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Sigma SD15 vs Sony A850

Portability
59
Imaging
44
Features
45
Overall
44
Sigma SD15 front
 
Sony Alpha DSLR-A850 front
Portability
54
Imaging
68
Features
60
Overall
64

Sigma SD15 vs Sony A850 Key Specs

Sigma SD15
(Full Review)
  • 5MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 100 - 1600 (Expand to 3200)
  • No Video
  • Sigma SA Mount
  • 750g - 144 x 107 x 81mm
  • Launched February 2010
  • Older Model is Sigma SD14
Sony A850
(Full Review)
  • 25MP - Full frame Sensor
  • 3" Fixed Display
  • ISO 200 - 3200 (Increase to 6400)
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • No Video
  • Sony/Minolta Alpha Mount
  • 895g - 156 x 117 x 82mm
  • Launched April 2010
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Sigma SD15 vs Sony A850 Overview

Here, we are evaluating the Sigma SD15 versus Sony A850, both Advanced DSLR digital cameras by brands Sigma and Sony. There exists a sizable gap between the sensor resolutions of the SD15 (5MP) and A850 (25MP) and the SD15 (APS-C) and A850 (Full frame) offer totally different sensor dimensions.

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The SD15 was brought out within a month of the A850 and they are both of a similar age. Both of these cameras feature the same body design (Mid-size SLR).

Before getting right into a complete comparison, here is a short highlight of how the SD15 grades versus the A850 in regards to portability, imaging, features and an overall grade.

Photography Glossary
	
	

Reasons to pick Sigma SD15 over the Sony A850

 SD15 A850 

Reasons to pick Sony A850 over the Sigma SD15

 A850 SD15 
Display resolution922k460kCrisper display (+462k dot)

Common features in the Sigma SD15 and Sony A850

 SD15 A850 
LaunchedFebruary 2010April 2010Similar age
Manually focus Dial exact focusing
Display typeFixed Fixed Fixed display
Display size3"3"Same display sizing
Selfie screen Absent selfie screen
Touch display Absent Touch display

Sigma SD15 vs Sony A850 Physical Comparison

In case you're looking to lug around your camera often, you will want to factor in its weight and size. The Sigma SD15 enjoys external 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) while the Sony A850 has specifications of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") having a weight of 895 grams (1.97 lbs).

Examine the Sigma SD15 versus Sony A850 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Don't forget, the weight of an ILC will vary based on the lens you are utilising at that time. The following is a front view overall size comparison of the SD15 vs the A850.

Sigma SD15 vs Sony A850 size comparison

Considering dimensions and weight, the portability score of the SD15 and A850 is 59 and 54 respectively.

Sigma SD15 vs Sony A850 top view buttons comparison

Sigma SD15 vs Sony A850 Sensor Comparison

Quite often, it is very difficult to envision the gap between sensor measurements only by looking at technical specs. The photograph here will offer you a much better sense of the sensor measurements in the SD15 and A850.

As you have seen, both of the cameras come with different megapixels and different sensor measurements. The SD15 featuring a tinier sensor will make achieving bokeh more challenging and the Sony A850 will give extra detail having its extra 20MP. Greater resolution will also allow you to crop photos a good deal more aggressively.

Sigma SD15 vs Sony A850 sensor size comparison

Sigma SD15 vs Sony A850 Screen and ViewFinder

Sigma SD15 vs Sony A850 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Sigma SD15
Portrait photography with Sony A850
50
has manual focus
decent sensor size (APS-C)
exports RAW files
no liveview
low MP (5 megapixels)
72
you can focus manually
megapixel count excellent (25 megapixels)
large sensor size (Full frame)
saves RAW formats
does not have liveview
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Street Comparison

Sigma SD15 as a Street photography camera
Sony A850 as a Street photography camera
52
decent sensor size (APS-C)
exports RAW files
screen does not articulate
no image stabilization
66
image stabilization (Sensor based)
large sensor size (Full frame)
saves RAW formats
weather sealing
screen does not articulate
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Sports Comparison

Sigma SD15 Sports photography information
Sony A850 Sports photography information
38
decent sensor size (APS-C)
comes with phase detect autofocus
no liveview
max fps low (3.0 fps)
no image stabilization
low MP (5 megapixels)
71
maximum shutter speed is high (1/8,000 seconds)
image stabilization (Sensor based)
megapixel count excellent (25 megapixels)
large sensor size (Full frame)
weather sealing
sensor has phase detect AF
does not have liveview
max frames per second very slow (3.0 frames per second)
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Travel Comparison

