Panasonic GH5 vs Pentax 645Z

Panasonic Lumix DMC-GH5 front
Pentax 645Z front

Panasonic GH5 vs Pentax 645Z Key Specs

Panasonic GH5
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3.2" Fully Articulated Screen
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Maximum Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 725g - 139 x 98 x 87mm
  • Launched January 2017
  • Earlier Model is Panasonic GH4
  • Successor is Panasonic GH5 II
Pentax 645Z
(Full Review)
  • 51MP - Medium format Sensor
  • 3.2" Tilting Display
  • ISO 100 - 204800
  • No Anti-Alias Filter
  • 1920 x 1080 video
  • Pentax 645AF2 Mount
  • 1550g - 156 x 117 x 123mm
  • Introduced April 2014
  • Superseded the Pentax 645D
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Panasonic GH5 vs Pentax 645Z Overview

Here is a detailed comparison of the Panasonic GH5 vs Pentax 645Z, one being a Pro Mirrorless and the other is a Pro DSLR by manufacturers Panasonic and Pentax. There exists a crucial gap between the image resolutions of the GH5 (20MP) and 645Z (51MP) and the GH5 (Four Thirds) and 645Z (Medium format) use different sensor measurements.

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The GH5 was revealed 2 years later than the 645Z and that is quite a serious gap as far as technology is concerned. Each of these cameras come with different body type with the Panasonic GH5 being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before getting straight into a step-by-step comparison, below is a concise summation of how the GH5 matches up versus the 645Z in relation to portability, imaging, features and an overall rating.

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Reasons to pick Panasonic GH5 over the Pentax 645Z

 GH5 645Z 
IntroducedJanuary 2017April 2014Fresher by 34 months
Display typeFully ArticulatedTiltingFully Articulating display
Display resolution1620k1037kClearer display (+583k dot)
Selfie screen Easy selfies
Touch friendly display Easily navigate

Reasons to pick Pentax 645Z over the Panasonic GH5

 645Z GH5 

Common features in the Panasonic GH5 and Pentax 645Z

 GH5 645Z 
Manual focus Dial accurate focus
Display dimension3.2"3.2"Identical display measurements

Panasonic GH5 vs Pentax 645Z Physical Comparison

For anyone who is looking to carry your camera regularly, you will need to think about its weight and dimensions. The Panasonic GH5 comes with outside measurements of 139mm x 98mm x 87mm (5.5" x 3.9" x 3.4") accompanied by a weight of 725 grams (1.60 lbs) and the Pentax 645Z has dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") accompanied by a weight of 1550 grams (3.42 lbs).

Take a look at the Panasonic GH5 vs Pentax 645Z in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Don't forget, the weight of an Interchangeable Lens Camera will vary based on the lens you are working with at that time. Here is the front view physical size comparison of the GH5 compared to the 645Z.

Panasonic GH5 vs Pentax 645Z size comparison

Considering dimensions and weight, the portability score of the GH5 and 645Z is 59 and 49 respectively.

Panasonic GH5 vs Pentax 645Z top view buttons comparison

Panasonic GH5 vs Pentax 645Z Sensor Comparison

Typically, it is very tough to visualize the difference between sensor sizing just by looking at specs. The visual below should offer you a clearer sense of the sensor sizing in the GH5 and 645Z.

All in all, the two cameras posses different megapixel count and different sensor sizing. The GH5 with its tinier sensor is going to make shooting bokeh tougher and the Pentax 645Z will give more detail because of its extra 31MP. Greater resolution will also allow you to crop pics somewhat more aggressively. The more recent GH5 provides an advantage in sensor innovation.

Panasonic GH5 vs Pentax 645Z sensor size comparison

Panasonic GH5 vs Pentax 645Z Screen and ViewFinder

Panasonic GH5 vs Pentax 645Z Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Panasonic GH5
Portrait photography with Pentax 645Z
manual focus
resolution is good (20 megapixels)
decent sensor size (Four Thirds)
supports face detection focusing
delivers RAW formats
manual focus
sensor resolution is high (51 megapixels)
great sensor size (Medium format)
provides face detect autofocus
saves RAW formats
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Street Comparison

Panasonic GH5 Street photography highlights
Pentax 645Z Street photography highlights
fully articulated screen
image stabilization (Sensor based 5-axis)
decent sensor size (Four Thirds)
delivers RAW formats
offers focus by touch
environment proof
very good high ISO (25,600)
screen tilts
great sensor size (Medium format)
saves RAW formats
weather sealing
above average ISO range (204,800)
does not have image stabilization
more heavy than average (1,550g)
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Sports Comparison

Panasonic GH5 Sports photography information
Pentax 645Z Sports photography information
high shutter speed (1/8,000s)
quiet mode (1/16,000s)
image stabilization (Sensor based 5-axis)
resolution is good (20MP)
decent sensor size (Four Thirds)
supports tracking autofocus
environment proof
terrible battery life (410 shots)
lack of phase detect AF
sensor resolution is high (51MP)
great sensor size (Medium format)
provides tracking focus
weather sealing
has phase detect autofocus
slow fps (3.0 frames/s)
does not have image stabilization
bad battery (650 per charge)
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Travel Comparison

