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Nikon D3100 vs Pentax K100D S

Portability
68
Imaging
54
Features
59
Overall
56
Nikon D3100 front
 
Pentax K100D Super front
Portability
65
Imaging
45
Features
38
Overall
42

Nikon D3100 vs Pentax K100D S Key Specs

Nikon D3100
(Full Review)
  • 14MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 100 - 3200 (Bump to 12800)
  • 1920 x 1080 video
  • Nikon F Mount
  • 505g - 124 x 96 x 75mm
  • Revealed December 2010
  • Succeeded the Nikon D3000
  • Renewed by Nikon D3200
Pentax K100D S
(Full Review)
  • 6MP - APS-C Sensor
  • 2.5" Fixed Display
  • ISO 200 - 3200
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 646g - 129 x 91 x 71mm
  • Launched June 2007
  • Earlier Model is Pentax K100D
  • Updated by Pentax K200D
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Nikon D3100 vs Pentax K100D S Overview

Below is a comprehensive review of the Nikon D3100 vs Pentax K100D S, both Entry-Level DSLR cameras by brands Nikon and Pentax. There exists a huge gap among the image resolutions of the D3100 (14MP) and K100D S (6MP) but they use the same exact sensor sizing (APS-C).

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The D3100 was launched 3 years later than the K100D S and that is a fairly significant gap as far as camera technology is concerned. Both cameras offer the identical body type (Compact SLR).

Before getting in to a more detailed comparison, below is a short highlight of how the D3100 scores against the K100D S with regard to portability, imaging, features and an overall grade.

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Reasons to pick Nikon D3100 over the Pentax K100D S

 D3100 K100D S 
LaunchedDecember 2010June 2007More recent by 43 months
Display sizing3"2.5"Larger display (+0.5")
Display resolution230k210kClearer display (+20k dot)

Reasons to pick Pentax K100D S over the Nikon D3100

 K100D S D3100 

Common features in the Nikon D3100 and Pentax K100D S

 D3100 K100D S 
Manually focus Dial precise focusing
Display typeFixed Fixed Fixed display
Selfie screen Missing selfie screen
Touch display Missing Touch display

Nikon D3100 vs Pentax K100D S Physical Comparison

If you are going to lug around your camera, you need to think about its weight and proportions. The Nikon D3100 has outer dimensions of 124mm x 96mm x 75mm (4.9" x 3.8" x 3.0") and a weight of 505 grams (1.11 lbs) while the Pentax K100D S has measurements of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") and a weight of 646 grams (1.42 lbs).

Check out the Nikon D3100 vs Pentax K100D S in the new Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will vary dependant on the lens you have attached at that moment. Underneath is the front view measurements comparison of the D3100 against the K100D S.

Nikon D3100 vs Pentax K100D S size comparison

Taking into account dimensions and weight, the portability score of the D3100 and K100D S is 68 and 65 respectively.

Nikon D3100 vs Pentax K100D S top view buttons comparison

Nikon D3100 vs Pentax K100D S Sensor Comparison

Normally, its tough to picture the gap in sensor measurements just by going through specifications. The graphic below should provide you a greater sense of the sensor dimensions in the D3100 and K100D S.

Plainly, both of these cameras offer the same exact sensor sizing but different MP. You should anticipate the Nikon D3100 to show more detail utilizing its extra 8MP. Greater resolution can also allow you to crop pics a little more aggressively. The younger D3100 provides an edge when it comes to sensor innovation.

Nikon D3100 vs Pentax K100D S sensor size comparison

Nikon D3100 vs Pentax K100D S Screen and ViewFinder

Nikon D3100 vs Pentax K100D S Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Nikon D3100 Portrait photography highlights
Pentax K100D S Portrait photography highlights
72
focusing manually
good megapixels (14 megapixels)
sensor size is decent (APS-C)
has face detection focusing
delivers RAW files
51
has manual focus
decent sensor size (APS-C)
saves RAW files
no liveview feature
resolution not great (6MP)
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Street Comparison

Street photography with Nikon D3100
Street photography with Pentax K100D S
58
sensor size is decent (APS-C)
delivers RAW files
screen is fixed
no image stabilization
64
image stabilization (Sensor based)
decent sensor size (APS-C)
saves RAW files
no moving screen
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Sports Comparison

Nikon D3100 as a Sports photography camera
Pentax K100D S as a Sports photography camera
60
good megapixels (14MP)
sensor size is decent (APS-C)
has tracking autofocus
comes with phase detect AF
continuous shooting slow (3.0 frames/s)
no image stabilization
47
image stabilization (Sensor based)
decent sensor size (APS-C)
sensor has phase detect autofocus
no liveview feature
slow frames per second (3.0 frames per second)
resolution not great (6 megapixels)
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Travel Comparison

Nikon D3100 Travel photography factors
Pentax K100D S Travel photography factors
58
good megapixels (14 megapixels)
flash built-in
no Timelapse function
display isn't selfie friendly
45
has built in flash
does not have Timelapse recording
resolution not great (6 megapixels)
doesn't offer selfie friendly display
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Landscape Comparison

Nikon D3100 as a Landscape photography camera
Pentax K100D S as a Landscape photography camera
65
focusing manually
switch lenses (Nikon F mount)
screen is a good size (3 inch)
good megapixels (14MP)
sensor size is decent (APS-C)
delivers RAW files
no image stabilization
no Timelapse function
52
has manual focus
interchangeable lenses (Pentax KAF2 mount)
image stabilization (Sensor based)
decent sensor size (APS-C)
saves RAW files
small screen (2.5")
no liveview feature
resolution not great (6MP)
does not have Timelapse recording
Photography Glossary

Vlogging Comparison

Nikon D3100 Vlogging features
Pentax K100D S Vlogging features
27
has face detection focusing
video res high (1920 x 1080 resolution)
display isn't selfie friendly
no image stabilization
no external microphone socket
9
can't record video
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Nikon D3100 vs Pentax K100D S Specifications

Detailed spec comparison table for Nikon D3100 and Pentax K100D S
 Nikon D3100Pentax K100D Super
General Information
Manufacturer Nikon Pentax
Model Nikon D3100 Pentax K100D Super
Class Entry-Level DSLR Entry-Level DSLR
Revealed 2010-12-21 2007-06-28
Physical type Compact SLR Compact SLR
Sensor Information
Chip Expeed 2 -
Sensor type CMOS CCD
Sensor size APS-C APS-C
Sensor measurements 23.1 x 15.4mm 23.5 x 15.7mm
Sensor surface area 355.7mm² 369.0mm²
Sensor resolution 14 megapixel 6 megapixel
Anti aliasing filter
Aspect ratio 3:2 3:2
Maximum resolution 4608 x 3072 3008 x 2008
Maximum native ISO 3200 3200
Maximum boosted ISO 12800 -
Minimum native ISO 100 200
RAW data
Autofocusing
Focus manually
AF touch
Continuous AF
AF single
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 11 11
Cross focus points 1 -
Lens
Lens mount Nikon F Pentax KAF2
Amount of lenses 309 151
Focal length multiplier 1.6 1.5
Screen
Type of display Fixed Type Fixed Type
Display sizing 3" 2.5"
Display resolution 230k dots 210k dots
Selfie friendly
Liveview
Touch screen
Display tech TFT LCD monitor -
Viewfinder Information
Viewfinder Optical (pentamirror) Optical (pentamirror)
Viewfinder coverage 95 percent 96 percent
Viewfinder magnification 0.53x 0.57x
Features
Slowest shutter speed 30s 30s
Maximum shutter speed 1/4000s 1/4000s
Continuous shooting rate 3.0 frames per sec 3.0 frames per sec
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Set WB
Image stabilization
Built-in flash
Flash range 12.00 m (at ISO 100) -
Flash options Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain Auto, On, Off, Red-eye reduction
External flash
AEB
White balance bracketing
Maximum flash synchronize 1/200s 1/180s
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (24 fps), 1280 x 720 (30, 25, 24 fps), 640 x 424 (24 fps) -
Maximum video resolution 1920x1080 None
Video file format MPEG-4 -
Microphone port
Headphone port
Connectivity
Wireless Eye-Fi Connected None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 505g (1.11 lbs) 646g (1.42 lbs)
Dimensions 124 x 96 x 75mm (4.9" x 3.8" x 3.0") 129 x 91 x 71mm (5.1" x 3.6" x 2.8")
DXO scores
DXO All around score 67 not tested
DXO Color Depth score 22.5 not tested
DXO Dynamic range score 11.3 not tested
DXO Low light score 919 not tested
Other
Battery life 550 images -
Battery type Battery Pack -
Battery model EN-EL14 4 x AA
Self timer Yes Yes (2 or 12 sec)
Time lapse feature
Storage type SD/SDHC/SDXC SD/SDHC card
Card slots One One
Cost at launch $565 $520