Travel photography with Sigma SD15
Travel photography with Sony A850
42
built-in flash
missing Timelapse function
low MP (5MP)
doesn't contain selfie friendly display
55
weather sealing
megapixel count excellent (25MP)
missing Timelapse function
doesn't contain selfie friendly display
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Landscape Comparison

Sigma SD15 Landscape photography details
Sony A850 Landscape photography details
51
has manual focus
switch lenses (Sigma SA mount)
screen is a good size (3 inches)
decent sensor size (APS-C)
exports RAW files
no liveview
no image stabilization
low MP (5 megapixels)
missing Timelapse function
73
you can focus manually
switch lenses (Sony/Minolta Alpha mount)
screen is a good size (3 inches)
image stabilization (Sensor based)
megapixel count excellent (25MP)
large sensor size (Full frame)
saves RAW formats
weather sealing
has double storage slots
does not have liveview
missing Timelapse function
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Vlogging Comparison

Sigma SD15 Vlogging advice
Sony A850 Vlogging advice
9
can't shoot video
9
no video shooting
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Sigma SD15 vs Sony A850 Specifications

Detailed spec comparison table for Sigma SD15 and Sony A850
 Sigma SD15Sony Alpha DSLR-A850
General Information
Make Sigma Sony
Model type Sigma SD15 Sony Alpha DSLR-A850
Type Advanced DSLR Advanced DSLR
Launched 2010-02-20 2010-04-15
Body design Mid-size SLR Mid-size SLR
Sensor Information
Processor Chip True II Bionz
Sensor type CMOS (Foveon X3) CMOS
Sensor size APS-C Full frame
Sensor measurements 20.7 x 13.8mm 35.9 x 24mm
Sensor surface area 285.7mm² 861.6mm²
Sensor resolution 5 megapixels 25 megapixels
Anti alias filter
Aspect ratio 3:2 3:2 and 16:9
Highest resolution 2640 x 1760 6048 x 4032
Highest native ISO 1600 3200
Highest boosted ISO 3200 6400
Minimum native ISO 100 200
RAW data
Minimum boosted ISO 50 -
Autofocusing
Manual focusing
Autofocus touch
Autofocus continuous
Single autofocus
Autofocus tracking
Autofocus selectice
Center weighted autofocus
Multi area autofocus
Live view autofocus
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Total focus points - 9
Lens
Lens support Sigma SA Sony/Minolta Alpha
Total lenses 76 143
Crop factor 1.7 1
Screen
Range of display Fixed Type Fixed Type
Display diagonal 3 inch 3 inch
Resolution of display 460k dot 922k dot
Selfie friendly
Liveview
Touch operation
Display tech - TFT Xtra Fine color LCD
Viewfinder Information
Viewfinder type Optical (pentaprism) Optical (pentaprism)
Viewfinder coverage 96 percent 98 percent
Viewfinder magnification 0.6x 0.74x
Features
Slowest shutter speed 30s 30s
Maximum shutter speed 1/4000s 1/8000s
Continuous shooting speed 3.0fps 3.0fps
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change white balance
Image stabilization
Integrated flash
Flash distance - no built-in flash
Flash settings - Auto, On, Off, Red-Eye, Slow Sync, Rear Curtain, Fill-in, Wireless
Hot shoe
AE bracketing
WB bracketing
Maximum flash sync 1/180s 1/250s
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Highest video resolution None None
Microphone jack
Headphone jack
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 750 grams (1.65 lbs) 895 grams (1.97 lbs)
Physical dimensions 144 x 107 x 81mm (5.7" x 4.2" x 3.2") 156 x 117 x 82mm (6.1" x 4.6" x 3.2")
DXO scores
DXO All around rating not tested 79
DXO Color Depth rating not tested 23.8
DXO Dynamic range rating not tested 12.2
DXO Low light rating not tested 1415
Other
Battery life - 880 photos
Battery form - Battery Pack
Battery ID - NP-FM500H
Self timer Yes (10 sec) Yes (2 or 10 sec)
Time lapse recording
Storage media SD/SDHC card Compact Flash (Type I or II), UDMA, Memory Stick Duo / Pro Duo
Storage slots One 2
Pricing at launch $1,500 $0