Panasonic GH5 Travel photography features
Pentax 645Z Travel photography features
environment proof
connects via bluetooth
offers focus by touch
resolution is good (20MP)
display is selfie friendly
terrible battery life (410 per charge)
weather sealing
sensor resolution is high (51MP)
bad battery (650 shots)
more heavy than average (1,550 grams)
doesn't have a selfie friendly screen
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Landscape Comparison

Panasonic GH5 Landscape photography features
Pentax 645Z Landscape photography features
manual focus
interchangeable lenses (Micro Four Thirds mount)
screen size is good (3.2 inches)
image stabilization (Sensor based 5-axis)
resolution is good (20 megapixels)
decent sensor size (Four Thirds)
no anti aliasing filter
very good high ISO (25,600)
delivers RAW formats
environment proof
has double storage slots
terrible battery life (410 shots)
manual focus
swap lenses (Pentax 645AF2 mount)
nice screen size (3.2 inch)
sensor resolution is high (51 megapixels)
great sensor size (Medium format)
does not have low pass filter
above average ISO range (204,800)
saves RAW formats
weather sealing
two card slots
does not have image stabilization
bad battery (650 shots)
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Vlogging Comparison

Panasonic GH5 Vlogging info
Pentax 645Z Vlogging info
display is selfie friendly
touch screen
image stabilization (Sensor based 5-axis)
supports face detection focusing
video res high (4096 x 2160 resolution)
includes external mic port
provides face detect autofocus
video res high (1920 x 1080 resolution)
has microphone socket
doesn't have a selfie friendly screen
does not have image stabilization
more heavy than average (1,550g)
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Panasonic GH5 vs Pentax 645Z Specifications

Detailed spec comparison table for Panasonic GH5 and Pentax 645Z
 Panasonic Lumix DMC-GH5Pentax 645Z
General Information
Manufacturer Panasonic Pentax
Model type Panasonic Lumix DMC-GH5 Pentax 645Z
Type Pro Mirrorless Pro DSLR
Launched 2017-01-04 2014-04-15
Physical type SLR-style mirrorless Large SLR
Sensor Information
Processor Venus Engine PRIME III
Sensor type CMOS CMOS
Sensor size Four Thirds Medium format
Sensor measurements 17.3 x 13mm 44 x 33mm
Sensor area 224.9mm² 1,452.0mm²
Sensor resolution 20MP 51MP
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 4:3
Highest resolution 5184 x 3888 8256 x 6192
Highest native ISO 25600 204800
Min native ISO 200 100
RAW files
Min boosted ISO 100 -
Focus manually
Touch focus
Continuous AF
Single AF
Tracking AF
Selective AF
Center weighted AF
AF multi area
AF live view
Face detection focusing
Contract detection focusing
Phase detection focusing
Total focus points 225 27
Lens mount type Micro Four Thirds Pentax 645AF2
Available lenses 107 6
Crop factor 2.1 0.8
Type of screen Fully Articulated Tilting
Screen size 3.2 inch 3.2 inch
Screen resolution 1,620k dots 1,037k dots
Selfie friendly
Touch friendly
Viewfinder Information
Viewfinder Electronic Optical (pentaprism)
Viewfinder resolution 3,680k dots -
Viewfinder coverage 100 percent 98 percent
Viewfinder magnification 0.76x 0.85x
Slowest shutter speed 60 secs 30 secs
Maximum shutter speed 1/8000 secs 1/4000 secs
Maximum silent shutter speed 1/16000 secs -
Continuous shooting rate 12.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Set WB
Image stabilization
Built-in flash
Flash distance no built-in flash no built-in flash
Flash modes Auto, Auto/Redeye Reduction, Forced On, Forced On w/Redeye Reduction, Slow Sync, Slow Sync w/Redeye Reduction, Forced Off Flash On, Flash On+Red-eye Reduction, Slow-speed Sync, Slow-speed Sync+Red-eye, P-TTL, Trailing Curtain Sync, contrast-control-sync, high-speed sync, wireless sync
Hot shoe
AE bracketing
White balance bracketing
Maximum flash synchronize - 1/125 secs
AF area
Center weighted
Video features
Video resolutions 4096 x 2160 (24p), 3840 x 2160 (60p, 50p, 30p, 25p, 24p), 1920 x 1080 (60p, 50p, 30p, 25p, 24p) 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p)
Highest video resolution 4096x2160 1920x1080
Video format MPEG-4, AVCHD, H.264 MPEG-4, H.264
Microphone port
Headphone port
Wireless Built-In None
USB USB 3.1 Gen 1(5 GBit/sec) USB 3.0 (5 GBit/sec)
GPS None Optional
Environment sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 725 grams (1.60 lbs) 1550 grams (3.42 lbs)
Dimensions 139 x 98 x 87mm (5.5" x 3.9" x 3.4") 156 x 117 x 123mm (6.1" x 4.6" x 4.8")
DXO scores
DXO All around rating 77 101
DXO Color Depth rating 23.9 26.0
DXO Dynamic range rating 13.0 14.7
DXO Low light rating 807 4505
Battery life 410 photos 650 photos
Type of battery Battery Pack Battery Pack
Battery ID - D-LI90
Self timer Yes (2 or 10 secs; 10 secs w/3 shots) Yes (2 or 10 secs)
Time lapse feature
Type of storage Dual SD/SDHC/SDXC (UHS-II compatible) Dual SD/SDHC/SDXC slots
Card slots 2 2
Cost at launch $1,298 $5,024