Ricoh GR II vs. Pentax MX-1

Comparison

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GR II image
vs
MX-1 image
Ricoh GR II Pentax MX-1
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Megapixels
16.20
12.00
Max. image resolution
4928 x 3264
4000 x 3000

Sensor

Sensor type
CMOS
CMOS
Sensor size
23.6 x 15.7 mm
1/1.7" (~ 7.53 x 5.64 mm)
Sensor resolution
4929 x 3286
4011 x 2993
Diagonal
28.35 mm
9.41 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
8.72 : 1
(ratio)
Ricoh GR II Pentax MX-1
Surface area:
370.52 mm² vs 42.47 mm²
Difference: 328.05 mm² (772%)
GR II sensor is approx. 8.72x bigger than MX-1 sensor.
Note: You are comparing cameras of different generations. There is a 2 year gap between Ricoh GR II (2015) and Pentax MX-1 (2013). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
4.79 µm
1.88 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: 2.91 µm (155%)
Pixel pitch of GR II is approx. 155% higher than pixel pitch of MX-1.
Pixel area
22.94 µm²
3.53 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: 19.41 µm² (550%)
A pixel on Ricoh GR II sensor is approx. 550% bigger than a pixel on Pentax MX-1.
Pixel density
4.36 MP/cm²
28.37 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: 24.01 µm (551%)
Pentax MX-1 has approx. 551% higher pixel density than Ricoh GR II.
To learn about the accuracy of these numbers, click here.



Specs

Ricoh GR II
Pentax MX-1
Crop factor
1.53
4.6
Total megapixels
16.90
12.76
Effective megapixels
16.20
12.00
Optical zoom
1x
4x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100-25600
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800
RAW
Manual focus
Normal focus range
30 cm
60 cm
Macro focus range
10 cm
1 cm
Focal length (35mm equiv.)
28 mm
28 - 112 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f16
f1.8 - f2.5
Max. aperture (35mm equiv.)
f4.3 - f24.5
f8.3 - f11.5
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±4 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
300 sec
30 sec
Max. shutter speed
1/4000 sec
1/8000 sec
Built-in flash
External flash
Viewfinder
Optical (optional)
None
White balance presets
10
9
Screen size
3"
3"
Screen resolution
1,230,000 dots
920,000 dots
Video capture
Max. video resolution
1920x1080 (30p/25p/24p)
Storage types
SD/SDHC/SDXC
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Rechargeable Li-Ion battery DB-65
Lithium-Ion D-Li-106 rechargeable battery
Weight
251 g
391 g
Dimensions
117 x 63 x 35 mm
122 x 61 x 51 mm
Year
2015
2013




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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

Ricoh GR II diagonal

w = 23.60 mm
h = 15.70 mm
Diagonal =  23.60² + 15.70²   = 28.35 mm

Pentax MX-1 diagonal

The diagonal of MX-1 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
Diagonal =  7.53² + 5.64²   = 9.41 mm


Surface area

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

GR II sensor area

Width = 23.60 mm
Height = 15.70 mm

Surface area = 23.60 × 15.70 = 370.52 mm²

MX-1 sensor area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 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 II pixel pitch

Sensor width = 23.60 mm
Sensor resolution width = 4929 pixels
Pixel pitch =   23.60  × 1000  = 4.79 µm
4929

MX-1 pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 4011 pixels
Pixel pitch =   7.53  × 1000  = 1.88 µm
4011


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

GR II pixel area

Pixel pitch = 4.79 µm

Pixel area = 4.79² = 22.94 µm²

MX-1 pixel area

Pixel pitch = 1.88 µm

Pixel area = 1.88² = 3.53 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

GR II pixel density

Sensor resolution width = 4929 pixels
Sensor width = 2.36 cm

Pixel density = (4929 / 2.36)² / 1000000 = 4.36 MP/cm²

MX-1 pixel density

Sensor resolution width = 4011 pixels
Sensor width = 0.753 cm

Pixel density = (4011 / 0.753)² / 1000000 = 28.37 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

GR II sensor resolution

Sensor width = 23.60 mm
Sensor height = 15.70 mm
Effective megapixels = 16.20
r = 23.60/15.70 = 1.5
X =  16.20 × 1000000  = 3286
1.5
Resolution horizontal: X × r = 3286 × 1.5 = 4929
Resolution vertical: X = 3286

Sensor resolution = 4929 x 3286

MX-1 sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 12.00
r = 7.53/5.64 = 1.34
X =  12.00 × 1000000  = 2993
1.34
Resolution horizontal: X × r = 2993 × 1.34 = 4011
Resolution vertical: X = 2993

Sensor resolution = 4011 x 2993


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 II crop factor

Sensor diagonal in mm = 28.35 mm
Crop factor =   43.27  = 1.53
28.35

MX-1 crop factor

Sensor diagonal in mm = 9.41 mm
Crop factor =   43.27  = 4.6
9.41

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 II equivalent aperture

Crop factor = 1.53
Aperture = f2.8 - f16

35-mm equivalent aperture = (f2.8 - f16) × 1.53 = f4.3 - f24.5

MX-1 equivalent aperture

Crop factor = 4.6
Aperture = f1.8 - f2.5

35-mm equivalent aperture = (f1.8 - f2.5) × 4.6 = f8.3 - f11.5

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