Camera Rocket Review Our evaluation of A37 vs D5100

Image Quality

RAW image quality independent of lens

SLT A37
8.8
D5100
9.6
DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

SLT A37
8.6
D5100
6.5
Focus lag, cross type focus points and focus points

Responsiveness

How much delay is there between you and your photo?

SLT A37
9.2
D5100
8.2
Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

SLT A37
9.4
D5100
9.1
Reviews from dpreview.com, techradar.com, photographyblog.com and reviews.cnet.com

Camera Rocket Score

Image Quality, Focusing, Responsiveness and Reviews

SLT A37
9.1
D5100
8.9

Winner
Sony SLT A37 

Camera Rocket recommends the Sony SLT A37  based on its focusing, responsiveness and reviews.

See full details

Benchmarks Real world tests of SLT A37 vs D5100

Low light image quality Highest ISO setting that still achieves great image quality

SLT A37
799 ISO
D5100
1,183 ISO

Focus lag Delay between fully pressing shutter to image capture

SLT A37
109 ms
D5100
273 ms

Shutter lag Delay to take a photo when prefocused

SLT A37
57 ms
D5100
114 ms

Startup delay Delay from power on to first photo

SLT A37
900 ms
D5100
500 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A37
7 fps
D5100
4 fps

Battery life How many photos per battery charge (CIPA)

SLT A37
500 photos
D5100
660 photos

Features Key features of the SLT A37  vs D5100 

Megapixels Maximum resolution images are captured at

SLT A37
16 MP
D5100
16.1 MP

Max ISO Maximum light sensitivity of the sensor

SLT A37
25,600 ISO
D5100
25,600 ISO

Focus points How many different points the camera can focus on

SLT A37
15
D5100
11

Screen size Larger screens make it easier to preview and review photos

SLT A37
2.6"
D5100
3"

Viewfinder size Large viewfinders are brighter and more comfortable to use

SLT A37
0.71x
D5100
0.51x

Pixel size How much area of the sensor is dedicated to each pixel

SLT A37
22.8 microns
D5100
22.9 microns

Reviews Word on the street

SLT A37  vs D5100 

10.0
9.0
As with Live View, continuous phase-detection AF is possible whilst shooting movies on the A37, a distinct advantage over most DSLR cameras and fast enough to rival Compact System Cameras like the Panasonic Lumix GH series.
SLT A37

7.3
7.7
Despite the higher-resolution sensor, the D5100 delivers visibly better image quality at all ISO sensitivities than the D5000, although the D5000 has slightly better white balance.
D5100

Overall

8.8 Out of 10
8.2 Out of 10

Specifications Full list of technical specs

sensor

SLT A37  vs
D5100 
Type CMOS CMOS
Megapixels 16 MP 16.1 MP
Resolution 4912 x 3264 4928 x 3264
Size APS-C APS-C
Area 23.4 x 15.6 mm 23.6 x 15.6 mm
Crop factor 1.5x 1.5x
Pixel size 22.8 microns 22.9 microns
Light sensitivity 100 ISO to 16,000 ISO 100 ISO to 6,400 ISO
Light sensitivity (Boost) 100 ISO to 25,600 ISO 6,400 ISO to 25,600 ISO
Codecs
RAW
JPEG
NEF 14bit
Self cleaning sensor Yes Yes

focus system

Type Phase detection Phase detection
Focus points 15 11
Cross type focus points 3 1

viewfinder

Viewfinder mirror Opaque Opaque
Viewfinder Yes Yes
Type Electronic Pentamirror
Coverage 100% 95%
Magnification 1.09x 0.78x
Viewfinder size 0.71x 0.51x

performance

Max continuous shooting 7 fps 4 fps
Battery life 500 660
Continuous shooting
4 fps, JPEG
7 fps
5.5 fps
Focus lag 109 ms 273 ms
Shutter lag 57 ms 114 ms
Startup delay 900 ms 500 ms

video

SLT A37  vs
D5100 
Video 1920 x 1080 @ 29.97 fps 1920 x 1080 @ 30 fps
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm 3.5mm
Autofocus while shooting video Phase detection Contrast detection
Autofocus type Phase detection Contrast detection
Autofocus supports continuous Yes Yes

display

Type LCD LCD
Size 2.6" 3"
Resolution 230 k dots 920 k dots
Has a touch screen No No
Has a flip out screen Yes Yes
Supports live view Yes Yes

shutter

Min 30 s 30 s
Max 1/4000 s 1/4000 s

form factor

Size 124 x 92 x 85 mm 127 x 96.5 x 78.7 mm
Thickness 85 mm 78.7 mm
Weight 506 g 560 g
Is weather sealed No No

features

Is a smart camera No No
Includes a GPS No No
Supports HDR Yes Yes
Automatic panorama Yes No
Create realistic 3D images Yes No
Image stabilization
Sensor shift
Sony SLT A37
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Nikon D5100
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