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Nikon D810A vs Pentax K20D

Portability
55
Imaging
75
Features
80
Overall
77
Nikon D810A front
 
Pentax K20D front
Portability
59
Imaging
54
Features
52
Overall
53

Nikon D810A vs Pentax K20D Key Specs

Nikon D810A
(Full Review)
  • 36MP - Full frame Sensor
  • 3.2" Fixed Display
  • ISO 200 - 12800 (Push to 51200)
  • 1/8000s Max Shutter
  • 1920 x 1080 video
  • Nikon F Mount
  • 880g - 146 x 123 x 82mm
  • Announced February 2015
Pentax K20D
(Full Review)
  • 15MP - APS-C Sensor
  • 2.7" Fixed Screen
  • ISO 100 - 3200 (Increase to 6400)
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 800g - 142 x 101 x 70mm
  • Released June 2008
  • Superseded the Pentax K10D
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Nikon D810A vs Pentax K20D Overview

Below is a extended analysis of the Nikon D810A versus Pentax K20D, both Advanced DSLR digital cameras by companies Nikon and Pentax. There is a huge difference between the image resolutions of the D810A (36MP) and K20D (15MP) and the D810A (Full frame) and K20D (APS-C) posses totally different sensor sizing.

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The D810A was announced 6 years later than the K20D and that is quite a significant gap as far as tech is concerned. Each of these cameras feature the same body design (Mid-size SLR).

Before delving straight to a more detailed comparison, here is a quick view of how the D810A matches up vs the K20D for portability, imaging, features and an overall grade.

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Reasons to pick Nikon D810A over the Pentax K20D

 D810A K20D 
ReleasedFebruary 2015June 2008More recent by 81 months
Screen size3.2"2.7"Bigger screen (+0.5")
Screen resolution1229k230kSharper screen (+999k dot)

Reasons to pick Pentax K20D over the Nikon D810A

 K20D D810A 

Common features in the Nikon D810A and Pentax K20D

 D810A K20D 
Focus manually Dial exact focus
Screen typeFixed Fixed Fixed screen
Selfie screen Neither comes with selfie screen
Touch friendly screen Neither comes with Touch friendly screen

Nikon D810A vs Pentax K20D Physical Comparison

For anyone who is intending to lug around your camera often, you will have to consider its weight and size. The Nikon D810A comes with outer measurements of 146mm x 123mm x 82mm (5.7" x 4.8" x 3.2") accompanied by a weight of 880 grams (1.94 lbs) whilst the Pentax K20D has specifications of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs).

Contrast the Nikon D810A versus Pentax K20D 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 differ depending on the lens you have chosen at that moment. Underneath is a front view dimension comparison of the D810A and the K20D.

Nikon D810A vs Pentax K20D size comparison

Considering size and weight, the portability score of the D810A and K20D is 55 and 59 respectively.

Nikon D810A vs Pentax K20D top view buttons comparison

Nikon D810A vs Pentax K20D Sensor Comparison

Oftentimes, it can be tough to see the contrast between sensor measurements just by reviewing specs. The visual below will help provide you a stronger sense of the sensor sizing in the D810A and K20D.

All in all, each of these cameras feature different megapixels and different sensor measurements. The D810A with its bigger sensor will make shooting shallower depth of field simpler and the Nikon D810A will offer greater detail with its extra 21MP. Higher resolution will let you crop pictures way more aggressively. The more modern D810A will have a benefit when it comes to sensor innovation.

Nikon D810A vs Pentax K20D sensor size comparison

Nikon D810A vs Pentax K20D Screen and ViewFinder

Nikon D810A vs Pentax K20D Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Nikon D810A Portrait photography features
Pentax K20D Portrait photography features
85
has manual focus
sensor resolution is fantastic (36 megapixels)
sensor size is great (Full frame)
provides face detection focus
delivers RAW files
72
manual focus
resolution is good (15 megapixels)
sensor size is decent (APS-C)
saves RAW files
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Street Comparison

Nikon D810A Street photography highlights
Pentax K20D Street photography highlights
60
sensor size is great (Full frame)
delivers RAW files
environment proofing
no moving screen
no image stabilization
65
image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW files
environment proofing
screen does not articulate
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Sports Comparison

Nikon D810A Sports photography information
Pentax K20D Sports photography information
76
maximum shutter speed is high (1/8,000s)
sensor resolution is fantastic (36MP)
sensor size is great (Full frame)
provides tracking autofocus
environment proofing
great battery life (1,200 per charge)
sensor has phase detect auto focus
painfully slow continuous shooting (5.0 frames per second)
no image stabilization
68
image stabilization (Sensor based)
resolution is good (15 megapixels)
sensor size is decent (APS-C)
environment proofing
supports phase detect AF
low frames per second (3.0 frames per second)
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Travel Comparison

