Updated (April, 2014): Compare the Sigma SD1 vs Sony SLT A77 II

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Reasons to buy the Sony SLT A77

Viewfinder size
Large viewfinder
0.72x
Image stabilization
Image stabilization
Sensor shift
True resolution
High true resolution
24 MP
Live view
Has live view
Preview your photos
 

Reasons to buy the Sigma SD1

Viewfinder
Great viewfinder
Pentaprism
Built-in flash
Built-in flash
External flash not needed
 
Differences | Recommendations | Cast your vote | Similarities | Competitors | Appearance | Discussion

differences

Advantages of the Sigma SD1

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Viewfinder Has an optical viewfinder Pentaprism vs Digital
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Optical viewfinders save battery life and are more detailed
Thickness Slightly thinner 3.1" vs 3.2"
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Almost the same
Weight Slightly lighter 706 g vs 732 g
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Almost the same
Sigma SD1 Learn more about
the Sigma SD1

Advantages of the Sony SLT A77

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Live view Has live view Yes vs No
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Preview your photos on the camera's screen before taking them
Screen resolution Much higher resolution screen 921k dots vs 460k dots
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More than 2x higher resolution screen
Movie format Shoots movies 1080p @ 60fps vs None
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Shoots Full HD (1080p) video as well as still pictures
Autofocus Video autofocus Phase detection vs None
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Automatically focuses shooting video
Shutter lag Much less shutter lag 124 ms vs 382 ms
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3.1x less delay when taking photos
Startup delay Much less startup delay 3100 ms vs 4500 ms
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More than 30% less delay when turning on
3D Takes 3D photos Yes vs No
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Combines multiple photos into a 3D image
Image stabilization Image stabilization Sensor shift vs None
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Helps eliminate blur caused by small camera movements
Continuous shooting Shoots much faster 12 fps vs 5 fps
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Around 2.5x faster continuous shooting
HDR Has in-camera HDR Yes vs No
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Combines multiple exposures to capture high dynamic range
Panorama Can create panoramas in-camera Yes vs No
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Stitches together multiple photos for a wide perspective
Screen flips out Has a flip-out screen Yes vs No
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Flip-out screens can be helpful when composing tricky shots or taking movies
True resolution Significantly higher true resolution 24 MP vs 15.4 MP
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Capture around 60% more detail in your photos
Viewfinder size Significantly larger viewfinder 0.72x vs 0.62x
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More than 30% larger viewfinder
Lens availability Significantly more lenses available 123 lenses vs 60 lenses
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More than 2x more lenses available
GPS Has a GPS Yes vs No
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Automatically geotags your photos when traveling
Cross type focus points More cross-type focus points 11 vs 2
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Grab focus in difficult situations
Light sensitivity Better maximum light sensitivity 16,000 ISO vs 6,400 ISO
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The SLT A77's maximum light sensitivity is 1.3 f-stops better
Viewfinder coverage Better viewfinder coverage 100% vs 98%
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Almost the same
Focus points More focus points 19 vs 11
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Set focus accurately within the frame
Size Smaller 143x104x81 mm vs 146x113x80 mm
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Around 10% smaller
Sony SLT-A77 Learn more about
the Sony SLT A77
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recommendations

Snapsort can't make a recommendation (yet) because it doesn't have enough data yet about the Sigma SD1.

similarities

Compared to recent DSLRs

Common Strengths Common Weaknesses
Weather sealed Weather sealed Help
Shoot in extreme weather
Fastest shutter speed Fast max shutter speeds Help
1/8000 of a second
Built-in flash Each has a built-in flash Help
External flash not needed
Startup delay Significant startup delay Help
SD1:4500 ms
SLT A77:3100 ms
Thickness Quite thick Help
SD1:3.1"
SLT A77:3.2"
Storage slots Fewer storage slots Help
1
Built-in focus motor No focus motor Help
Won't autofocus with all lenses
Lens availability Few lenses available Help
SD1:60 lenses
SLT A77:123 lenses
Sensor size Very small sensors Help
SD1:APS-C 23.5x15.7mm
SLT A77:APS-C 23.5x15.6mm

dxomark

DXOMark

competitors

Shared Competitors

Advantages

Disadvantages

Nikon D7100

Nikon D7100

Entry-level DSLR

$1,097 body only

$1,394 - $1,397 with 18-140mm lens

Low light performance Is slightly less noisy at high ISO
Overall image quality Has slightly better image quality
Shutter lag Has significantly more shutter lag
Nikon D7000

