Nikon D7100 vs Pentax K-3 Mark III

General	Nikon D7100	Pentax K-3 Mark III
Brand	Nikon	Pentax
Model	D7100	K-3 Mark III
Predecessor Model	Nikon D7000	Pentax K-3 Mark II
Successor Model	Nikon D7200
MSRP	Body only: $1199.95/£1099.99/€1179, With 18-105mm F3.5-5.6 VR lens : $1,599/£1,299/€1399	$1999 (body only)
Camera Type	Interchangeable Lens	Interchangeable Lens
Body Type	DSLR	DSLR
Video Capture

Sensor	Nikon D7100	Pentax K-3 Mark III
Sensor Type	CMOS	CMOS
Sensor Format	DX
Sensor Size	APS-C	APS-C
Sensor Dimensions	23.5 x 15.6 mm	23.3 x 15.5 mm
Total Pixels	24.71 Megapixel	26.78 Megapixel
Effective Pixels	24.1 Megapixel	25.73 Megapixel
Low Pass Filter
Native ISO Range	100 - 6,400	100 - 1,600,000
Boosted ISO Range	100 - 25,600
Sensor Shift High Resolution Mode

Photo	Nikon D7100	Pentax K-3 Mark III
Processor		PRIME V
Max Image Resolution	6000 x 4000	6192 x 4128
Other Resolutions	6000 x 3368, 4800 x 3200, 4800 x 2696, 4494 x 3000, 4496 x 2528, 3600 x 2400, 3600 x 2024, 2992 x 2000, 2992 x 1680, 2400 x 1600, 2400 x 1344
Image Aspect Ratios	3:2, 16:9	3:2
Image File Format	JPEG, RAW	DNG, JPEG, RAW
JPEG Quality Levels		Best, better, good
Bit Depth	14-Bit	14-Bit
Color Space		sRGB, Adobe RGB
Timelapse Recording
White Balance		Presets: Auto, CTE, Cloudy, Color Temperature, Daylight, Fluorescent (Cool White), Fluorescent (Day White), Fluorescent (Daylight), Fluorescent (Warm White), Manual, Multi Auto WB, Shade, Tungsten
WB Bracketing	2 to 5 frames in steps of 1, 2 or 3
Active D-Lighting	Can be selected from: Auto Extra High High Normal Low Off
Active D-Lighting Bracketing	2 frames using selected value for one frame or 3 frames using preset values for all frames

Focus	Nikon D7100	Pentax K-3 Mark III
Autofocus Modes	Multi-area Center Selective single-point Tracking Single Continuous Face Detection Live View	Multi-area Center Selective single-point Tracking Single Continuous Touch Face Detection Live View
Lens Servo	Continuous-Servo AF, Focus Lock AF Area Mode, Manual Focus, Single-Servo AF	Continuous-Servo AF, Manual Focus, Single-Servo AF
AF Detection Range	-2 to +19 EV	-4 to +18 EV
Number of Focus Points	51	101
Number of Cross-type Focus Points	15	25
Touch-to-Focus
Live View Autofocus
Animal Eye Detection
Vehicle Tracking Mode
Insect Tracking Mode
Contrast Detection for Autofocus
Phase Detection for Autofocus
Focusing Screen	Type B BriteView Clear Matte Mark II screen	Natural-Bright-Matte III focusing screen

Optics	Nikon D7100	Pentax K-3 Mark III
Lens Mount	Nikon F	Pentax KAF2
Crop Factor	1.5x	1.5x
Image Stabilization		Sensor Shift
Image Stabilization Compensation		5.5 stops
Digital Image Stabilization
Reflex Mirror	Quick-return type

Screen	Nikon D7100	Pentax K-3 Mark III
Screen Type	Fixed	Fixed
Screen Technology	Wide Viewing Angle TFT-LCD	TFT LCD
Touch Screen
Screen Size	3.2"	3.2"
Screen Resolution	1,229k dot	1,620k dot
Top LCD Screen
Live View
Live Composition

Viewfinder	Nikon D7100	Pentax K-3 Mark III
Viewfinder	Optical (pentaprism)	Optical (pentaprism)
Viewfinder Coverage	100%	100%
Viewfinder Magnification	0.94x	1.05x
Viewfinder Magnification (35mm equivalent)	0.63x	0.70x
Viewfinder Eyepoint	19.5 mm	20.5 mm
Diopter Adjustment	-2 to +1	-4 to +1

Shutter	Nikon D7100	Pentax K-3 Mark III
Shutter Type	Electronically controlled vertical-travel focal-plane	Electronic
Min Shutter Speed	30 sec	30 sec
Max Shutter Speed (Mechanical or 1st Curtain)	1/8000 sec	1/8000 sec
Max Continuous Shooting	6.0 fps	12.0 fps
Mirror Lock Up
Continuous Shooting Resolution/fps/buffer		Mechanical Shutter Up to 12 fps at 25.7 MP for up to 37 Frames (JPEG) / 32 Frames (Raw) Mechanical Shutter Up to 7 fps at 25.7 MP for up to 60 Frames (JPEG) / 37 Frames (Raw) Mechanical Shutter Up to 2.5 fps at 25.7 MP for up to 90 Frames (JPEG) / 39 Frames (Raw)

