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Pentax K-7 vs Sigma SD15

Portability
60
Imaging
55
Features
69
Overall
60
Pentax K-7 front
 
Sigma SD15 front
Portability
59
Imaging
44
Features
45
Overall
44

Pentax K-7 vs Sigma SD15 Key Specs

Pentax K-7
(Full Review)
  • 15MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 100 - 2000 (Boost to 6400)
  • Sensor based Image Stabilization
  • 1/8000s Max Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 750g - 131 x 97 x 73mm
  • Released October 2009
  • Replacement is Pentax K-5
Sigma SD15
(Full Review)
  • 5MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 100 - 1600 (Increase to 3200)
  • No Video
  • Sigma SA Mount
  • 750g - 144 x 107 x 81mm
  • Announced February 2010
  • Superseded the Sigma SD14
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Pentax K-7 vs Sigma SD15 Overview

Here is a detailed assessment of the Pentax K-7 versus Sigma SD15, both Advanced DSLR digital cameras by companies Pentax and Sigma. There is a sizeable difference between the image resolutions of the K-7 (15MP) and SD15 (5MP) but both cameras have the same sensor size (APS-C).

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The K-7 was brought out 4 months before the SD15 so they are both of a similar generation. Both the cameras have the same body design (Mid-size SLR).

Before we go right into a in depth comparison, here is a concise synopsis of how the K-7 matches up versus the SD15 in the way of portability, imaging, features and an overall rating.

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Reasons to pick Pentax K-7 over the Sigma SD15

 K-7 SD15 
Display resolution921k460kSharper display (+461k dot)

Reasons to pick Sigma SD15 over the Pentax K-7

 SD15 K-7 

Common features in the Pentax K-7 and Sigma SD15

 K-7 SD15 
AnnouncedOctober 2009February 2010Similar generation
Manual focus Dial accurate focusing
Display typeFixed Fixed Fixed display
Display dimensions3"3"Equal display size
Selfie screen Neither contains selfie screen
Touch friendly display Neither contains Touch friendly display

Pentax K-7 vs Sigma SD15 Physical Comparison

In case you're going to carry your camera frequently, you will want to take into account its weight and proportions. The Pentax K-7 has got outside dimensions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") along with a weight of 750 grams (1.65 lbs) while the Sigma SD15 has measurements of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") accompanied by a weight of 750 grams (1.65 lbs).

Look at the Pentax K-7 versus Sigma SD15 in the all new Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an Interchangeable Lens Camera will change depending on the lens you choose at the time. Following is a front view overall size comparison of the K-7 compared to the SD15.

Pentax K-7 vs Sigma SD15 size comparison

Considering size and weight, the portability rating of the K-7 and SD15 is 60 and 59 respectively.

Pentax K-7 vs Sigma SD15 top view buttons comparison

Pentax K-7 vs Sigma SD15 Sensor Comparison

Often, its hard to imagine the contrast between sensor sizing only by reading through a spec sheet. The visual underneath will help offer you a clearer sense of the sensor dimensions in the K-7 and SD15.

Clearly, both the cameras have the same sensor dimensions but different MP. You should anticipate the Pentax K-7 to resolve greater detail having its extra 10 Megapixels. Greater resolution will also enable you to crop photos a bit more aggressively.

Pentax K-7 vs Sigma SD15 sensor size comparison

Pentax K-7 vs Sigma SD15 Screen and ViewFinder

Pentax K-7 vs Sigma SD15 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-7 Portrait photography factors
Sigma SD15 Portrait photography factors
73
focusing manually
good megapixels (15MP)
sensor size is good (APS-C)
features face detect focus
supports RAW formats
50
has manual focus
sensor size is good (APS-C)
saves RAW formats
doesn't have liveview
low MP (5MP)
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Street Comparison

Street photography with Pentax K-7
Street photography with Sigma SD15
66
built in image stabilization (Sensor based)
sensor size is good (APS-C)
supports RAW formats
weather sealing
fixed screen
52
sensor size is good (APS-C)
saves RAW formats
no moving screen
no image stabilization
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Sports Comparison

Pentax K-7 Sports photography info
Sigma SD15 Sports photography info
70
max shutter speed is good (1/8,000s)
built in image stabilization (Sensor based)
good megapixels (15MP)
sensor size is good (APS-C)
weather sealing
supports phase detect auto focus
max frames per second very slow (5.0 fps)
38
sensor size is good (APS-C)
sensor has phase detect AF
doesn't have liveview
max frames per second very slow (3.0 fps)
no image stabilization
low MP (5 megapixels)
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Travel Comparison

