Pentax 645Z vs Sony A7 II

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Pentax 645Z vs Sony A7 II

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Medium format 1,436.6mm²
51.4 megapixels
ISO 100 - 204,800

Go in depth with our full Pentax 645Z Review.
How does it shoot? Pentax 645Z in the real world.
See real-world photos taken with the 645Z.
Compare Pentax 645Z image quality against competitors.
What’s the bottom line? Read our Pentax 645Z conclusion.

35mm 855.6mm²
24.3 megapixels
ISO 100 - 25,600

Go in depth with our full Sony A7 II Review.
How does it shoot? Sony A7 II in the real world.
See real-world photos taken with the A7 II.
Compare Sony A7 II image quality against competitors.
What’s the bottom line? Read our Sony A7 II conclusion.

Succeeded by the Sony A7 III
Compare A7 II vs A7 III
Compare Pentax 645Z vs Sony A7 III

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Differences

Pentax 645Z advantages over Sony A7 II

Larger sensor
Medium format vs 35mm
More sensor area. Bigger is (generally) better.
Higher effective ISO

Higher effective ISO

Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.

Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.

You can learn more at our glossary entry.

Maximum effective ISO test data courtesy of DxO Mark.
645Z test data on DxO Mark A7 II test data on DxO Mark

4,505 vs 2,449 iso
Take photos in low light with less noise
Longer stills battery life
More info

Longer stills battery life

Cameras with longer battery life can take more photos before exhausting their batteries.

Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable

650 vs 350 shots
Capture more photos
Top deck display
Yes vs No
Check settings with a screen on top of the camera
More viewfinder magnification
0.78x vs 0.71x
Get a bigger view of the scene through the eye-level viewfinder
More pixels
51.4 vs 24.3 megapixels
Higher resolution photos
Dual card slots
Yes vs No
Gives you more storage flexibility
Lacks anti-aliasing filter
No Filter vs Filter
Enjoy sharper photos
Higher extended ISO
204800 vs 51200 ISO
Higher extended ISO can give more low-light flexibility

Sony A7 II advantages over Pentax 645Z

Lens selection
Good vs Limited
Better lens selection gives you more options
Less expensive
$1598 vs $4694*
Save money for lenses or accessories
In-Camera Image Stabilization
Yes vs No
Reduces the effects of camera shake at slower shutter speeds
In-camera panoramas
Yes vs No
Stitches multiple shots into a panoramic photo
Built-in Wi-Fi
Wi-Fi vs None
Share your photos wirelessly
NFC
Yes vs No
Simplifies pairing your camera with supported phones
On-sensor phase detect
Yes vs No
Usually improves live view and video AF performance
Thinner
59 mm vs 123 mm
Thinner
Higher max flash sync
1/250 vs 1/125 sec
Reduce the effect of ambient light in flash shots
Headphone jack
Yes vs No
Monitor audio recording while you shoot video
Has anti-aliasing filter
Filter vs No Filter
Reduces unsightly moiré in photos
Faster JPEG shooting
5.0 fps vs 3.1 fps
Faster JPEG shooting (burst mode)
Bigger JPEG buffer
52 vs 12 shots
Take more JPEG shots before waiting (burst mode)
Faster RAW shooting
5.0 fps vs 3.1 fps
Faster RAW shooting in burst mode
Bigger RAW buffer
28 vs 10 shots
Larger buffer for RAW shots (burst mode)
Faster shutter
1/8000 vs 1/4000 sec
Shoot wide open in bright light

Similarities

Common Strengths

Focus peaking
Both provide
Your camera will highlight what's in focus
Eye-level viewfinder
Both provide
You'll be able to frame photos even when the sun is out
Tiltable Screen
Both provide
Tilt the screen for shooting flexbility
External Mic Jack
Both provide
Improved sound fidelity when shooting video
HDMI out
Both provide
Use HDMI output to monitor or review video
Hot shoe
Both provide
Off-camera flashes open new possibilities
Bulb shutter
Both provide
Hold the shutter open manually for long exposures

