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Sigma SD9 vs Sony A7

Portability
54
Imaging
39
Features
27
Overall
34
Sigma SD9 front
 
Sony Alpha A7 front
Portability
78
Imaging
70
Features
80
Overall
74

Sigma SD9 vs Sony A7 Key Specs

Sigma SD9
(Full Review)
  • 3MP - APS-C Sensor
  • 1.8" Fixed Screen
  • ISO 100 - 400
  • 1/6000s Maximum Shutter
  • No Video
  • Sigma SA Mount
  • 950g - 152 x 120 x 79mm
  • Revealed November 2002
  • Updated by Sigma SD10
Sony A7
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 50 - 25600
  • 1/8000s Maximum Shutter
  • 1920 x 1080 video
  • Sony E Mount
  • 474g - 127 x 94 x 48mm
  • Introduced January 2014
  • Refreshed by Sony A7 II
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Sigma SD9 vs Sony A7 Overview

On this page, we will be looking at the Sigma SD9 and Sony A7, former is a Advanced DSLR while the latter is a Pro Mirrorless by rivals Sigma and Sony. There is a sizable difference between the resolutions of the SD9 (3MP) and A7 (24MP) and the SD9 (APS-C) and A7 (Full frame) offer different sensor measurements.

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The SD9 was unveiled 12 years before the A7 which is quite a significant difference as far as tech is concerned. Both of these cameras have different body design with the Sigma SD9 being a Mid-size SLR camera and the Sony A7 being a SLR-style mirrorless camera.

Before getting straight to a step-by-step comparison, here is a brief synopsis of how the SD9 matches up against the A7 with regards to portability, imaging, features and an overall score.

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Reasons to pick Sigma SD9 over the Sony A7

 SD9 A7 

Reasons to pick Sony A7 over the Sigma SD9

 A7 SD9 
IntroducedJanuary 2014November 2002More modern by 135 months
Screen typeTiltingFixed Tilting screen
Screen dimensions3"1.8"Bigger screen (+1.2")
Screen resolution1230k130kClearer screen (+1100k dot)

Common features in the Sigma SD9 and Sony A7

 SD9 A7 
Manual focus Very accurate focus
Selfie screen Neither comes with selfie screen
Touch friendly screen Neither comes with Touch friendly screen

Sigma SD9 vs Sony A7 Physical Comparison

In case you're going to carry around your camera often, you'll have to consider its weight and size. The Sigma SD9 comes with outer measurements of 152mm x 120mm x 79mm (6.0" x 4.7" x 3.1") with a weight of 950 grams (2.09 lbs) while the Sony A7 has specifications of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") having a weight of 474 grams (1.04 lbs).

Take a look at the Sigma SD9 and Sony A7 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember that, the weight of an ILC will differ depending on the lens you are utilising during that time. Following is a front view over all size comparison of the SD9 versus the A7.

Sigma SD9 vs Sony A7 size comparison

Taking into consideration size and weight, the portability grade of the SD9 and A7 is 54 and 78 respectively.

Sigma SD9 vs Sony A7 top view buttons comparison

Sigma SD9 vs Sony A7 Sensor Comparison

In many cases, it can be tough to picture the contrast between sensor sizes purely by reading a spec sheet. The picture below should offer you a far better sense of the sensor measurements in the SD9 and A7.

As you can see, both the cameras have different megapixel count and different sensor sizes. The SD9 having a tinier sensor is going to make shooting bokeh trickier and the Sony A7 will deliver extra detail having an extra 21MP. Higher resolution will enable you to crop photographs a bit more aggressively. The more aged SD9 is going to be disadvantaged with regard to sensor technology.

Sigma SD9 vs Sony A7 sensor size comparison

Sigma SD9 vs Sony A7 Screen and ViewFinder

Sigma SD9 vs Sony A7 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Sigma SD9 Portrait photography info
Sony A7 Portrait photography info
47
you can focus manually
decent sensor size (APS-C)
delivers RAW formats
doesn't have liveview
low megapixels (3MP)
82
has manual focus
decent megapixels (24 megapixels)
large sensor size (Full frame)
has face detection focusing
delivers RAW formats
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Street Comparison

Sigma SD9 Street photography features
Sony A7 Street photography features
43
decent sensor size (APS-C)
delivers RAW formats
screen does not articulate
does not have image stabilization
heavier than competition in class (950 grams)
low maximum ISO (400)
79
screen tilts up and down
large sensor size (Full frame)
delivers RAW formats
weather proof
lighter than others (474 grams)
above average ISO range (25,600)
no image stabilization
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Sports Comparison

