Sony Alpha SLT-A77 II vs. Panasonic Lumix DMC-FZ1000

Comparison

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Alpha SLT-A77 II image
vs
Lumix DMC-FZ1000 image
Sony Alpha SLT-A77 II Panasonic Lumix DMC-FZ1000
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Megapixels
24.30
20.10
Max. image resolution
6000 x 4000
5472 x 3648

Sensor

Sensor type
CMOS
CMOS
Sensor size
23.5 x 15.6 mm
13.2 x 8.8 mm
Sensor resolution
6058 x 4012
5492 x 3661
Diagonal
28.21 mm
15.86 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
3.16 : 1
(ratio)
Sony Alpha SLT-A77 II Panasonic Lumix DMC-FZ1000
Surface area:
366.60 mm² vs 116.16 mm²
Difference: 250.44 mm² (216%)
Alpha SLT-A77 II sensor is approx. 3.16x bigger than FZ1000 sensor.
Pixel pitch
3.88 µm
2.4 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: 1.48 µm (62%)
Pixel pitch of Alpha SLT-A77 II is approx. 62% higher than pixel pitch of FZ1000.
Pixel area
15.05 µm²
5.76 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: 9.29 µm² (161%)
A pixel on Sony Alpha SLT-A77 II sensor is approx. 161% bigger than a pixel on Panasonic FZ1000.
Pixel density
6.65 MP/cm²
17.31 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: 10.66 µm (160%)
Panasonic FZ1000 has approx. 160% higher pixel density than Sony Alpha SLT-A77 II.
To learn about the accuracy of these numbers, click here.



Specs

Sony Alpha SLT-A77 II
Panasonic FZ1000
Crop factor
1.53
2.73
Total megapixels
24.70
20.90
Effective megapixels
24.30
20.10
Optical zoom
16x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100-51200
Auto, 125-12800 (expands to 80-25600)
RAW
Manual focus
Normal focus range
30 cm
Macro focus range
3 cm
Focal length (35mm equiv.)
25 - 400 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f4.0
Max. aperture (35mm equiv.)
n/a
f7.6 - f10.9
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±5 EV (in 1/3 EV, 1/2 EV steps)
±5 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
60 sec
Max. shutter speed
1/8000 sec
1/16000 sec
Built-in flash
External flash
Viewfinder
Electronic
Electronic
White balance presets
9
5
Screen size
3"
3"
Screen resolution
1,228,000 dots
921,000 dots
Video capture
Max. video resolution
1920x1080 (60p/60i/30p)
3840x2160 (30p)
Storage types
SD/SDHC/SDXC, Memory Stick Pro Duo/Pro-HG Duo
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
NP-FM500H
Li-ion battery pack
Weight
647 g
831 g
Dimensions
142.6 x 104.2 x 80.9 mm
136.8 x 98.5 x 130.7 mm
Year
2014
2014




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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

Sony Alpha SLT-A77 II diagonal

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

Panasonic FZ1000 diagonal

w = 13.20 mm
h = 8.80 mm
Diagonal =  13.20² + 8.80²   = 15.86 mm


Surface area

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

Alpha SLT-A77 II sensor area

Width = 23.50 mm
Height = 15.60 mm

Surface area = 23.50 × 15.60 = 366.60 mm²

FZ1000 sensor area

Width = 13.20 mm
Height = 8.80 mm

Surface area = 13.20 × 8.80 = 116.16 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

Alpha SLT-A77 II pixel pitch

Sensor width = 23.50 mm
Sensor resolution width = 6058 pixels
Pixel pitch =   23.50  × 1000  = 3.88 µm
6058

FZ1000 pixel pitch

Sensor width = 13.20 mm
Sensor resolution width = 5492 pixels
Pixel pitch =   13.20  × 1000  = 2.4 µm
5492


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

Alpha SLT-A77 II pixel area

Pixel pitch = 3.88 µm

Pixel area = 3.88² = 15.05 µm²

FZ1000 pixel area

Pixel pitch = 2.4 µm

Pixel area = 2.4² = 5.76 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

Alpha SLT-A77 II pixel density

Sensor resolution width = 6058 pixels
Sensor width = 2.35 cm

Pixel density = (6058 / 2.35)² / 1000000 = 6.65 MP/cm²

FZ1000 pixel density

Sensor resolution width = 5492 pixels
Sensor width = 1.32 cm

Pixel density = (5492 / 1.32)² / 1000000 = 17.31 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

Alpha SLT-A77 II sensor resolution

Sensor width = 23.50 mm
Sensor height = 15.60 mm
Effective megapixels = 24.30
r = 23.50/15.60 = 1.51
X =  24.30 × 1000000  = 4012
1.51
Resolution horizontal: X × r = 4012 × 1.51 = 6058
Resolution vertical: X = 4012

Sensor resolution = 6058 x 4012

FZ1000 sensor resolution

Sensor width = 13.20 mm
Sensor height = 8.80 mm
Effective megapixels = 20.10
r = 13.20/8.80 = 1.5
X =  20.10 × 1000000  = 3661
1.5
Resolution horizontal: X × r = 3661 × 1.5 = 5492
Resolution vertical: X = 3661

Sensor resolution = 5492 x 3661


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


Alpha SLT-A77 II crop factor

Sensor diagonal in mm = 28.21 mm
Crop factor =   43.27  = 1.53
28.21

FZ1000 crop factor

Sensor diagonal in mm = 15.86 mm
Crop factor =   43.27  = 2.73
15.86

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).

Alpha SLT-A77 II 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 Sony Alpha SLT-A77 II, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Sony Alpha SLT-A77 II is 1.53

FZ1000 equivalent aperture

Crop factor = 2.73
Aperture = f2.8 - f4.0

35-mm equivalent aperture = (f2.8 - f4.0) × 2.73 = f7.6 - f10.9

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