Common Weaknesses

Tilt-swivel screen
Neither provide
Tilt and swivel the screen for maximum shooting flexibility
Touchscreen
Neither provide
Interact with your camera just like your smartphone
Built-in Bluetooth
Neither provide
Always-on wireless connectivity
Built-in GPS
Neither provide
Geotag your photos
Internal flash
Neither provide
Useful in a pinch for fill flash
Slow-motion videos
Neither provide
Shoot slow-motion videos

User reviews

Amazon
Adorama
Read 645Z User Reviews

Amazon
Adorama
Read A7 II User Reviews

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Body Only
Kit with 28-70mm Lens

All A7 II Deals

Review Excerpt

Phenomenal resolution and detail; Great high ISO performance; Rugged, weather-sealed body; Huge, bright viewfinder; Fast autofocus works well in low light; Swift performance for a medium-format camera; Good battery life; Shoots Full HD video
Quite bulky compared to an APS-C or full-frame DSLR; Autofocus points clustered near center of frame; Most lenses aren't weather-sealed or optimized for digital; Prone to aliasing artifacts (but so are most high-end cameras these days); Attracts a lot of attention from passers-by
Read our Pentax 645Z Review

Excellent 5-axis sensor-shift image stabilization; Sensor-shift IS brings stabilization to nearly any lens; Much-improved ergonomics and top-deck control layout; 'Mark II' maintains same impressive image quality, dynamic range and high ISO performance; XAVC S 50Mbps video format; Faster start-up time; Hybrid AF performs well with good continuous AF.
(Similar to A7): Loud shutter (but electronic first-curtain helps); Battery life could be better; Low-light AF still not as good as most DSLRs; High ISO JPEGs look over-processed; Slow buffer clearing; Limited selection of native Sony FE lenses (but it's getting better).
Read our Sony A7 II Review

The Competition

Compared to Pentax 645D

Pentax 645Z

Pentax 645D

$4845
Medium format

Focus peaking
Tiltable Screen

$3599
Medium format

Fast startup
Longer stills battery life

Compare Pentax 645Z vs Pentax 645D

Sony A7 II

Pentax 645D

$1080
35mm

Lens selection
Focus peaking

$3599
Medium format

Larger sensor
Fast startup

Compare Sony A7 II vs Pentax 645D

Compared to Leica S (Typ 006)

Pentax 645Z

Leica S (Typ 006)

$4845
Medium format

Focus peaking
Tiltable Screen

$10535
Medium format

Thinner
More viewfinder magnification

Compare Pentax 645Z vs Leica S (Typ 006)

Sony A7 II

Leica S (Typ 006)

$1080
35mm

Lens selection
Focus peaking

$10535
Medium format

Larger sensor
Top deck display

Compare Sony A7 II vs Leica S (Typ 006)

Compared to Sony A7

Pentax 645Z

Sony A7

$4845
Medium format

Larger sensor
Fast startup

$748
35mm

Lens selection
Less expensive

Compare Pentax 645Z vs Sony A7

Sony A7 II

Sony A7

$1080
35mm

In-Camera Image Stabilization

$748
35mm

Less expensive

Compare Sony A7 II vs Sony A7

Compared to Leica S-E (Typ 006)

Pentax 645Z

Leica S-E (Typ 006)

$4845
Medium format

Focus peaking
Tiltable Screen

$16900
Medium format

Built-in GPS
Thinner

Compare Pentax 645Z vs Leica S-E (Typ 006)

Sony A7 II

Leica S-E (Typ 006)

$1080
35mm

Lens selection
Focus peaking

$16900
Medium format

Larger sensor
Built-in GPS

Compare Sony A7 II vs Leica S-E (Typ 006)

Compared to Sony A7 III

Pentax 645Z

Sony A7 III

$4845
Medium format

Larger sensor
Higher effective ISO

$1531
35mm

Lens selection
Less expensive

Compare Pentax 645Z vs Sony A7 III

Sony A7 II

Sony A7 III

$1080
35mm

In-camera panoramas

$1531
35mm

Shoot 4K video
Touchscreen

Compare Sony A7 II vs Sony A7 III

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