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Pentax K-3 III vs Sigma SD1

Portability
58
Imaging
71
Features
86
Overall
77
Pentax K-3 Mark III front
 
Sigma SD1 front
Portability
77
Imaging
55
Features
43
Overall
50

Pentax K-3 III vs Sigma SD1 Key Specs

Pentax K-3 III
(Full Review)
  • 26MP - APS-C Sensor
  • 3.2" Fixed Display
  • ISO 100 - 1600000
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Pentax KAF2 Mount
  • 820g - 135 x 104 x 74mm
  • Released March 2021
Sigma SD1
(Full Review)
  • 15MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 0 - 0
  • No Video
  • Sigma SA Mount
  • n/ag - 146 x 113 x 80mm
  • Revealed September 2010
  • Successor is Sigma SD1 Merrill
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Pentax K-3 III vs Sigma SD1 Overview

Here, we will be evaluating the Pentax K-3 III versus Sigma SD1, both Advanced DSLR digital cameras by competitors Pentax and Sigma. There is a significant difference between the image resolutions of the K-3 III (26MP) and SD1 (15MP) but both cameras posses the identical sensor dimensions (APS-C).

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The K-3 III was launched 10 years after the SD1 which is quite a sizable gap as far as tech is concerned. Both cameras feature the same body design (Mid-size SLR).

Before diving straight to a detailed comparison, here is a simple highlight of how the K-3 III matches up against the SD1 in terms of portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-3 III over the Sigma SD1

 K-3 III SD1 
RevealedMarch 2021September 2010Newer by 129 months
Screen size3.2"3"Bigger screen (+0.2")
Screen resolution1620k460kCrisper screen (+1160k dot)
Touch screen Quickly navigate

Reasons to pick Sigma SD1 over the Pentax K-3 III

 SD1 K-3 III 

Common features in the Pentax K-3 III and Sigma SD1

 K-3 III SD1 
Focus manually More exact focusing
Screen typeFixed Fixed Fixed screen
Selfie screen Lacking selfie screen

Pentax K-3 III vs Sigma SD1 Physical Comparison

In case you're looking to travel with your camera, you will need to factor its weight and dimensions. The Pentax K-3 III offers exterior measurements of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") along with a weight of 820 grams (1.81 lbs) whilst the Sigma SD1 has dimensions of 146mm x 113mm x 80mm (5.7" x 4.4" x 3.1") accompanied by a weight of n/a grams (0.00 lbs).

Analyze the Pentax K-3 III versus Sigma SD1 in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will differ dependant on the lens you are utilizing at that time. Underneath is a front view dimensions comparison of the K-3 III vs the SD1.

Pentax K-3 III vs Sigma SD1 size comparison

Looking at size and weight, the portability grade of the K-3 III and SD1 is 58 and 77 respectively.

Pentax K-3 III vs Sigma SD1 top view buttons comparison

Pentax K-3 III vs Sigma SD1 Sensor Comparison

Oftentimes, it's difficult to picture the gap between sensor dimensions merely by going over specifications. The pic below should offer you a more clear sense of the sensor sizing in the K-3 III and SD1.

Plainly, both of the cameras come with the identical sensor size albeit different megapixels. You should count on the Pentax K-3 III to offer you extra detail utilizing its extra 11MP. Higher resolution can also help you crop shots a good deal more aggressively. The more modern K-3 III should have a benefit in sensor innovation.

Pentax K-3 III vs Sigma SD1 sensor size comparison

Pentax K-3 III vs Sigma SD1 Screen and ViewFinder

Pentax K-3 III vs Sigma SD1 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-3 III Portrait photography info
Sigma SD1 Portrait photography info
82
you can focus manually
fantastic megapixels (26MP)
good sensor size (APS-C)
has face detection focusing
exports RAW formats
65
has manual focus
good MP (15MP)
sensor size is good (APS-C)
supports RAW formats
doesn't have liveview
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Street Comparison

Pentax K-3 III Street photography information
Sigma SD1 Street photography information
70
built in image stabilization (Sensor based)
good sensor size (APS-C)
exports RAW formats
has focus via touch
environment sealing
above average high ISO (1,600,000)
no articulating screen
62
sensor size is good (APS-C)
supports RAW formats
environment proofing
fixed screen
no image stabilization
low maximum ISO (0)
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Sports Comparison

