Nikon D7100


Brand: Nikon
Model: D7100
Megapixels: 24.10
Sensor: 23.5 x 15.6 mm
Price: check here »

Sensor info

Nikon D7100 comes with a 23.5 x 15.6 mm CMOS sensor, which has a diagonal of 28.21 mm (1.11") and a surface area of 366.60 mm².
28.21 mm
Surface area
366.6 mm²
Pixel pitch
3.9 µm
Pixel area
15.21 µm²
Pixel density
6.59 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 D7100 sensor: 23.5 x 15.6 mm
The sensor has a surface area of 366.6 mm². There are approx. 24,100,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 3.9 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 15.21 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. Nikon D7100 has a pixel density of 6.59 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 D7100 compares to other cameras, click here.


Brand: Nikon
Model: D7100
Effective megapixels: 24.10
Total megapixels: 24.71
Sensor size: 23.5 x 15.6 mm
Sensor type: CMOS
Sensor resolution: 6032 x 3995
Max. image resolution: 6000 x 4000
Crop factor: 1.53
Optical zoom:
Digital zoom: No
ISO: Auto, 100 - 6400, Hi-1 (ISO 12800), Hi-2 (ISO 25600)
RAW support:
Manual focus:
Normal focus range:
Macro focus range:
Focal length (35mm equiv.):
Aperture priority: Yes
Max aperture:
Max. aperture (35mm equiv.): n/a
Depth of field: simulate →
Metering: Matrix, Center-weighted, Spot
Exposure Compensation: ±5 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority: Yes
Min. shutter speed: 30 sec
Max. shutter speed: 1/8000 sec
Built-in flash:
External flash:
Viewfinder: Optical (pentaprism)
White balance presets: 12
Screen size: 3.2"
Screen resolution: 1,228,800 dots
Video capture:
Max. video resolution: 1920x1080 (60i/50i/30p/25p/24p)
Storage types: SD/SDHC/SDXC x 2
USB: USB 2.0 (480 Mbit/sec)
Battery: Lithium-Ion EN-EL15 rechargeable battery
Weight: 675 g
Dimensions: 135.5 x 106.5 x 76 mm
Year: 2013

Compare D7100 with another camera



Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Nikon D7100 diagonal:

w = 23.50 mm
h = 15.60 mm
Diagonal =  23.50² + 15.60²   = 28.21 mm

Surface area

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

Width = 23.50 mm
Height = 15.60 mm

Surface area = 23.50 × 15.60 = 366.60 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

Nikon D7100 pixel pitch:

Sensor width = 23.50 mm
Sensor resolution width = 6032 pixels
Pixel pitch =   23.50  × 1000  = 3.9 µm

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

Nikon D7100 pixel area:

Pixel pitch = 3.9 µm

Pixel area = 3.9² = 15.21 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

Nikon D7100 pixel density:

Sensor resolution width = 6032 pixels
Sensor width = 2.35 cm

Pixel density = (6032 / 2.35)² / 1000000 = 6.59 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
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

Nikon D7100 sensor resolution:

Sensor width = 23.50 mm
Sensor height = 15.60 mm
Effective megapixels = 24.10
r = 23.50/15.60 = 1.51
X =  24.10 × 1000000  = 3995
Resolution horizontal: X × r = 3995 × 1.51 = 6032
Resolution vertical: X = 3995

Sensor resolution = 6032 x 3995

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

Nikon D7100 crop factor:

Sensor diagonal = 28.21 mm
Crop factor =   43.27  = 1.53

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).

Nikon D7100 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 D7100, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Nikon D7100 is 1.53

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.