Nikon D7000

Entry-level DSLR

$1,257 body only

$1,330 with 18-105mm lens

Startup delay Has much less startup delay
Lens availability Much more lenses available
Shutter lag Has significantly more shutter lag
Canon EOS 5D Mark II

Canon EOS 5D Mark II

Pro DSLR

$2,199 - $2,595 body only

$2,889 - $3,650 with 24-105mm lens

Low light performance Is slightly less noisy at high ISO
Startup delay Has much less startup delay
Built-in flash Doesn't have a built-in flash
Weight Is slightly heavier
Sony A7

Sony A7

Mirrorless interchangeable-lens

$1,698 - $2,298 body only

$1,770 - $1,998 with 28-70mm lens

Low light performance Is significantly less noisy at high ISO
Overall image quality Has significantly better image quality
Built-in flash Doesn't have a built-in flash
Lens availability Significantly fewer lenses available
Canon EOS 60D

Canon EOS 60D

Pro DSLR

$699 - $700 body only

$450 - $1,199 with 18-135mm lens

Screen resolution Has a slightly higher resolution screen
Startup delay Has much less startup delay
Viewfinder coverage Slightly less viewfinder coverage
Shutter lag Has significantly more shutter lag
Canon EOS 5D Mark III

Canon EOS 5D Mark III

Pro DSLR

$3,199 - $3,399 body only

$3,799 - $3,999 with 24-105mm lens

Low light performance Is significantly less noisy at high ISO
Screen size Has a significantly larger screen
Built-in flash Doesn't have a built-in flash
Weight Is significantly heavier
Pentax K-3

Pentax K-3

Entry-level DSLR

$930 - $1,247 body only

$1,345 - $1,447 with 18-135mm lens

Low light performance Is slightly less noisy at high ISO
Screen size Has a significantly larger screen
Movie continuous focus Doesn't focus continuously while recording movies

Sigma SD1 Competitors

Advantages

Disadvantages

Nikon D800

Nikon D800

Pro DSLR

$3,160 body only

Startup delay Much less startup delay
Live view Has live view
Continuous shooting Shoots slower
Weight Significantly heavier
Sigma DP2 Quattro

Sigma DP2 Quattro

Boutique

$899 - $999

Screen resolution Much higher resolution screen
True resolution Much higher true resolution
Viewfinder No viewfinder
Autofocus Slower autofocus
Sigma SD15

Sigma SD15

Entry-level DSLR

$929 - $939 body only

Size Slightly smaller
Lowest price Slightly cheaper
Screen resolution Significantly lower resolution screen
True resolution Much lower true resolution
Nikon D600

Nikon D600

Pro DSLR

$1,354 - $1,360 body only

$1,550 with 50mm lens

Startup delay Much less startup delay
Live view Has live view
Fastest shutter speed Much slower max shutter speed
Weight Heavier

Sony SLT-A77 Competitors

Advantages

Disadvantages

Sony SLT A77 II

Sony SLT A77 II

Pro DSLR

$1,048 body only

$1,648 with 16-50mm lens

Focus points Many more focus points
Screen resolution Significantly higher resolution screen
GPS No built-in GPS
Battery life Slightly shorter battery life
Canon EOS 7D

Canon EOS 7D

Pro DSLR

$999 - $1,799 body only

$1,299 - $1,729 with 18-135mm lens

Startup delay Much less startup delay
Viewfinder Has an optical viewfinder
Overall image quality Significantly worse image quality
Color depth Worse color depth
Canon EOS 70D

Canon EOS 70D

Pro DSLR

$1,099 - $1,155 body only

$450 - $1,449 with 18-135mm lens

Startup delay Much less startup delay
Touch screen Has a touch screen
Dynamic range Less dynamic range
Overall image quality Worse image quality
Nikon D5300

Nikon D5300

Entry-level DSLR

$747 body only

$695 - $847 with 18-55mm lens

Startup delay Much less startup delay
Low light performance Lower noise at high ISO
Viewfinder size Much smaller viewfinder
3D Doesn't take 3D photos
Sony SLT-A65

Sony SLT A65

Entry-level DSLR

$749 with 18-55mm lens

Startup delay Less startup delay
Size Smaller
Weather sealed No weather sealing
Overall image quality Worse image quality

appearance

Sigma SD1 Sony SLT-A77
Sigma SD1 Sony SLT-A77
Sony SLT-A77

discussion

Sigma SD1
SD1
Sigma

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Sony SLT-A77
SLT A77
Sony

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