Travel photography with Nikon D810A
Travel photography with Pentax K20D
69
great battery life (1,200 per charge)
environment proofing
sensor resolution is fantastic (36MP)
flash built-in
screen isn't selfie friendly
64
environment proofing
resolution is good (15 megapixels)
built-in flash
display isn't selfie friendly
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Landscape Comparison

Nikon D810A Landscape photography info
Pentax K20D Landscape photography info
80
has manual focus
swap lenses (Nikon F mount)
screen size is decent (3.2 inch)
sensor resolution is fantastic (36MP)
sensor size is great (Full frame)
delivers RAW files
environment proofing
great battery life (1,200 per charge)
has dual storage slots
no image stabilization
71
manual focus
switch lenses (Pentax KAF2 mount)
image stabilization (Sensor based)
resolution is good (15MP)
sensor size is decent (APS-C)
saves RAW files
environment proofing
small screen (2.7 inches)
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Vlogging Comparison

Vlogging with Nikon D810A
Vlogging with Pentax K20D
30
provides face detection focus
great video quality (1920 x 1080 pxls)
includes external microphone jack
screen isn't selfie friendly
no image stabilization
9
can't shoot video
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Nikon D810A vs Pentax K20D Specifications

Detailed spec comparison table for Nikon D810A and Pentax K20D
 Nikon D810APentax K20D
General Information
Brand Name Nikon Pentax
Model Nikon D810A Pentax K20D
Category Advanced DSLR Advanced DSLR
Announced 2015-02-10 2008-06-25
Physical type Mid-size SLR Mid-size SLR
Sensor Information
Processor Chip EXPEED 4 -
Sensor type CMOS CMOS
Sensor size Full frame APS-C
Sensor dimensions 35.9 x 24mm 23.4 x 15.6mm
Sensor surface area 861.6mm² 365.0mm²
Sensor resolution 36 megapixels 15 megapixels
Anti aliasing filter
Aspect ratio 5:4 and 3:2 3:2
Highest resolution 7360 x 4912 4672 x 3104
Highest native ISO 12800 3200
Highest boosted ISO 51200 6400
Lowest native ISO 200 100
RAW data
Lowest boosted ISO 100 -
Autofocusing
Focus manually
AF touch
Continuous AF
Single AF
AF tracking
AF selectice
Center weighted AF
AF multi area
Live view AF
Face detect focusing
Contract detect focusing
Phase detect focusing
Number of focus points 51 11
Cross focus points 15 -
Lens
Lens mounting type Nikon F Pentax KAF2
Total lenses 309 151
Focal length multiplier 1 1.5
Screen
Type of display Fixed Type Fixed Type
Display sizing 3.2 inches 2.7 inches
Display resolution 1,229k dots 230k dots
Selfie friendly
Liveview
Touch functionality
Viewfinder Information
Viewfinder Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 100 percent 95 percent
Viewfinder magnification 0.7x 0.64x
Features
Slowest shutter speed 30 secs 30 secs
Maximum shutter speed 1/8000 secs 1/4000 secs
Continuous shooting rate 5.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Change WB
Image stabilization
Built-in flash
Flash range 12.00 m (at ISO 100) 13.00 m (at ISO 100)
Flash modes Front-curtain sync, slow sync, rear-curtain sync, redeye reduction, redeye reduction w/slow sync, slow rear-curtain sync Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain, wireless
External flash
Auto exposure bracketing
White balance bracketing
Maximum flash synchronize - 1/180 secs
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (60p, 50p, 30p, 25p, 24p), 1280 x 720 (60p, 50p) -
Highest video resolution 1920x1080 None
Video file format MPEG-4, H.264 -
Mic port
Headphone port
Connectivity
Wireless Optional None
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 880 grams (1.94 pounds) 800 grams (1.76 pounds)
Physical dimensions 146 x 123 x 82mm (5.7" x 4.8" x 3.2") 142 x 101 x 70mm (5.6" x 4.0" x 2.8")
DXO scores
DXO All around score not tested 65
DXO Color Depth score not tested 22.9
DXO Dynamic range score not tested 11.1
DXO Low light score not tested 639
Other
Battery life 1200 photos -
Style of battery Battery Pack -
Battery model EN-EL15 D-LI50
Self timer Yes (2, 5, 10, 20 secs for up to 9 shots) Yes (2 or 10 sec)
Time lapse recording
Storage type SD/SDHC/SDXC, CompactFlash (UDMA compliant) SD/MMC/SDHC card
Card slots Dual 1
Cost at launch $3,800 $700