Pentax K-3 III as a Sports photography camera
Sigma SD1 as a Sports photography camera
79
max shutter speed is good (1/8,000 seconds)
built in image stabilization (Sensor based)
fantastic megapixels (26MP)
good sensor size (APS-C)
has tracking autofocus
environment sealing
has phase detect AF
terrible battery power (800 shots)
56
good MP (15 megapixels)
sensor size is good (APS-C)
environment proofing
supports phase detect AF
doesn't have liveview
slow continuous shooting (5.0 frames/s)
no image stabilization
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Travel Comparison

Pentax K-3 III Travel photography highlights
Sigma SD1 Travel photography highlights
64
environment sealing
supports bluetooth
has focus via touch
fantastic megapixels (26 megapixels)
terrible battery power (800 CIPA)
screen is not selfie friendly
65
environment proofing
good MP (15MP)
has built in flash
missing Time Lapse mode
display is not selfie friendly
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Landscape Comparison

Pentax K-3 III as a Landscape photography camera
Sigma SD1 as a Landscape photography camera
80
you can focus manually
swap lenses (Pentax KAF2 mount)
decent sized screen (3.2 inches)
built in image stabilization (Sensor based)
fantastic megapixels (26 megapixels)
good sensor size (APS-C)
does not have anti aliasing filter
above average high ISO (1,600,000)
exports RAW formats
environment sealing
two card slots
terrible battery power (800 CIPA)
61
has manual focus
switch lenses (Sigma SA mount)
screen size is good (3 inch)
good MP (15 megapixels)
sensor size is good (APS-C)
supports RAW formats
environment proofing
doesn't have liveview
no image stabilization
low maximum ISO (0)
missing Time Lapse mode
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Vlogging Comparison

Pentax K-3 III Vlogging info
Sigma SD1 Vlogging info
35
screen is touchscreen
built in image stabilization (Sensor based)
has face detection focusing
video resolution high (3840 x 2160 resolution)
has external microphone socket
screen is not selfie friendly
9
can't record video
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Pentax K-3 III vs Sigma SD1 Specifications

Detailed spec comparison table for Pentax K-3 III and Sigma SD1
 Pentax K-3 Mark IIISigma SD1
General Information
Brand Name Pentax Sigma
Model type Pentax K-3 Mark III Sigma SD1
Category Advanced DSLR Advanced DSLR
Released 2021-03-31 2010-09-21
Physical type Mid-size SLR Mid-size SLR
Sensor Information
Powered by - Dual True II
Sensor type CMOS CMOS (Foveon X3)
Sensor size APS-C APS-C
Sensor dimensions 23 x 15.5mm 24 x 16mm
Sensor area 356.5mm² 384.0mm²
Sensor resolution 26 megapixels 15 megapixels
Anti alias filter
Aspect ratio 3:2 -
Highest Possible resolution 6192 x 4128 4800 x 3200
Maximum native ISO 1600000 -
Lowest native ISO 100 -
RAW pictures
Autofocusing
Manual focusing
AF touch
AF continuous
AF single
AF tracking
Selective AF
Center weighted AF
Multi area AF
AF live view
Face detect AF
Contract detect AF
Phase detect AF
Total focus points 101 11
Cross type focus points 25 2
Lens
Lens mount type Pentax KAF2 Sigma SA
Number of lenses 156 76
Focal length multiplier 1.6 1.5
Screen
Type of display Fixed Type Fixed Type
Display size 3.2" 3"
Display resolution 1,620 thousand dots 460 thousand dots
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder type Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 100% 96%
Viewfinder magnification 0.7x 0.64x
Features
Min shutter speed 30 seconds 15 seconds
Max shutter speed 1/8000 seconds 1/2000 seconds
Continuous shutter rate 12.0 frames/s 5.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Set WB
Image stabilization
Integrated flash
Flash distance no built-in flash -
Flash options 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 -
Hot shoe
AE bracketing
WB bracketing
Max flash synchronize 1/200 seconds -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 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 3840x2160 None
Video format MPEG-4, H.264 -
Mic support
Headphone support
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 3.2 Gen 1 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 820g (1.81 lb) -
Physical dimensions 135 x 104 x 74mm (5.3" x 4.1" x 2.9") 146 x 113 x 80mm (5.7" x 4.4" x 3.1")
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 800 photos -
Battery style Battery Pack -
Battery ID D-LI90 -
Self timer Yes Yes
Time lapse recording
Storage type Dual SD/SDHC/SDXC slots (UHS-II supported in slot 1) Compact Flash (Type I, UDMA compatible)
Card slots Dual 1
Retail price $1,999 $2,339