Camera Rocket Review Our evaluation of A37 vs K-r

Image Quality

RAW image quality independent of lens

DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

Focus lag, cross type focus points and focus points

Responsiveness

How much delay is there between you and your photo?

Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

Reviews from dpreview.com, techradar.com, photographyblog.com and reviews.cnet.com

No winner declared

Too close to call

Benchmarks Real world tests of SLT A37 vs Pentax K-r

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

SLT A37
799 ISO
Pentax K-r
755 ISO

Focus lag Delay between fully pressing shutter to image capture

SLT A37
109 ms
Pentax K-r
105 ms

Shutter lag Delay to take a photo when prefocused

SLT A37
57 ms
Pentax K-r
97 ms

Startup delay Delay from power on to first photo

SLT A37
900 ms
Pentax K-r
300 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A37
7 fps
Pentax K-r
6 fps

Battery life How many photos per battery charge (CIPA)

SLT A37
500 photos
Pentax K-r
470 photos

Features Key features of the SLT A37  vs Pentax K-r 

Megapixels Maximum resolution images are captured at

SLT A37
16 MP
Pentax K-r
12.2 MP

Max ISO Maximum light sensitivity of the sensor

SLT A37
25,600 ISO
Pentax K-r
25,600 ISO

Focus points How many different points the camera can focus on

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

Viewfinder size Large viewfinders are brighter and more comfortable to use

SLT A37
0.71x
Pentax K-r
0.56x

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

SLT A37
22.8 microns
Pentax K-r
30.5 microns

Reviews Word on the street

SLT A37  vs Pentax K-r 

10.0
9.0
The Sony A37 can shoot full-resolution 16.1 megapixel pictures at up to 7fps whilst maintaining continuous auto focus and auto exposure, a fast rate for such an inexpensive camera.
SLT A37

Specifications Full list of technical specs

sensor

SLT A37  vs
Pentax K-r 
Type CMOS CMOS
Megapixels 16 MP 12.2 MP
Resolution 4912 x 3264 4288 x 2848
Size APS-C APS-C
Area 23.4 x 15.6 mm 23.6 x 15.8 mm
Crop factor 1.5x 1.5x
Pixel size 22.8 microns 30.5 microns
Light sensitivity 100 ISO to 16,000 ISO 200 ISO to 12,800 ISO
Light sensitivity (Boost) 100 ISO to 25,600 ISO 12,800 ISO to 25,600 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes

focus system

Type Phase detection Phase detection
Focus points 15 11
Cross type focus points 3 9

viewfinder

Viewfinder mirror Opaque Opaque
Viewfinder Yes Yes
Type Electronic Pentamirror
Coverage 100% 96%
Magnification 1.09x 0.85x
Viewfinder size 0.71x 0.56x

performance

Max continuous shooting 7 fps 6 fps
Battery life 500 470
Continuous shooting
6 fps, JPEG
7 fps
5.5 fps
Focus lag 109 ms 105 ms
Shutter lag 57 ms 97 ms
Startup delay 900 ms 300 ms

video

SLT A37  vs
Pentax K-r 
Video 1920 x 1080 @ 29.97 fps 1280 x 720 @ 25 fps
Shoots video in 24p Yes No
Shoots high speed video No No
External mic jack 3.5mm None
Autofocus while shooting video Phase detection Manual
Autofocus type Phase detection N/A
Autofocus supports continuous Yes N/A

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 No
Supports live view Yes Yes

shutter

Min 30 s 30 s
Max 1/4000 s 1/6000 s

form factor

Size 124 x 92 x 85 mm 125 x 97 x 68 mm
Thickness 85 mm 68 mm
Weight 506 g 598 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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Pentax K-r
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