Pentax KF vs Sigma SD1 Merrill

General	Pentax KF	Sigma SD1 Merrill
Brand	Pentax	Sigma
Model	KF	SD1 Merrill
Predecessor Model	Pentax K-70	Sigma SD1
MSRP	$649/£559 (body only), £799 (w/18-135mm lens)
Camera Type	Interchangeable Lens	Interchangeable Lens
Body Type	DSLR	DSLR
Video Capture

Sensor	Pentax KF	Sigma SD1 Merrill
Sensor Type	CMOS	CMOS (Foveon X3)
Sensor Size	APS-C	APS-C
Sensor Dimensions	23.5 x 15.6 mm	24 x 16 mm
Total Pixels	24.78 Megapixel	46 Megapixel
Effective Pixels	24.24 Megapixel	15 Megapixel
Low Pass Filter
Native ISO Range	100 - 102,400	100 - 6,400
Sensor Shift High Resolution Mode

Photo	Pentax KF	Sigma SD1 Merrill
Processor	PRIME MII	Dual TRUE II
Max Image Resolution	6000 x 4000	4800 x 3200
Other Resolutions	4608 x 3072, 3072 x 2048, 1920 x 1280
Image Aspect Ratios	3:2	4:3
Image File Format	JPEG, RAW	JPEG, RAW
JPEG Quality Levels	Best, better, good
Bit Depth	14-Bit	12-Bit
Color Space	sRGB, Adobe RGB
Timelapse Recording
White Balance	Presets: Auto, CTE, Cloudy, Daylight, Fluorescent, Fluorescent (Cool White), Fluorescent (Day White), Fluorescent (Warm White), Manual, Multi Auto WB, Shade, Tungsten

Focus	Pentax KF	Sigma SD1 Merrill
Autofocus Modes	Multi-area Center Selective single-point Tracking Single Continuous Face Detection Live View	Multi-area Single Continuous
Lens Servo	Automatic, Continuous-Servo AF, Single-Servo AF	Continuous-Servo AF, Manual Focus, Single-Servo AF
AF Detection Range	-3 to +18 EV	0 to +18 EV
Number of Focus Points	11
Number of Cross-type Focus Points	9
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	Interchangeable Natural-Bright-Matte III focusing screen

Optics	Pentax KF	Sigma SD1 Merrill
Lens Mount	Pentax KAF2	Sigma SA
Crop Factor	1.5x	1.5x
Image Stabilization	Sensor Shift
Image Stabilization Compensation	4.5 stops
Digital Image Stabilization

Screen	Pentax KF	Sigma SD1 Merrill
Screen Type	Fully Articulated	Fixed
Screen Technology	TFT LCD
Touch Screen
Selfie & Vlogger Friendly LCD Screen
Screen Size	3.0"	3.0"
Screen Resolution	1,037k dot	460k dot
Top LCD Screen
Live View
Live Composition

Viewfinder	Pentax KF	Sigma SD1 Merrill
Viewfinder	Optical (pentaprism)	Optical (pentaprism)
Viewfinder Coverage	100%	96%
Viewfinder Magnification	0.95x	0.95x
Viewfinder Magnification (35mm equivalent)	0.63x	0.63x
Diopter Adjustment	-2.5 to +1.5	-3 to +1.5

Shutter	Pentax KF	Sigma SD1 Merrill
Shutter Type	Electronic
Min Shutter Speed	30 sec
Max Shutter Speed (Mechanical or 1st Curtain)	1/6000 sec
Max Continuous Shooting	6.0 fps
Continuous Shooting Resolution/fps/buffer	Electronic Shutter Up to 6 fps at 24.2 MP for up to 40 Frames (JPEG) / 10 Frames (Raw) Electronic Shutter Up to 3 fps at 24.2 MP for up to 100 Frames (JPEG) / 16 Frames (Raw)

Flash	Pentax KF	Sigma SD1 Merrill
Built-in Flash
Flash Modes	Auto auto w/redeye reduction flash on flash + redeye reduction slow sync trailing curtain sync manual
Flash Range	12.00 m at ISO 100
Max Flash Sync Speed	1/180 sec	1/180 sec
Flash Compensation	-2 to +1 EV
External Flash Connectivity
External Flash System	P-TTL
External Flash Connection	Hot Shoe, Wireless	Hot Shoe

Exposure	Pentax KF	Sigma SD1 Merrill
Exposure Metering Modes	Multi Center-weighted Spot	Multi Center-weighted Average
Exposure Modes	Aperture Priority, Auto, Manual, Program, Sensitivity Priority, Shutter Priority	Aperture Priority, Manual, Program, Shutter Priority
Metering Range	0 to +22 EV
Exposure Compensation	±5 EV (1/3 EV, 1/2 EV increments)	±3 EV (1/3 EV increments)
Exposure Bracketing	±5 EV (2, 3, 5 shots )
Exposure Lock	Can be assigned to the AF/AE-L button

Video	Pentax KF	Sigma SD1 Merrill
Internal Recording Modes	H.264/MPEG-4 AVC Full HD: 1920 x 1080 @ 24/25/30.00/50/60.00 fps HD: 1280 x 720 @ 50/60.00 fps
Interval Recording
Video Formats	MPEG-4, H.264
Max Video Resolution	1920 x 1080
Unlimited Video Recording
Recording Limit	25 min

Terminals	Pentax KF	Sigma SD1 Merrill
Audio I/O	1 x 1/8" / 3.5 mm TRS Stereo Microphone Input
Other I/O	1 x Micro-USB (USB 2.0) Input
USB Speed	USB 2.0 (480 Mbit/sec)	USB 2.0 (480 Mbit/sec)
HDMI Output	Mini
Speaker	Mono
Built-in Microphone	Stereo
Microphone Input
Headphone Output
Flash Sync Port

Connectivity	Pentax KF	Sigma SD1 Merrill
Built-in GPS
Built-In Wi-Fi
Wi-Fi Version	802.11b/g/n, 2.4 GHz
Built-In Bluetooth
Mobile App Compatible	: Android & iOS App Name: Image Sync Functionality: Adjust Settings, Remote Control *As of November, 2022: Check with manufacturer for the most up-to-date compatibility
Remote Control	wired or wireless

Environmental	Pentax KF	Sigma SD1 Merrill
Environmental Sealing
Operating Temperature	14 to 104°F / -10 to 40°C
Operating Humidity	0 to 85%

Physical	Pentax KF	Sigma SD1 Merrill
Dimensions	126 x 93 x 74 mm (4.94 x 3.66 x 2.91")	146 x 113 x 80 mm (5.75 x 4.45 x 3.15")
Weight (inc. batteries)	688 g (1.52 lb / 24.27 oz)	790 g (1.74 lb / 27.87 oz)
Box Dimensions (LxWxH)	8.3 x 6.9 x 5"	7.6 x 7 x 5.6"
Package Weight	2.73 lb	3.55 lb

Power and Storage	Pentax KF	Sigma SD1 Merrill
Battery Pack	D-LI109
Battery Life	410 shots
Internal Storage
External Storage	Single Slot: SD/SDHC/SDXC (UHS-I)	Single Slot: CompactFlash (Type I, UDMA compatible)

Other	Pentax KF	Sigma SD1 Merrill
Self Timer	2 or 12 secs, continuous
Astro Tracer feature for Astrophotography
Orientation Sensor
Tripod Mounting Thread	1 x 1/4"-20 Female (Bottom)

For a full review please go to the review page: