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Nikon D810A vs Pentax K-3 III

Portability
55
Imaging
75
Features
80
Overall
77
Nikon D810A front
 
Pentax K-3 Mark III front
Portability
58
Imaging
72
Features
86
Overall
77

Nikon D810A vs Pentax K-3 III Key Specs

Nikon D810A
(Full Review)
  • 36MP - Full frame Sensor
  • 3.2" Fixed Screen
  • ISO 200 - 12800 (Boost to 51200)
  • 1/8000s Maximum Shutter
  • 1920 x 1080 video
  • Nikon F Mount
  • 880g - 146 x 123 x 82mm
  • Introduced February 2015
Pentax K-3 III
(Full Review)
  • 26MP - APS-C Sensor
  • 3.2" Fixed Screen
  • ISO 100 - 1600000
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Maximum Shutter
  • 3840 x 2160 video
  • Pentax KAF2 Mount
  • 820g - 135 x 104 x 74mm
  • Introduced March 2021
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Nikon D810A vs Pentax K-3 III Overview

Here, we will be analyzing the Nikon D810A and Pentax K-3 III, both Advanced DSLR digital cameras by companies Nikon and Pentax. There exists a substantial gap between the resolutions of the D810A (36MP) and K-3 III (26MP) and the D810A (Full frame) and K-3 III (APS-C) boast different sensor sizes.

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The D810A was unveiled 7 years before the K-3 III which is quite a big difference as far as technology is concerned. Both of the cameras feature the same body design (Mid-size SLR).

Before diving straight to a detailed comparison, here is a simple summation of how the D810A matches up against the K-3 III with respect to portability, imaging, features and an overall mark.

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Reasons to pick Nikon D810A over the Pentax K-3 III

 D810A K-3 III 

Reasons to pick Pentax K-3 III over the Nikon D810A

 K-3 III D810A 
IntroducedMarch 2021February 2015Newer by 74 months
Screen resolution1620k1229kSharper screen (+391k dot)
Touch screen Quickly navigate

Common features in the Nikon D810A and Pentax K-3 III

 D810A K-3 III 
Focus manually More precise focus
Screen typeFixed Fixed Fixed screen
Screen size3.2"3.2"Same screen dimensions
Selfie screen Neither offers selfie screen

Nikon D810A vs Pentax K-3 III Physical Comparison

When you are going to travel with your camera, you'll have to factor its weight and proportions. The Nikon D810A offers physical dimensions of 146mm x 123mm x 82mm (5.7" x 4.8" x 3.2") and a weight of 880 grams (1.94 lbs) and the Pentax K-3 III has measurements of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") accompanied by a weight of 820 grams (1.81 lbs).

Examine the Nikon D810A and Pentax K-3 III in our completely new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an ILC will change dependant on the lens you are utilising at that time. Below is a front view measurements comparison of the D810A versus the K-3 III.

Nikon D810A vs Pentax K-3 III size comparison

Using dimensions and weight, the portability rating of the D810A and K-3 III is 55 and 58 respectively.

Nikon D810A vs Pentax K-3 III top view buttons comparison

Nikon D810A vs Pentax K-3 III Sensor Comparison

More often than not, it's difficult to picture the contrast between sensor dimensions only by reviewing specifications. The image below may offer you a clearer sense of the sensor dimensions in the D810A and K-3 III.

Plainly, both of those cameras come with different megapixel count and different sensor dimensions. The D810A using its bigger sensor is going to make achieving bokeh simpler and the Nikon D810A will offer greater detail having an extra 10 Megapixels. Higher resolution will make it easier to crop shots a good deal more aggressively. The more aged D810A is going to be disadvantaged when it comes to sensor technology.

Nikon D810A vs Pentax K-3 III sensor size comparison

Nikon D810A vs Pentax K-3 III Screen and ViewFinder

Nikon D810A vs Pentax K-3 III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Nikon D810A as a Portrait photography camera
Pentax K-3 III as a Portrait photography camera
85
focusing manually
high megapixels (36MP)
sensor size is great (Full frame)
supports face detect focusing
supports RAW formats
83
you can focus manually
great sensor resolution (26MP)
sensor size is nice (APS-C)
includes face detection focus
supports RAW formats
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Street Comparison

Street photography with Nikon D810A
Street photography with Pentax K-3 III
60
sensor size is great (Full frame)
supports RAW formats
weather proof
no moving screen
no image stabilization
71
built in image stabilization (Sensor based)
sensor size is nice (APS-C)
supports RAW formats
comes with focus by touch
environment proof
good ISO range (1,600,000)
no articulating screen
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Sports Comparison

Nikon D810A as a Sports photography camera
Pentax K-3 III as a Sports photography camera
76
maximum shutter speed is high (1/8,000 seconds)
high megapixels (36 megapixels)
sensor size is great (Full frame)
supports tracking focus
weather proof
better than average battery pack (1,200 CIPA)
comes with phase detect AF
slow continuous shooting (5.0 fps)
no image stabilization
79
max shutter speed is good (1/8,000 seconds)
built in image stabilization (Sensor based)
great sensor resolution (26 megapixels)
sensor size is nice (APS-C)
includes tracking autofocus
environment proof
comes with phase detect auto focus
terrible battery pack (800 CIPA)
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Travel Comparison

Nikon D810A as a Travel photography camera
Pentax K-3 III as a Travel photography camera
69
better than average battery pack (1,200 per charge)
weather proof
high megapixels (36 megapixels)
flash built-in
screen is not selfie friendly
64
environment proof
has bluetooth
comes with focus by touch
great sensor resolution (26 megapixels)
terrible battery pack (800 per charge)
screen is not selfie friendly
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Landscape Comparison

Nikon D810A Landscape photography information
Pentax K-3 III Landscape photography information
80
focusing manually
swap lenses (Nikon F mount)
pretty good screen size (3.2")
high megapixels (36MP)
sensor size is great (Full frame)
supports RAW formats
weather proof
better than average battery pack (1,200 per charge)
2 card slots
no image stabilization
80
you can focus manually
change lenses (Pentax KAF2 mount)
screen is a decent size (3.2 inch)
built in image stabilization (Sensor based)
great sensor resolution (26MP)
sensor size is nice (APS-C)
no anti aliasing filter
good ISO range (1,600,000)
supports RAW formats
environment proof
has dual storage slots
terrible battery pack (800 shots)
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Vlogging Comparison

Nikon D810A Vlogging factors
Pentax K-3 III Vlogging factors
30
supports face detect focusing
great video quality (1920 x 1080 resolution)
does have mic support
screen is not selfie friendly
no image stabilization
35
touch screen
built in image stabilization (Sensor based)
includes face detection focus
high res video (3840 x 2160 pixels)
does have external mic jack
screen is not selfie friendly
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Nikon D810A vs Pentax K-3 III Specifications

Detailed spec comparison table for Nikon D810A and Pentax K-3 III
 Nikon D810APentax K-3 Mark III
General Information
Brand Nikon Pentax
Model type Nikon D810A Pentax K-3 Mark III
Type Advanced DSLR Advanced DSLR
Introduced 2015-02-10 2021-03-31
Body design Mid-size SLR Mid-size SLR
Sensor Information
Chip EXPEED 4 -
Sensor type CMOS CMOS
Sensor size Full frame APS-C
Sensor dimensions 35.9 x 24mm 23 x 15.5mm
Sensor surface area 861.6mm² 356.5mm²
Sensor resolution 36 megapixels 26 megapixels
Anti alias filter
Aspect ratio 5:4 and 3:2 3:2
Highest Possible resolution 7360 x 4912 6192 x 4128
Maximum native ISO 12800 1600000
Maximum enhanced ISO 51200 -
Min native ISO 200 100
RAW data
Min enhanced ISO 100 -
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Single autofocus
Autofocus tracking
Autofocus selectice
Center weighted autofocus
Autofocus multi area
Live view autofocus
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Total focus points 51 101
Cross type focus points 15 25
Lens
Lens mount type Nikon F Pentax KAF2
Amount of lenses 309 156
Focal length multiplier 1 1.6
Screen
Range of screen Fixed Type Fixed Type
Screen diagonal 3.2 inch 3.2 inch
Resolution of screen 1,229 thousand dot 1,620 thousand dot
Selfie friendly
Liveview
Touch functionality
Viewfinder Information
Viewfinder Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 100% 100%
Viewfinder magnification 0.7x 0.7x
Features
Min shutter speed 30s 30s
Max shutter speed 1/8000s 1/8000s
Continuous shutter speed 5.0fps 12.0fps
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash distance 12.00 m (at ISO 100) no built-in flash
Flash modes Front-curtain sync, slow sync, rear-curtain sync, redeye reduction, redeye reduction w/slow sync, slow rear-curtain sync Auto, Auto + Red-eye Reduction, Flash On, Flash On + Red-eye Reduction, Slow- speed Sync, Slow-speed Sync + Red-eye, P-TTL, Contrast-control-sync, High-speed sync, Wireless sync
External flash
AE bracketing
WB bracketing
Max flash sync - 1/200s
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions 1920 x 1080 (60p, 50p, 30p, 25p, 24p), 1280 x 720 (60p, 50p) 3840 x 2160 @ 30p, MOV, H.264, Linear PCM3840 x 2160 @ 24p, MOV, H.264, Linear PCM1920 x 1080 @ 60p, MOV, H.264, Linear PCM1920 x 1080 @ 30p, MOV, H.264, Linear PCM1920 x 1080 @ 24p, MOV, H.264, Linear PCM
Maximum video resolution 1920x1080 3840x2160
Video data format MPEG-4, H.264 MPEG-4, H.264
Mic input
Headphone input
Connectivity
Wireless Optional Built-In
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 3.2 Gen 1 (5 GBit/sec)
GPS Optional None
Physical
Environmental seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 880 gr (1.94 lbs) 820 gr (1.81 lbs)
Physical dimensions 146 x 123 x 82mm (5.7" x 4.8" x 3.2") 135 x 104 x 74mm (5.3" x 4.1" x 2.9")
DXO scores
DXO Overall rating not tested not tested
DXO Color Depth rating not tested not tested
DXO Dynamic range rating not tested not tested
DXO Low light rating not tested not tested
Other
Battery life 1200 photos 800 photos
Form of battery Battery Pack Battery Pack
Battery ID EN-EL15 D-LI90
Self timer Yes (2, 5, 10, 20 secs for up to 9 shots) Yes
Time lapse feature
Storage media SD/SDHC/SDXC, CompactFlash (UDMA compliant) Dual SD/SDHC/SDXC slots (UHS-II supported in slot 1)
Storage slots Two Two
Launch pricing $3,800 $1,999