Compared toThe best recent entry-level DSLRs

Rank Out of Score
Nikon D5100 #10 16 71
Sony SLT-A55 #11 16 71
Nikon D5100 Sony SLT-A55
Score Weight Score Weight
DXO Mark Scores
Low light performance
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1,183 ISO 80.0 x 100.0 = 80.0 816 ISO 45.0 x 100.0 = 45.0
Color depth
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23.5 bits 95.0 x 25.0 = 23.7 23 bits 90.0 x 25.0 = 22.5
Dynamic range
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13 EV 95.0 x 25.0 = 23.7 12.4 EV 85.0 x 25.0 = 21.3
Misc
Cross type focus points
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1 0.0 x 37.5 = 0.0 3 10.0 x 37.5 = 3.8
Shutter lag
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273 ms 35.0 x 37.5 = 13.1 220 ms 55.0 x 37.5 = 20.6
Viewfinder size
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0.51x 20.0 x 37.5 = 7.5 0.72x 100.0 x 37.5 = 37.5
Popularity
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38,152,870 55.0 x 20.0 = 11.0 1,487,015 5.0 x 20.0 = 1.0
Screen
Screen resolution
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920k dots 75.0 x 25.0 = 18.8 921k dots 75.0 x 25.0 = 18.8
Screen size
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3.0" 90.0 x 25.0 = 22.5 3.0" 90.0 x 25.0 = 22.5
Touch screen
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No 0.0 x 12.5 = 0.0 No 0.0 x 12.5 = 0.0
Advanced
Image stabilization
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None 0.0 x 25.0 = 0.0 Sensor shift 80.0 x 25.0 = 20.0
Continuous shooting
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4 fps 30.0 x 12.5 = 3.8 10 fps 85.0 x 12.5 = 10.6
Form factor
Viewfinder
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Pentamirror 75.0 x 25.0 = 18.8 Digital 0.0 x 25.0 = 0.0
Lens availability
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205 lenses 100.0 x 5.0 = 5.0 123 lenses 55.0 x 5.0 = 2.8
Movies
Movie format
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1080p @ 30fps 100.0 x 25.0 = 25.0 1080p @ 30fps 100.0 x 25.0 = 25.0
Total 252.9 Total 251.2
Best total 351.8 Best total 351.8
Nikon D5100 Score 71 Sony SLT-A55 Score 71