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Compare Sigma SD1 Merrill vs Sigma sd Quattro H vs Pentax 645D

Connectivity

Ports
USB 2.0
HDMI + Remote Control + USB 3.0
Remote Control + USB 2.0

Construction

Form Factor
DSLR camera
Mirrorless camera
Image Size
APS-C (24 x 16 mm)
APS-H (26.6 x 17.9 mm)
Medium format (645)
Lens Mount
Sigma SA-mount
Sigma SA-mount
Microphone
None
None
Stereo
Sensor | Resolution
45 MP (4800 x 3200)
45 MP (6200 x 4152)
40 MP (7264 x 5440)
Sensor | Type
CMOS (Foveon X3)
CMOS (Foveon X3)
CCD
Speakers
None
None
None

Dimensions

Size | Depth
80 mm / 3.15 in
91 mm / 3.58 in
119 mm / 4.69 in
Size | Height
113 mm / 4.45 in
95 mm / 3.74 in
117 mm / 4.61 in
Size | Width
146 mm / 5.75 in
147 mm / 5.79 in
156 mm / 6.14 in
Weight
1480 g / 52.30 oz

Display

Display Diagonal
3 inch
3 inch
3 inch
Display Type
Fixed
Fixed TFT LCD
Fixed TFT Color LCD with wide-viewing angle and with AR coating
Resolution
460,000 dots
1,620,000 dots
921,000 dots
Viewfinder | Coverage
98%
100%
98%
Viewfinder | Magnification
0.95x
1.09x
0.85x
Viewfinder | Resolution
2,360,000 dots
Viewfinder | Type
Optical (pentaprism)
Electronic
Optical (pentaprism)

Function

AE Bracketing
±3 (3, 5 frames at 1/3 EV steps)
±2 (3, 5 frames at 1/7 EV, 1/5 EV, 1/3 EV, 1/2 EV, 2/3 EV, 1 EV steps)
Autofocus
9 focus points
11 focus points
Crop Factor
1.5
0.6
Exposure Compensation
±5 (at 1/3 EV steps)
±5 (at 1/3 EV, 1/2 EV steps)
Exposure Mode
Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
Flash
Manual Pop-up Built-in flash
GPS
No
No
No
ISO Range
100 ~ 6400
200, 400, 800, 1600 (100 with boost)
Image Stabilization
No
No
No
Intervalometer
Yes
Processor
Dual True II
Dual TRUE III
Prime II
Touch Screen
No
No
No
Weather Resistance
Yes
Yes
Yes

Performance

Max Burst Rate
3.8 fps
1.1 fps
Storage
Compact Flash (Type I, UDMA compatible)
SD/SDHC/SDXC
SD/SDHC

Production

Battery
Lithium-Ion rechargeable battery & charger
BP-61 lithium-ion battery & charger
Lithium-Ion D-LI90 rechargeable battery & charger
Debut
2012-02-08
2016-02-23
2010-03-10

Reviews

Neofiliac score
42%
49%
57%
Pros
  • High 45 MP resolution
  • Weather-sealed
  • Unique high-resolution Foveon sensor
  • High 45 MP resolution
  • Weather-sealed
  • Viewfinder with great 1.09x magnification
  • Foveon sensor
  • Medium format look
  • Weather-sealed
  • Affordable for a 645 DSLR
Cons
  • Viewfinder coverage is cropped at 98%
  • Menu not touch-enabled
  • Very low 3.8 fps burst rate
  • Low resolution EVF
  • Menu not touch-enabled
  • Very low 1.1 fps burst rate
  • Very large in size
  • Very heavy
  • Viewfinder coverage is cropped at 98%

Price

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