The diagonal of DS-260HD sensor is not 1/2 or 0.5" (12.7 mm) as you might expect, but approximately two thirds of that value - 8 mm. If you want to know why, see sensor sizes.

w = 6.40 mm
h = 4.80 mm
Diagonal =  6.40² + 4.80²   = 8.00 mm

Pentax K20D diagonal

w = 23.40 mm
h = 15.60 mm
Diagonal =  23.40² + 15.60²   = 28.12 mm


Surface area

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

DS-260HD sensor area

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 mm²

K20D sensor area

Width = 23.40 mm
Height = 15.60 mm

Surface area = 23.40 × 15.60 = 365.04 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

DS-260HD pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 1315 pixels
Pixel pitch =   6.40  × 1000  = 4.87 µm
1315

K20D pixel pitch

Sensor width = 23.40 mm
Sensor resolution width = 4680 pixels
Pixel pitch =   23.40  × 1000  = 5 µm
4680


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

DS-260HD pixel area

Pixel pitch = 4.87 µm

Pixel area = 4.87² = 23.72 µm²

K20D pixel area

Pixel pitch = 5 µm

Pixel area = 5² = 25 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

DS-260HD pixel density

Sensor resolution width = 1315 pixels
Sensor width = 0.64 cm

Pixel density = (1315 / 0.64)² / 1000000 = 4.22 MP/cm²

K20D pixel density

Sensor resolution width = 4680 pixels
Sensor width = 2.34 cm

Pixel density = (4680 / 2.34)² / 1000000 = 4 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

DS-260HD sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 1.30
r = 6.40/4.80 = 1.33
X =  1.30 × 1000000  = 989
1.33
Resolution horizontal: X × r = 989 × 1.33 = 1315
Resolution vertical: X = 989

Sensor resolution = 1315 x 989

K20D sensor resolution

Sensor width = 23.40 mm
Sensor height = 15.60 mm
Effective megapixels = 14.60
r = 23.40/15.60 = 1.5
X =  14.60 × 1000000  = 3120
1.5
Resolution horizontal: X × r = 3120 × 1.5 = 4680
Resolution vertical: X = 3120

Sensor resolution = 4680 x 3120


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


DS-260HD crop factor

Sensor diagonal in mm = 8.00 mm
Crop factor =   43.27  = 5.41
8.00

K20D crop factor

Sensor diagonal in mm = 28.12 mm
Crop factor =   43.27  = 1.54
28.12

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).

DS-260HD equivalent aperture

Crop factor = 5.41
Aperture = f2.8 - f4.5

35-mm equivalent aperture = (f2.8 - f4.5) × 5.41 = f15.1 - f24.3

K20D 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 Pentax K20D, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Pentax K20D is 1.54

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.