Camera Rocket Review Our evaluation of K-3 vs D7100

Image Quality

RAW image quality independent of lens

D7100
9.8
DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

Pentax K-3
10.0
D7100
8.6
Focus lag, cross type focus points and focus points

Responsiveness

How much delay is there between you and your photo?

D7100
9.0
Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

D7100
9.2
Reviews from dpreview.com, 1001noisycameras.com, techradar.com, sonyalpharumors.com and 2 more

No winner declared

Too close to call

Benchmarks Real world tests of Pentax K-3 vs D7100

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

Pentax K-3
1,216 ISO
D7100
1,256 ISO

Focus lag Delay between fully pressing shutter to image capture

Pentax K-3
138 ms
D7100
251 ms

Shutter lag Delay to take a photo when prefocused

Pentax K-3
96 ms
D7100
54 ms

Startup delay Delay from power on to first photo

Pentax K-3
900 ms
D7100
300 ms

Continuous shooting Delay between fully pressing shutter to image capture

Pentax K-3
8.3 fps
D7100
6 fps

Battery life How many photos per battery charge (CIPA)

Pentax K-3
560 photos
D7100
950 photos

Features Key features of the Pentax K-3  vs D7100 

Megapixels Maximum resolution images are captured at

Pentax K-3
24.1 MP
D7100
24 MP

Max ISO Maximum light sensitivity of the sensor

Pentax K-3
51,200 ISO
D7100
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

Pentax K-3
3.2"
D7100
3.2"

Viewfinder size Large viewfinders are brighter and more comfortable to use

Pentax K-3
0.62x
D7100
0.61x

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

Pentax K-3
15.2 microns
D7100
15.3 microns

Reviews Word on the street

Pentax K-3  vs D7100 

8.3
8.5
And the D7100 one-ups its Nikon stablemates with an RGBW rear LCD which offers more efficient operation and gives the option for greater brightness than an RGB panel, making the screen much more usable in direct sunlight.
D7100

Specifications Full list of technical specs

sensor

Pentax K-3  vs
D7100 
Type CMOS CMOS
Megapixels 24.1 MP 24 MP
Resolution 6016 x 4000 6000 x 4000
Size APS-C APS-C
Area 23.5 x 15.6 mm 23.5 x 15.6 mm
Crop factor 1.5x 1.5x
Pixel size 15.2 microns 15.3 microns
Light sensitivity 100 ISO to 51,200 ISO 100 ISO to 6,400 ISO
Light sensitivity (Boost) 100 ISO to 51,200 ISO 6,400 ISO to 25,600 ISO
Codecs
RAW
JPEG
DCF 2.0
Self cleaning sensor Yes Yes

focus system

Type Phase detection Phase detection
Focus points 27 51
Cross type focus points 25 15
Supports continuous No Yes

viewfinder

Viewfinder mirror Opaque Opaque
Viewfinder Yes Yes
Type Pentaprism Pentaprism
Coverage 100% 100%
Magnification 0.95x 0.94x
Viewfinder size 0.62x 0.61x

performance

Max continuous shooting 8.3 fps 6 fps
Battery life 560 950
Continuous shooting
8.3 fps
6 fps
Focus lag 138 ms 251 ms
Shutter lag 96 ms 54 ms
Startup delay 900 ms 300 ms

video

Pentax K-3  vs
D7100 
Video 1920 x 1080 @ 30 fps (MP4, MPEG-4) 1920 x 1080 @ 60 fps
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm 3.5mm
Autofocus while shooting video Contrast detection Contrast detection
Autofocus type Contrast detection Contrast detection
Autofocus supports continuous No Yes

display

Type LCD LCD
Size 3.2" 3.2"
Resolution 1,037 k dots 1,229 k dots
Has a touch screen No No
Has a flip out screen No No
Supports live view Yes Yes

shutter

Min 30 s 30 s
Max 1/8000 s 1/8000 s

form factor

Size 131 x 100 x 77 mm 136 x 107 x 76 mm
Thickness 77 mm 76 mm
Weight 800 g 675 g
Is weather sealed Yes Yes

features

Includes a GPS No No
Supports HDR Yes Yes
WiFi None None
Automatic panorama No No
Create realistic 3D images No No
Image stabilization
Sensor shift
Pentax K-3
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Nikon D7100
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