Clicky

Nikon D3X vs Pentax 645D

Portability
51
Imaging
67
Features
65
Overall
66
Nikon D3X front
 
Pentax 645D front
Portability
50
Imaging
75
Features
52
Overall
65

Nikon D3X vs Pentax 645D Key Specs

Nikon D3X
(Full Review)
  • 25MP - Full frame Sensor
  • 3" Fixed Display
  • ISO 100 - 1600 (Bump to 6400)
  • 1/8000s Max Shutter
  • No Video
  • Nikon F Mount
  • 1260g - 160 x 157 x 88mm
  • Revealed February 2009
  • Previous Model is Nikon D2Xs
Pentax 645D
(Full Review)
  • 40MP - Medium format Sensor
  • 3" Fixed Display
  • ISO 200 - 1600
  • No Anti-Alias Filter
  • No Video
  • Pentax 645AF2 Mount
  • 1480g - 156 x 117 x 119mm
  • Released March 2010
  • Successor is Pentax 645Z
Apple Innovates by Creating Next-Level Optical Stabilization for iPhone

Nikon D3X vs Pentax 645D Overview

In this article, we are analyzing the Nikon D3X vs Pentax 645D, both Pro DSLR cameras by brands Nikon and Pentax. There exists a large gap among the resolutions of the D3X (25MP) and 645D (40MP) and the D3X (Full frame) and 645D (Medium format) enjoy different sensor sizes.

Samsung Releases Faster Versions of EVO MicroSD Cards

The D3X was manufactured 12 months prior to the 645D which means that they are of a similar age. Both of the cameras offer the identical body type (Large SLR).

Before we go through a more detailed comparison, below is a short view of how the D3X grades against the 645D in the way of portability, imaging, features and an overall score.

Photography Glossary
	
	

Reasons to pick Nikon D3X over the Pentax 645D

 D3X 645D 

Reasons to pick Pentax 645D over the Nikon D3X

 645D D3X 
ReleasedMarch 2010February 2009More modern by 12 months
Display resolution921k920kSharper display (+1k dot)

Common features in the Nikon D3X and Pentax 645D

 D3X 645D 
Manually focus Dial exact focusing
Display typeFixed Fixed Fixed display
Display sizing3"3"Equivalent display dimensions
Selfie screen No selfie screen
Touch display No Touch display

Nikon D3X vs Pentax 645D Physical Comparison

If you're going to carry around your camera, you will have to take into account its weight and dimensions. The Nikon D3X has exterior measurements of 160mm x 157mm x 88mm (6.3" x 6.2" x 3.5") with a weight of 1260 grams (2.78 lbs) and the Pentax 645D has dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs).

Look at the Nikon D3X vs Pentax 645D in our brand new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an ILC will differ dependant on the lens you are working with at that moment. Below is the front view over all size comparison of the D3X versus the 645D.

Nikon D3X vs Pentax 645D size comparison

Looking at dimensions and weight, the portability score of the D3X and 645D is 51 and 50 respectively.

Nikon D3X vs Pentax 645D top view buttons comparison

Nikon D3X vs Pentax 645D Sensor Comparison

Quite often, it can be hard to picture the contrast in sensor sizes simply by researching technical specs. The image underneath will give you a stronger sense of the sensor sizing in the D3X and 645D.

As you can tell, the two cameras enjoy different resolutions and different sensor sizes. The D3X because of its smaller sensor is going to make achieving shallow depth of field more challenging and the Pentax 645D will render more detail due to its extra 15MP. Greater resolution can also help you crop images far more aggressively. The more aged D3X will be behind with regard to sensor tech.

Nikon D3X vs Pentax 645D sensor size comparison

Nikon D3X vs Pentax 645D Screen and ViewFinder

Nikon D3X vs Pentax 645D Screen and Viewfinder comparison
Pentax 17 Pre-Orders Outperform Expectations by a Landslide

Photography Type Scores

Portrait Comparison

Nikon D3X as a Portrait photography camera
Pentax 645D as a Portrait photography camera
80
focusing manually
megapixel count fantastic (25 megapixels)
big sensor size (Full frame)
delivers RAW files
77
manual focus
fantastic resolution (40MP)
sensor size is big (Medium format)
supports RAW files
does not have liveview
Sora from OpenAI releases its first ever music video

Street Comparison

Street photography with Nikon D3X
Street photography with Pentax 645D
57
big sensor size (Full frame)
delivers RAW files
weather sealing
no moving screen
does not have image stabilization
58
sensor size is big (Medium format)
supports RAW files
weather proof
screen does not articulate
no image stabilization
Meta to Introduce 'AI-Generated' Labels for Media starting next month