Sigma SD9 Sports photography highlights
Sony A7 Sports photography highlights
36
high shutter speed (1/6,000s)
decent sensor size (APS-C)
doesn't have liveview
does not have image stabilization
low megapixels (3 megapixels)
has no phase detect autofocus
66
maximum shutter speed is high (1/8,000s)
decent megapixels (24MP)
large sensor size (Full frame)
weather proof
comes with phase detect AF
slow fps (5.0 fps)
no image stabilization
not so great battery life (340 per charge)
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Travel Comparison

Travel photography with Sigma SD9
Travel photography with Sony A7
29
lack of Time Lapse function
heavier than competition in class (950 grams)
low megapixels (3MP)
screen is not selfie friendly
69
lighter than others (474g)
weather proof
decent megapixels (24MP)
not so great battery life (340 per charge)
does not posses selfie friendly screen
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Landscape Comparison

Sigma SD9 as a Landscape photography camera
Sony A7 as a Landscape photography camera
41
you can focus manually
swap lenses (Sigma SA mount)
decent sensor size (APS-C)
delivers RAW formats
small screen (1.8")
doesn't have liveview
does not have image stabilization
low megapixels (3MP)
low maximum ISO (400)
lack of Time Lapse function
75
has manual focus
change lenses (Sony E mount)
screen size is decent (3 inches)
decent megapixels (24MP)
large sensor size (Full frame)
above average ISO range (25,600)
delivers RAW formats
weather proof
no image stabilization
not so great battery life (340 CIPA)
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Vlogging Comparison

Sigma SD9 Vlogging info
Sony A7 Vlogging info
9
can't shoot video
35
has face detection focusing
video res high (1920 x 1080 pxls)
does have external mic socket
lighter than others (474g)
does not posses selfie friendly screen
no image stabilization
Photography Glossary

Sigma SD9 vs Sony A7 Specifications

Detailed spec comparison table for Sigma SD9 and Sony A7
 Sigma SD9Sony Alpha A7
General Information
Manufacturer Sigma Sony
Model type Sigma SD9 Sony Alpha A7
Class Advanced DSLR Pro Mirrorless
Revealed 2002-11-26 2014-01-22
Physical type Mid-size SLR SLR-style mirrorless
Sensor Information
Powered by - Bionz X
Sensor type CMOS (Foveon X3) CMOS
Sensor size APS-C Full frame
Sensor dimensions 20.7 x 13.8mm 35.8 x 23.9mm
Sensor surface area 285.7mm² 855.6mm²
Sensor resolution 3MP 24MP
Anti alias filter
Aspect ratio 3:2 3:2 and 16:9
Max resolution 2268 x 1512 6000 x 4000
Max native ISO 400 25600
Minimum native ISO 100 50
RAW format
Autofocusing
Manual focusing
Touch focus
Continuous autofocus
Autofocus single
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detection focus
Contract detection focus
Phase detection focus
Total focus points - 117
Cross type focus points - 25
Lens
Lens support Sigma SA Sony E
Number of lenses 76 121
Crop factor 1.7 1
Screen
Screen type Fixed Type Tilting
Screen diagonal 1.8 inches 3 inches
Screen resolution 130k dots 1,230k dots
Selfie friendly
Liveview
Touch capability
Screen technology - Xtra Fine LCD
Viewfinder Information
Viewfinder Optical (pentaprism) Electronic
Viewfinder resolution - 2,359k dots
Viewfinder coverage 98 percent 100 percent
Viewfinder magnification 0.77x 0.71x
Features
Minimum shutter speed 30 seconds 30 seconds
Fastest shutter speed 1/6000 seconds 1/8000 seconds
Continuous shutter rate - 5.0fps
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash distance no built-in flash no built-in flash
Flash settings - no built-in flash
External flash
Auto exposure bracketing
White balance bracketing
Fastest flash synchronize 1/180 seconds 1/250 seconds
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions - 1920 x 1080 (60p, 60i, 24p), 1440 x 1080 (30p), 640 x 480 (30p)
Max video resolution None 1920x1080
Video data format - MPEG-4, AVCHD
Mic port
Headphone port
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 1.0 (1.5 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 950 grams (2.09 pounds) 474 grams (1.04 pounds)
Physical dimensions 152 x 120 x 79mm (6.0" x 4.7" x 3.1") 127 x 94 x 48mm (5.0" x 3.7" x 1.9")
DXO scores
DXO Overall rating not tested 90
DXO Color Depth rating not tested 24.8
DXO Dynamic range rating not tested 14.2
DXO Low light rating not tested 2248
Other
Battery life - 340 photos
Form of battery - Battery Pack
Battery ID - NP-FW50
Self timer Yes (10 sec) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse recording With downloadable app
Storage type Compact Flash Type I or II SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Card slots Single Single
Cost at release $3,001 $798