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Pentax K-r vs Sony A100

Portability
67
Imaging
53
Features
52
Overall
52
Pentax K-r front
 
Sony Alpha DSLR-A100 front
Portability
64
Imaging
49
Features
38
Overall
44

Pentax K-r vs Sony A100 Key Specs

Pentax K-r
(Full Review)
  • 12MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 200 - 12800 (Push to 25600)
  • Sensor based Image Stabilization
  • 1/6000s Maximum Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 598g - 125 x 97 x 68mm
  • Launched March 2011
Sony A100
(Full Review)
  • 10MP - APS-C Sensor
  • 2.5" Fixed Display
  • ISO 100 - 1600
  • Sensor based Image Stabilization
  • No Video
  • Sony/Minolta Alpha Mount
  • 638g - 133 x 95 x 71mm
  • Released July 2006
  • Old Model is Konica Minolta 5D
  • Replacement is Sony A550
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Pentax K-r vs Sony A100 Overview

Lets look closer at the Pentax K-r vs Sony A100, both Entry-Level DSLR cameras by companies Pentax and Sony. The sensor resolution of the K-r (12MP) and the A100 (10MP) is fairly close and they possess the exact same sensor sizes (APS-C).

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The K-r was launched 4 years after the A100 which is a fairly large difference as far as camera tech is concerned. Each of these cameras come with the identical body type (Compact SLR).

Before getting in to a comprehensive comparison, below is a brief synopsis of how the K-r matches up versus the A100 in relation to portability, imaging, features and an overall score.

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Reasons to pick Pentax K-r over the Sony A100

 K-r A100 
ReleasedMarch 2011July 2006More modern by 57 months
Display dimension3"2.5"Larger display (+0.5")
Display resolution921k230kCrisper display (+691k dot)

Reasons to pick Sony A100 over the Pentax K-r

 A100 K-r 

Common features in the Pentax K-r and Sony A100

 K-r A100 
Manual focus More precise focusing
Display typeFixed Fixed Fixed display
Selfie screen No selfie screen
Touch display No Touch display

Pentax K-r vs Sony A100 Physical Comparison

When you are looking to carry around your camera frequently, you will need to think about its weight and dimensions. The Pentax K-r comes with exterior dimensions of 125mm x 97mm x 68mm (4.9" x 3.8" x 2.7") accompanied by a weight of 598 grams (1.32 lbs) and the Sony A100 has dimensions of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") and a weight of 638 grams (1.41 lbs).

See the Pentax K-r vs Sony A100 in our completely new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Keep in mind, the weight of an ILC will differ dependant on the lens you are utilising at that time. Underneath is the front view size comparison of the K-r compared to the A100.

Pentax K-r vs Sony A100 size comparison

Using size and weight, the portability grade of the K-r and A100 is 67 and 64 respectively.

Pentax K-r vs Sony A100 top view buttons comparison

Pentax K-r vs Sony A100 Sensor Comparison

Generally, its difficult to envision the gap in sensor sizes purely by looking through specifications. The picture below will help offer you a far better sense of the sensor sizes in the K-r and A100.

To sum up, the 2 cameras have got the exact same sensor measurements but not the same resolution. You can anticipate the Pentax K-r to render extra detail utilizing its extra 2MP. Greater resolution will also let you crop images much more aggressively. The more recent K-r is going to have an advantage in sensor innovation.

Pentax K-r vs Sony A100 sensor size comparison

Pentax K-r vs Sony A100 Screen and ViewFinder

Pentax K-r vs Sony A100 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-r Portrait photography info
Sony A100 Portrait photography info
63
has manual focus
decent sensor size (APS-C)
supports face detection focusing
supports RAW formats
megapixel count low (12MP)
53
manual focus
sensor size is nice (APS-C)
saves RAW files
no liveview
sensor resolution low (10MP)
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Street Comparison

Pentax K-r Street photography highlights
Sony A100 Street photography highlights
67
built in image stabilization (Sensor based)
decent sensor size (APS-C)
supports RAW formats
no moving screen
65
has image stabilization (Sensor based)
sensor size is nice (APS-C)
saves RAW files
screen does not articulate
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Sports Comparison

Pentax K-r Sports photography factors
Sony A100 Sports photography factors
55
great max shutter speed (1/6,000s)
built in image stabilization (Sensor based)
decent sensor size (APS-C)
comes with phase detect AF
slow fps (6.0 frames/s)
megapixel count low (12MP)
bad battery pack (470 per charge)
49
has image stabilization (Sensor based)
sensor size is nice (APS-C)
comes with phase detect AF
no liveview
continuous shooting slow (3.0 frames/s)
sensor resolution low (10 megapixels)
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Travel Comparison

