Panasonic Lumix DC-TZ90 vs Panasonic Lumix DMC-TZ80 Comparison

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Lumix DC-TZ90 image
vs
Lumix DMC-TZ80 image
Panasonic Lumix DC-TZ90 Panasonic Lumix DMC-TZ80
Megapixels
20.30
18.10
Image resolution
5184 x 3888
4896 x 3672

Sensor

Sensor type
CMOS
CMOS
Sensor size
1/2.3" (approx. 6.16 x 4.62 mm)
1/2.3" (approx. 6.16 x 4.62 mm)
Sensor resolution
5196 x 3907
4906 x 3689
Diagonal
7.70 mm
7.70 mm
Compare sensor size:

Sensor Size

Actual size is set to screen
vs
1:1
(ratio)
Panasonic Lumix DC-TZ90 Panasonic Lumix DMC-TZ80
Surface area:
28.46 mm² vs 28.46 mm²
Difference: 0 mm² (0%)
Lumix DC-TZ90 and TZ80 sensors are the same size.
Pixel pitch
1.19 µm
1.26 µm
Difference: 0.07 µm (6%)
Pixel pitch of TZ80 is ~6% higher than Lumix DC-TZ90's.
Pixel area
1.42 µm²
1.59 µm²
Relative pixel sizes:
vs
Pixel area difference: 0.17 µm² (12%)
Pixel on Panasonic TZ80 sensor is ~12% bigger than Panasonic Lumix DC-TZ90's.
Pixel density
71.15 MP/cm²
63.43 MP/cm²
Difference: 7.72 µm (12%)
Panasonic Lumix DC-TZ90 has ~12% higher pixel density than Panasonic TZ80's.

Specs

Panasonic Lumix DC-TZ90
Panasonic TZ80
Crop factor
5.62
5.62
Megapixels
21.10
18.90
Optical zoom
30x
30x
Digital zoom
ISO range
Auto, 80-3200 (extends to 6400)
Auto, 80-3200 (extendable to 6400)
RAW support
Manual focus
Focus range
50 cm
50 cm
Macro focus range
3 cm
3 cm
Focal length
24 - 720 mm
24 - 720 mm
Aperture priority
Max. aperture
f3.3 - f6.4
f3.3 - f6.4
Metering types
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±5 EV (in 1/3 EV steps)
±5 EV (in 1/3 EV steps)
Shutter priority
Shutter speed (min)
4s
4s
Shutter speed (max)
1/2000s
1/2000s
Built-in flash
External flash
Viewfinder type
Electronic
Electronic
White balance
5
5
Screen size
3"
3"
Screen resolution
1,040,000 dots
1,040,000 dots
Video available
Video resolution
3840x2160
3840x2160
Video modes
30p
30p
Storage type
SD/SDHC/SDXC
SD/SDHC/SDXC
USB Version
2.0 (480 Mbit/sec)
2.0 (480 Mbit/sec)
HDMI
Wireless support
GPS
Battery
Lithium-ion battery
Lithium-ion battery
Weight
322g
282g
Body size
112 x 67.3 x 41.2 mm
112 x 64 x 38 mm
Released
2017
2016


Compare various cameras

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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

Panasonic Lumix DC-TZ90 diagonal

The diagonal of Lumix DC-TZ90 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm
Diagonal =  6.16² + 4.62²   = 7.70 mm

Panasonic TZ80 diagonal

The diagonal of TZ80 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm
Diagonal =  6.16² + 4.62²   = 7.70 mm


Surface area

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

Lumix DC-TZ90 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

TZ80 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 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

Lumix DC-TZ90 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 5196 pixels
Pixel pitch =   6.16  × 1000  = 1.19 µm
5196

TZ80 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4906 pixels
Pixel pitch =   6.16  × 1000  = 1.26 µm
4906


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

Lumix DC-TZ90 pixel area

Pixel pitch = 1.19 µm

Pixel area = 1.19² = 1.42 µm²

TZ80 pixel area

Pixel pitch = 1.26 µm

Pixel area = 1.26² = 1.59 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

Lumix DC-TZ90 pixel density

Sensor resolution width = 5196 pixels
Sensor width = 0.616 cm

Pixel density = (5196 / 0.616)² / 1000000 = 71.15 MP/cm²

TZ80 pixel density

Sensor resolution width = 4906 pixels
Sensor width = 0.616 cm

Pixel density = (4906 / 0.616)² / 1000000 = 63.43 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

Lumix DC-TZ90 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 20.30
r = 6.16/4.62 = 1.33
X =  20.30 × 1000000  = 3907
1.33
Resolution horizontal: X × r = 3907 × 1.33 = 5196
Resolution vertical: X = 3907

Sensor resolution = 5196 x 3907

TZ80 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 18.10
r = 6.16/4.62 = 1.33
X =  18.10 × 1000000  = 3689
1.33
Resolution horizontal: X × r = 3689 × 1.33 = 4906
Resolution vertical: X = 3689

Sensor resolution = 4906 x 3689


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


Lumix DC-TZ90 crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

TZ80 crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

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).

Lumix DC-TZ90 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f6.4

35-mm equivalent aperture = (f3.3 - f6.4) × 5.62 = f18.5 - f36

TZ80 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f6.4

35-mm equivalent aperture = (f3.3 - f6.4) × 5.62 = f18.5 - f36

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