Ricoh GR Digital 3 vs. Sigma DP1 Merrill
Comparison
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| Ricoh GR Digital 3 | Sigma DP1 Merrill | ||||
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Megapixels
10.40
15.40
Max. image resolution
3648 x 2736
Note: Sigma DP1 Merrill uses Foveon X3 image sensor, which is a new type of sensor that
has 3 layers of photoelements stacked together in 1 pixel location. Traditional
CCD/CMOS sensors have 1 pixel for 1 color, whereas Foveon sensor captures all
3 colors (blue, green, and red) at every pixel.
Sensor
Sensor type
CCD
Foveon
Sensor size
1/1.7" (~ 7.53 x 5.64 mm)
24 x 16 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 | : | 9.04 |
| (ratio) | ||
| Ricoh GR Digital 3 | Sigma DP1 Merrill | |
Surface area:
| 42.47 mm² | vs | 384.00 mm² |
Difference: 341.53 mm² (804%)
DP1 Merrill sensor is approx. 9.04x bigger than GR 3 sensor.
Note: You are comparing cameras of different generations.
There is a 3 year gap between Ricoh GR 3 (2009) and Sigma DP1 Merrill (2012).
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: 20.82 µm² (510%)
A pixel on Sigma DP1 Merrill sensor is approx. 510% bigger than a pixel on Ricoh GR 3.
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
Ricoh GR 3
Sigma DP1 Merrill
Total megapixels
15.40
Effective megapixels
15.40
Optical zoom
1x
Digital zoom
Yes
ISO sensitivity
Auto, 64, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
30 cm
Macro focus range
1 cm
Focal length (35mm equiv.)
28 mm
Aperture priority
Yes
Max. aperture
f1.9
f2.8
Metering
256-segment Matrix, Centre weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
Shutter priority
No
Min. shutter speed
1 sec
Max. shutter speed
1/2000 sec
Built-in flash
External flash
Viewfinder
Optical (optional)
None
White balance presets
6
Screen size
3"
Screen resolution
920,000 dots
920,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion DB-70 rechargeable battery
Weight
188 g
330 g
Dimensions
109 x 59 x 26 mm
122 x 67 x 64 mm
Year
2009
2012
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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 |
Ricoh GR 3 diagonal
The diagonal of GR 3 sensor is not 1/1.7 or 0.59" (14.9 mm) as you might expect, but approximately two thirds of
that value - 9.41 mm. If you want to know why, see
sensor sizes.
w = 7.53 mm
h = 5.64 mm
w = 7.53 mm
h = 5.64 mm
| Diagonal = √ | 7.53² + 5.64² | = 9.41 mm |
Sigma DP1 Merrill diagonal
w = 24.00 mm
h = 16.00 mm
h = 16.00 mm
| Diagonal = √ | 24.00² + 16.00² | = 28.84 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
GR 3 sensor area
Width = 7.53 mm
Height = 5.64 mm
Surface area = 7.53 × 5.64 = 42.47 mm²
Height = 5.64 mm
Surface area = 7.53 × 5.64 = 42.47 mm²
DP1 Merrill sensor area
Width = 24.00 mm
Height = 16.00 mm
Surface area = 24.00 × 16.00 = 384.00 mm²
Height = 16.00 mm
Surface area = 24.00 × 16.00 = 384.00 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 |
GR 3 pixel pitch
Sensor width = 7.53 mm
Sensor resolution width = 3733 pixels
Sensor resolution width = 3733 pixels
| Pixel pitch = | 7.53 | × 1000 | = 2.02 µm |
| 3733 |
DP1 Merrill pixel pitch
Sensor width = 24.00 mm
Sensor resolution width = 4806 pixels
Sensor resolution width = 4806 pixels
| Pixel pitch = | 24.00 | × 1000 | = 4.99 µm |
| 4806 |
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 |
GR 3 pixel area
Pixel pitch = 2.02 µm
Pixel area = 2.02² = 4.08 µm²
Pixel area = 2.02² = 4.08 µm²
DP1 Merrill pixel area
Pixel pitch = 4.99 µm
Pixel area = 4.99² = 24.9 µm²
Pixel area = 4.99² = 24.9 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 |
GR 3 pixel density
Sensor resolution width = 3733 pixels
Sensor width = 0.753 cm
Pixel density = (3733 / 0.753)² / 1000000 = 24.58 MP/cm²
Sensor width = 0.753 cm
Pixel density = (3733 / 0.753)² / 1000000 = 24.58 MP/cm²
DP1 Merrill pixel density
Sensor resolution width = 4806 pixels
Sensor width = 2.4 cm
Pixel density = (4806 / 2.4)² / 1000000 = 4.01 MP/cm²
Sensor width = 2.4 cm
Pixel density = (4806 / 2.4)² / 1000000 = 4.01 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 → |
|
Resolution horizontal: X × r
Resolution vertical: X
GR 3 sensor resolution
Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 10.40
Resolution horizontal: X × r = 2786 × 1.34 = 3733
Resolution vertical: X = 2786
Sensor resolution = 3733 x 2786
Sensor height = 5.64 mm
Effective megapixels = 10.40
| r = 7.53/5.64 = 1.34 |
|
Resolution vertical: X = 2786
Sensor resolution = 3733 x 2786
DP1 Merrill sensor resolution
Sensor width = 24.00 mm
Sensor height = 16.00 mm
Effective megapixels = 15.40
Resolution horizontal: X × r = 3204 × 1.5 = 4806
Resolution vertical: X = 3204
Sensor resolution = 4806 x 3204
Sensor height = 16.00 mm
Effective megapixels = 15.40
| r = 24.00/16.00 = 1.5 |
|
Resolution vertical: X = 3204
Sensor resolution = 4806 x 3204
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 |
GR 3 crop factor
Sensor diagonal in mm = 9.41 mm
| Crop factor = | 43.27 | = 4.6 |
| 9.41 |
DP1 Merrill crop factor
Sensor diagonal in mm = 28.84 mm
| Crop factor = | 43.27 | = 1.5 |
| 28.84 |
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).
GR 3 equivalent aperture
Crop factor = 4.6
Aperture = f1.9
35-mm equivalent aperture = (f1.9) × 4.6 = f8.7
Aperture = f1.9
35-mm equivalent aperture = (f1.9) × 4.6 = f8.7
DP1 Merrill equivalent aperture
Crop factor = 1.5
Aperture = f2.8
35-mm equivalent aperture = (f2.8) × 1.5 = f4.2
Aperture = f2.8
35-mm equivalent aperture = (f2.8) × 1.5 = f4.2
More comparisons of Ricoh GR 3:
- Ricoh GR Digital 3 vs. Fujifilm X10
- Ricoh GR Digital 3 vs. Sony Cyber-shot DSC-RX1R
- Ricoh GR Digital 3 vs. Fujifilm X20
- Ricoh GR Digital 3 vs. Panasonic Lumix DMC-GM1
- Ricoh GR Digital 3 vs. Ricoh GR II
- Ricoh GR Digital 3 vs. Canon PowerShot G9
- Ricoh GR Digital 3 vs. Fujifilm X100S
- Ricoh GR Digital 3 vs. Canon PowerShot G15
- Ricoh GR Digital 3 vs. Pentax K-S2
- Ricoh GR Digital 3 vs. Nikon D800
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