Pentax K-r as a Travel photography camera
Sony A100 as a Travel photography camera
47
flash built-in
bad battery pack (470 CIPA)
megapixel count low (12 megapixels)
does not have selfie friendly screen
45
built-in flash
lack of Timelapse function
sensor resolution low (10 megapixels)
doesn't offer selfie friendly display
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Landscape Comparison

Pentax K-r Landscape photography information
Sony A100 Landscape photography information
65
has manual focus
swap lenses (Pentax KAF2 mount)
pretty good screen size (3")
built in image stabilization (Sensor based)
decent sensor size (APS-C)
supports RAW formats
megapixel count low (12MP)
bad battery pack (470 shots)
53
manual focus
interchangeable lenses (Sony/Minolta Alpha mount)
has image stabilization (Sensor based)
sensor size is nice (APS-C)
saves RAW files
small screen (2.5")
no liveview
sensor resolution low (10 megapixels)
lack of Timelapse function
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Vlogging Comparison

Pentax K-r Vlogging information
Sony A100 Vlogging information
26
built in image stabilization (Sensor based)
supports face detection focusing
does not have selfie friendly screen
low res video (1280 x 720 resolution)
no external mic jack
9
can't record video
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Pentax K-r vs Sony A100 Specifications

Detailed spec comparison table for Pentax K-r and Sony A100
 Pentax K-rSony Alpha DSLR-A100
General Information
Manufacturer Pentax Sony
Model Pentax K-r Sony Alpha DSLR-A100
Category Entry-Level DSLR Entry-Level DSLR
Launched 2011-03-11 2006-07-31
Physical type Compact SLR Compact SLR
Sensor Information
Processor Chip Prime II -
Sensor type CMOS CCD
Sensor size APS-C APS-C
Sensor measurements 23.6 x 15.8mm 23.6 x 15.8mm
Sensor surface area 372.9mm² 372.9mm²
Sensor resolution 12MP 10MP
Anti aliasing filter
Aspect ratio 3:2 3:2
Full resolution 4288 x 2848 3872 x 2592
Max native ISO 12800 1600
Max boosted ISO 25600 -
Min native ISO 200 100
RAW format
Min boosted ISO 100 -
Autofocusing
Focus manually
Touch focus
AF continuous
Single AF
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 11 9
Cross focus points 9 -
Lens
Lens mounting type Pentax KAF2 Sony/Minolta Alpha
Total lenses 151 143
Crop factor 1.5 1.5
Screen
Display type Fixed Type Fixed Type
Display diagonal 3 inch 2.5 inch
Resolution of display 921k dots 230k dots
Selfie friendly
Liveview
Touch screen
Display tech TFT LCD monitor -
Viewfinder Information
Viewfinder Optical (pentamirror) Optical (pentamirror)
Viewfinder coverage 96 percent 95 percent
Viewfinder magnification 0.57x 0.55x
Features
Slowest shutter speed 30 secs 30 secs
Maximum shutter speed 1/6000 secs 1/4000 secs
Continuous shooting rate 6.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Custom WB
Image stabilization
Integrated flash
Flash range 12.00 m (at ISO 100) -
Flash settings Auto, Red-eye Reduction, Slow-speed Sync, Trailing Curtain Sync, High-Speed Sync and Wireless Sync Auto, Fill-in, Red-Eye reduction, Slow Sync, Off
External flash
AE bracketing
WB bracketing
Maximum flash synchronize 1/180 secs 1/160 secs
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions 1280 x 720 (25 fps), 640 x 480 (25 fps) -
Max video resolution 1280x720 None
Video data format Motion JPEG -
Microphone support
Headphone support
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 sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 598g (1.32 lb) 638g (1.41 lb)
Dimensions 125 x 97 x 68mm (4.9" x 3.8" x 2.7") 133 x 95 x 71mm (5.2" x 3.7" x 2.8")
DXO scores
DXO All around score 72 61
DXO Color Depth score 22.9 22.0
DXO Dynamic range score 12.4 11.2
DXO Low light score 755 476
Other
Battery life 470 images -
Style of battery Battery Pack -
Battery model D-LI109,4 x AA NP-FM55H
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec)
Time lapse shooting
Type of storage SD/SDHC Compact Flash (Type I or II)
Card slots 1 1
Retail pricing $1,100 $1,000