Sports Comparison

Nikon D3X as a Sports photography camera
Pentax 645D as a Sports photography camera
71
high shutter speed (1/8,000 seconds)
megapixel count fantastic (25 megapixels)
big sensor size (Full frame)
weather sealing
good battery life (4,400 CIPA)
comes with phase detect auto focus
slow fps (5.0 frames per second)
does not have image stabilization
62
fantastic resolution (40MP)
sensor size is big (Medium format)
weather proof
supports phase detect auto focus
does not have liveview
max frames per second low (1.0 fps)
no image stabilization
terrible battery pack (800 CIPA)
Photobucket discusses licensing 13 billion images with AI firms

Travel Comparison

Travel photography with Nikon D3X
Travel photography with Pentax 645D
63
good battery life (4,400 per charge)
weather sealing
megapixel count fantastic (25MP)
display isn't selfie friendly
55
weather proof
fantastic resolution (40 megapixels)
terrible battery pack (800 per charge)
does not have selfie friendly display
Japan-exclusive Leica Leitz Phone 3 features big sensor and new modes

Landscape Comparison

Nikon D3X as a Landscape photography camera
Pentax 645D as a Landscape photography camera
76
focusing manually
switch lenses (Nikon F mount)
screen size is good (3 inch)
megapixel count fantastic (25MP)
big sensor size (Full frame)
delivers RAW files
weather sealing
good battery life (4,400 CIPA)
has double storage slots
does not have image stabilization
72
manual focus
switch lenses (Pentax 645AF2 mount)
screen size is good (3")
fantastic resolution (40 megapixels)
sensor size is big (Medium format)
doesnt have low pass filter
supports RAW files
weather proof
has dual storage slots
does not have liveview
no image stabilization
terrible battery pack (800 shots)
President Biden pushes bill mandating TikTok sale or ban

Vlogging Comparison

Nikon D3X Vlogging details
Pentax 645D Vlogging details
9
can't shoot video
9
lack of video recording
Snapchat Adds Watermarks to AI-Created Images

Nikon D3X vs Pentax 645D Specifications

Detailed spec comparison table for Nikon D3X and Pentax 645D
 Nikon D3XPentax 645D
General Information
Manufacturer Nikon Pentax
Model Nikon D3X Pentax 645D
Type Pro DSLR Pro DSLR
Revealed 2009-02-19 2010-03-10
Body design Large SLR Large SLR
Sensor Information
Chip Expeed Prime II
Sensor type CMOS CCD
Sensor size Full frame Medium format
Sensor dimensions 35.9 x 24mm 44 x 33mm
Sensor surface area 861.6mm² 1,452.0mm²
Sensor resolution 25 megapixel 40 megapixel
Anti aliasing filter
Aspect ratio 3:2 4:3
Max resolution 6048 x 4032 7264 x 5440
Max native ISO 1600 1600
Max enhanced ISO 6400 -
Min native ISO 100 200
RAW pictures
Min enhanced ISO 50 100
Autofocusing
Focus manually
Touch focus
AF continuous
AF single
Tracking AF
AF selectice
AF center weighted
Multi area AF
Live view AF
Face detect focusing
Contract detect focusing
Phase detect focusing
Number of focus points 51 11
Lens
Lens mount Nikon F Pentax 645AF2
Amount of lenses 309 6
Crop factor 1 0.8
Screen
Display type Fixed Type Fixed Type
Display diagonal 3 inches 3 inches
Resolution of display 920k dot 921k dot
Selfie friendly
Liveview
Touch functionality
Display technology Super Density TFT color LCD with wide-viewing angle TFT Color LCD with wide-viewing angle and with AR coating
Viewfinder Information
Viewfinder Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 100 percent 98 percent
Viewfinder magnification 0.7x 0.85x
Features
Min shutter speed 30 seconds 30 seconds
Max shutter speed 1/8000 seconds 1/4000 seconds
Continuous shutter speed 5.0fps 1.0fps
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom WB
Image stabilization
Built-in flash
Flash range no built-in flash no built-in flash
Flash modes Auto, On, Off, Red-eye, Slow sync, Rear curtain Auto, On, Off, Red-eye, Slow Sync, Rear Curtain
Hot shoe
AE bracketing
WB bracketing
Max flash sync 1/250 seconds 1/125 seconds
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Max video resolution None None
Mic input
Headphone input
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1260g (2.78 pounds) 1480g (3.26 pounds)
Dimensions 160 x 157 x 88mm (6.3" x 6.2" x 3.5") 156 x 117 x 119mm (6.1" x 4.6" x 4.7")
DXO scores
DXO Overall score 88 82
DXO Color Depth score 24.7 24.6
DXO Dynamic range score 13.7 12.6
DXO Low light score 1992 1262
Other
Battery life 4400 photos 800 photos
Battery format Battery Pack Battery Pack
Battery model EN-EL4a D-LI90
Self timer Yes (2 to 20 sec, custom) Yes (2 or 10 sec)
Time lapse shooting
Storage media Compact Flash (Type I or II) x 2, UDMA SD/SDHC
Storage slots Dual Dual
Pricing at release $3,000 $4,000