Pentax K-7 Travel photography features
Sigma SD15 Travel photography features
65
weather sealing
good megapixels (15MP)
has built in flash
does not posses selfie friendly display
42
built-in flash
doesn't have Time Lapse function
low MP (5 megapixels)
doesn't have selfie friendly screen
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Landscape Comparison

Pentax K-7 as a Landscape photography camera
Sigma SD15 as a Landscape photography camera
78
focusing manually
interchangeable lenses (Pentax KAF2 mount)
screen size is good (3 inch)
built in image stabilization (Sensor based)
good megapixels (15MP)
sensor size is good (APS-C)
supports RAW formats
weather sealing
51
has manual focus
swap lenses (Sigma SA mount)
screen is a decent size (3 inches)
sensor size is good (APS-C)
saves RAW formats
doesn't have liveview
no image stabilization
low MP (5 megapixels)
doesn't have Time Lapse function
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Vlogging Comparison

Pentax K-7 Vlogging factors
Sigma SD15 Vlogging factors
25
built in image stabilization (Sensor based)
features face detect focus
does not posses selfie friendly display
low video resolution (1280 x 720 pixels)
lack of microphone socket
9
no video
Photography Glossary

Pentax K-7 vs Sigma SD15 Specifications

Detailed spec comparison table for Pentax K-7 and Sigma SD15
 Pentax K-7Sigma SD15
General Information
Brand Name Pentax Sigma
Model type Pentax K-7 Sigma SD15
Class Advanced DSLR Advanced DSLR
Released 2009-10-02 2010-02-20
Body design Mid-size SLR Mid-size SLR
Sensor Information
Chip Prime II True II
Sensor type CMOS CMOS (Foveon X3)
Sensor size APS-C APS-C
Sensor dimensions 23.4 x 15.6mm 20.7 x 13.8mm
Sensor area 365.0mm² 285.7mm²
Sensor resolution 15MP 5MP
Anti alias filter
Aspect ratio 3:2 3:2
Highest resolution 4672 x 3104 2640 x 1760
Highest native ISO 2000 1600
Highest boosted ISO 6400 3200
Lowest native ISO 100 100
RAW pictures
Lowest boosted ISO - 50
Autofocusing
Focus manually
Autofocus touch
Autofocus continuous
Autofocus single
Tracking autofocus
Autofocus selectice
Autofocus center weighted
Multi area autofocus
Live view autofocus
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 11 -
Lens
Lens mount type Pentax KAF2 Sigma SA
Amount of lenses 151 76
Focal length multiplier 1.5 1.7
Screen
Screen type Fixed Type Fixed Type
Screen size 3 inch 3 inch
Resolution of screen 921 thousand dot 460 thousand dot
Selfie friendly
Liveview
Touch function
Screen technology TFT color LCD with AR coating -
Viewfinder Information
Viewfinder Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 100% 96%
Viewfinder magnification 0.61x 0.6x
Features
Slowest shutter speed 30 secs 30 secs
Maximum shutter speed 1/8000 secs 1/4000 secs
Continuous shooting speed 5.0 frames per sec 3.0 frames per sec
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Custom white balance
Image stabilization
Integrated flash
Flash distance 13.00 m -
Flash options Auto, On, Off, Red-eye, Slow Sync, Rear Curtain, Wireless -
Hot shoe
Auto exposure bracketing
WB bracketing
Maximum flash sync 1/180 secs 1/180 secs
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions 1280 x 720 (30 fps), 1536 x 1024 (30 fps), 640 x 480 (30 fps), 320 x 240 (30 fps) -
Highest video resolution 1280x720 None
Video data format Motion JPEG -
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 None None
Physical
Environmental seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 750g (1.65 pounds) 750g (1.65 pounds)
Physical dimensions 131 x 97 x 73mm (5.2" x 3.8" x 2.9") 144 x 107 x 81mm (5.7" x 4.2" x 3.2")
DXO scores
DXO All around rating 61 not tested
DXO Color Depth rating 22.6 not tested
DXO Dynamic range rating 10.6 not tested
DXO Low light rating 536 not tested
Other
Battery life 980 photos -
Style of battery Battery Pack -
Battery ID D-LI90 -
Self timer Yes (2 or 10 sec) Yes (10 sec)
Time lapse recording
Type of storage SD/SDHC/MMC SD/SDHC card
Storage slots Single Single
Launch price $599 $1,500