Ricoh GR

Specs

Brand: Ricoh
Model: GR
Megapixels: 16.20
Sensor: 23.6 x 15.7 mm
Price: check here »

Sensor info

Ricoh GR comes with a 23.6 x 15.7 mm CMOS sensor, which has a diagonal of 28.35 mm (1.12") and a surface area of 370.52 mm².
Diagonal
28.35 mm
Surface area
370.5 mm²
Pixel pitch
4.79 µm
Pixel area
22.94 µm²
Pixel density
4.36 MP/cm²
If you want to know about the accuracy of these numbers, click here.

Actual sensor size

Note: Actual size is set to screen → change »
This is the actual size of the GR sensor: 23.6 x 15.7 mm
The sensor has a surface area of 370.5 mm². There are approx. 16,200,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 4.79 µm. Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next.

Pixel or photosite area is 22.94 µm². The larger the photosite, the more light it can capture and the more information can be recorded.

Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Ricoh GR has a pixel density of 4.36 MP/cm².

These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how GR compares to other cameras, click here.

Specifications

Brand: Ricoh
Model: GR
Effective megapixels: 16.20
Total megapixels: 16.90
Sensor size: 23.6 x 15.7 mm
Sensor type: CMOS
Sensor resolution: 4929 x 3286
Max. image resolution: 4928 x 3264
Crop factor: 1.53
Optical zoom: 1x
Digital zoom: No
ISO: Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800, 16000, 25600
RAW support:
Manual focus:
Normal focus range: 30 cm
Macro focus range: 10 cm
Focal length (35mm equiv.): 28 mm
Aperture priority: Yes
Max aperture: f2.8 - f16
Max. aperture (35mm equiv.): f4.3 - f24.5
Depth of field: simulate →
Metering: Multi, Center-weighted, Spot
Exposure Compensation: ±4 EV (in 1/3 EV steps)
Shutter priority: Yes
Min. shutter speed: 300 sec
Max. shutter speed: 1/4000 sec
Built-in flash:
External flash:
Viewfinder: Optical (optional)
White balance presets: 9
Screen size: 3"
Screen resolution: 1,230,000 dots
Video capture:
Storage types: SD/SDHC/SDXC
USB: USB 2.0 (480 Mbit/sec)
HDMI:
Wireless:
GPS:
Battery: Rechargeable DB-65 lithium-ion battery
Weight: 245 g
Dimensions: 117 x 61 x 34.7 mm
Year: 2013

Compare GR with another camera

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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 diagonal:

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


Surface area

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

Width = 23.60 mm
Height = 15.70 mm

Surface area = 23.60 × 15.70 = 370.52 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

Ricoh GR pixel pitch:

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


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

Ricoh GR pixel area:

Pixel pitch = 4.79 µm

Pixel area = 4.79² = 22.94 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Ricoh GR pixel density:

Sensor resolution width = 4929 pixels
Sensor width = 2.36 cm

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

Ricoh GR 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


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


Ricoh GR crop factor:

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

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).

Ricoh GR equivalent aperture:

Crop factor = 1.53
Aperture = f2.8 - f16

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


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