Fujifilm X-A7 vs Nikon D4 Comparison

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X-A7 image
vs
D4 image
Fujifilm X-A7 Nikon D4
Megapixels
24.20
16.20
Image resolution
6000 x 4000
4928 x 3280

Sensor

Sensor type
CMOS
CMOS
Sensor size
23.5 x 15.7 mm
36 x 23.9 mm
Sensor resolution
6026 x 4017
4945 x 3275
Diagonal
28.26 mm
43.21 mm
Compare sensor size:

Sensor Size

Actual size is set to screen
vs
1:2.33
(ratio)
Fujifilm X-A7 Nikon D4
Surface area:
368.95 mm² vs 860.40 mm²
Difference: 491.45 mm² (133%)
D4 sensor is ~2.33x bigger than X-A7's.
Note: You are comparing sensors of very different generations. There is a gap of 7 years between Fujifilm X-A7 (2019) and Nikon D4 (2012). Seven years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.
Pixel pitch
3.9 µm
7.28 µm
Difference: 3.38 µm (87%)
Pixel pitch of D4 is ~87% higher than X-A7's.
Pixel area
15.21 µm²
53 µm²
Relative pixel sizes:
vs
Pixel area difference: 37.79 µm² (248%)
Pixel on Nikon D4 sensor is ~248% bigger than Fujifilm X-A7's.
Pixel density
6.58 MP/cm²
1.89 MP/cm²
Difference: 4.69 µm (248%)
Fujifilm X-A7 has ~248% higher pixel density than Nikon D4's.

Specs

Fujifilm X-A7
Nikon D4
Crop factor
1.53
1
Total megapixels
n/a
16.60
Optical zoom
n/a
Digital zoom
n/a
ISO range
Auto, 100-12800 (extendable to 25600)
100, 200, 400, 800, 1600, 3200, 6400, 12800 (204800 with boost)
RAW support
Manual focus
Focus range
n/a
Macro focus range
n/a
Focal length
n/a
Aperture priority
Max. aperture
n/a
Metering types
Multi, Average, Spot
Centre weighted, Multi-segment, Spot
Exposure compensation
±5 EV (in 1/3 EV steps)
±5 EV (in 1/3 EV, 1/2 EV, 1 EV steps)
Shutter priority
Shutter speed (min)
30s
30s
Shutter speed (max)
1/32000s
1/8000s
Built-in flash
External flash
Viewfinder type
None
Optical (pentaprism)
White balance
7
12
Screen size
3.5"
3.2"
Screen resolution
2,760,000 dots
921,000 dots
Video available
Max. video resolution
3840x2160 (30p/​25p/​24p)
Storage type
SD/SDHC/SDXC
Compact Flash (Type I, XQD) x2
USB Version
2.0 (480 Mbit/sec)
2.0 (480 Mbit/sec)
HDMI
Wireless support
GPS
Battery
NP-W126S lithium-ion battery
Lithium-Ion EN-EL18 rechargeable battery
Weight
320g
1340g
Body size
119 x 67.7 x 41.1 mm
160 x 157 x 91 mm
Released
2019
2012


Compare various cameras

vs

Diagonal

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

Fujifilm X-A7 diagonal

w = 23.50 mm
h = 15.70 mm
Diagonal =  23.50² + 15.70²   = 28.26 mm

Nikon D4 diagonal

w = 36.00 mm
h = 23.90 mm
Diagonal =  36.00² + 23.90²   = 43.21 mm


Surface area

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

X-A7 sensor area

Width = 23.50 mm
Height = 15.70 mm

Surface area = 23.50 × 15.70 = 368.95 mm²

D4 sensor area

Width = 36.00 mm
Height = 23.90 mm

Surface area = 36.00 × 23.90 = 860.40 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

X-A7 pixel pitch

Sensor width = 23.50 mm
Sensor resolution width = 6026 pixels
Pixel pitch =   23.50  × 1000  = 3.9 µm
6026

D4 pixel pitch

Sensor width = 36.00 mm
Sensor resolution width = 4945 pixels
Pixel pitch =   36.00  × 1000  = 7.28 µm
4945


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

X-A7 pixel area

Pixel pitch = 3.9 µm

Pixel area = 3.9² = 15.21 µm²

D4 pixel area

Pixel pitch = 7.28 µm

Pixel area = 7.28² = 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

X-A7 pixel density

Sensor resolution width = 6026 pixels
Sensor width = 2.35 cm

Pixel density = (6026 / 2.35)² / 1000000 = 6.58 MP/cm²

D4 pixel density

Sensor resolution width = 4945 pixels
Sensor width = 3.6 cm

Pixel density = (4945 / 3.6)² / 1000000 = 1.89 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

X-A7 sensor resolution

Sensor width = 23.50 mm
Sensor height = 15.70 mm
Effective megapixels = 24.20
r = 23.50/15.70 = 1.5
X =  24.20 × 1000000  = 4017
1.5
Resolution horizontal: X × r = 4017 × 1.5 = 6026
Resolution vertical: X = 4017

Sensor resolution = 6026 x 4017

D4 sensor resolution

Sensor width = 36.00 mm
Sensor height = 23.90 mm
Effective megapixels = 16.20
r = 36.00/23.90 = 1.51
X =  16.20 × 1000000  = 3275
1.51
Resolution horizontal: X × r = 3275 × 1.51 = 4945
Resolution vertical: X = 3275

Sensor resolution = 4945 x 3275


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


X-A7 crop factor

Sensor diagonal in mm = 28.26 mm
Crop factor =   43.27  = 1.53
28.26

D4 crop factor

Sensor diagonal in mm = 43.21 mm
Crop factor =   43.27  = 1
43.21

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).

X-A7 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 Fujifilm X-A7, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Fujifilm X-A7 is 1.53

D4 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 D4, take the aperture of the lens you're using and multiply it with crop factor.

Since crop factor for Nikon D4 is 1, the equivalent aperture is aperture.

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