Flash	Nikon D7100	Pentax K-3 Mark III
Built-in Flash
Flash Modes	Auto On Off Red-eye Slow sync Rear curtain	Auto Auto + Red-eye Reduction Flash On Flash On + Red-eye Reduction Slow- speed Sync Slow-speed Sync + Red-eye P-TTL Contrast-control-sync High-speed sync Wireless sync
Flash Range	12.00 m at ISO 100
Max Flash Sync Speed	1/250 sec	1/200 sec
Flash Compensation	-3 to +1 EV (1/3, 1/2 EV Steps)	-2 to +1 EV (1/3, 1/2 EV Steps)
Flash Bracketing	2 to 5 frames in steps of 1/3, 1/2, 2/3, 1, 2 or 3 EV
External Flash Connectivity
External Flash System	TTL: i-TTL flash control using 2,016-pixel RGB sensor is available with built-in flash and SB-910, SB-900, SB-800, SB-700, SB-600, or SB-400; i-TTL balanced fill-flash for digital SLR is used with matrix and center-weighted metering, standard i-TTL flash for digital SLR with spot metering	P-TTL
External Flash Connection	Hot Shoe	Hot Shoe, PC Terminal

Exposure	Nikon D7100	Pentax K-3 Mark III
Exposure Metering Modes	Multi Center-weighted Average Spot	Multi Center-weighted Highlight-weighted Spot
Exposure Modes	Aperture Priority, Auto, Manual, Program, Shutter Priority	Aperture Priority, Auto, Manual, Program, Sensitivity Priority, Shutter Priority
Metering Range	0 to +20 EV	-3 to +20 EV
Exposure Compensation	±5 EV (1/3 EV, 1/2 EV increments)	±5 EV (1/3 EV, 1/2 EV increments)
Exposure Bracketing	(2, 3, 5 shots at 1/3 EV, 1/2 EV, 2/3 EV, 1 EV, 2 EV increments)	±5 EV (2, 3, 5 shots at 1/3 EV, 1/2 EV increments)
Exposure Lock	Luminosity locked at detected value with AE-L/AF-L button	Button type (timer type: two times the meter operating time set in Custom Setting); Continuous as long as the shutter button is halfway pressed

DXO	Nikon D7100	Pentax K-3 Mark III
DxO Low Light ISO	1256
DxO Color Depth	24.2
DxO Dynamic Range	13.7
DxO Overall Score	83

Video	Nikon D7100	Pentax K-3 Mark III
Movie File Format	MOV
Internal Recording Modes		H.264/MOV 4K UHD: 3840 x 2160 @ 23.98/29.97 fps Full HD: 1920 x 1080p @ 23.98/29.97/59.94 fps
Interval Recording
Video Formats	MPEG-4, H.264	MPEG-4, H.264
Max Video Resolution	1920 x 1080	3840 x 2160
Unlimited Video Recording
Recording Limit		25 min

Terminals	Nikon D7100	Pentax K-3 Mark III
Audio I/O		1 x 1/8" / 3.5 mm TRS Stereo Headphone Output 1 x 1/8" / 3.5 mm TRS Stereo Microphone Input
Power I/O		1 x USB-C Input/Output
Other I/O		1 x USB-C (USB 3.2 / 3.1 Gen 1) Data Input/Output (Shared with Power Input) 1 x 2.5 mm Sub-Mini Control Input 1 x PC Sync Socket Output
USB Speed	USB 2.0 (480 Mbit/sec)	USB 3.2 Gen 1x1 (5 GBit/sec)
HDMI Output	Mini Type C	Micro
Speaker	Mono	Mono
Built-in Microphone	Stereo	Stereo
Microphone Input
Headphone Output
Flash Sync Port

Connectivity	Nikon D7100	Pentax K-3 Mark III
Built-in GPS
Built-In Wi-Fi	Optional
Wi-Fi Version		802.11b/g/n, 2.4 GHz
Built-In Bluetooth
Remote Control	Optional, wired MC-DC2 or wireless WR-1 and WR-R10	via wireless

Environmental	Nikon D7100	Pentax K-3 Mark III
Environmental Sealing
Operating Temperature	32 to 104°F / 0 to 40°C	14 to 104°F / -10 to 40°C
Operating Humidity	0 to 85%	0 to 85%

Physical	Nikon D7100	Pentax K-3 Mark III
Dimensions	136 x 107 x 76 mm (5.35 x 4.21 x 2.99")	135 x 104 x 74 mm (5.31 x 4.09 x 2.91")
Weight (inc. batteries)	765 g (1.69 lb / 26.98 oz)	820 g (1.81 lb / 28.92 oz)
Box Dimensions (LxWxH)	8.7 x 6.7 x 5.8"	8.3 x 6.5 x 5.1"
Package Weight	4.75 lb	3.035 lb

Power and Storage	Nikon D7100	Pentax K-3 Mark III
Battery Pack	EN-EL15	D-LI90
Battery Life	950 shots	800 shots
USB Charging
Internal Storage
External Storage	Dual Slot: SD/SDHC/SDXC (UHS-I)	Slot 1: SD/SDHC/SDXC (UHS-II) Slot 2: SD/SDHC/SDXC (UHS-I)

Other	Nikon D7100	Pentax K-3 Mark III
Self Timer	2 or 10 seconds
Orientation Sensor
Tripod Mounting Thread		1 x 1/4"-20 Female (Bottom)
Accessory Mount		1 x Hot Shoe Mount
Material of Construction	Magnesium Alloy	Magnesium Alloy
Electronic Level Gauge
Sensor Cleaning/Dust Reduction System	Image sensor cleaning

For a full review please go to the review page: