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Compare Pentax 645Z vs Sigma sd Quattro H vs Sigma fp

Connectivity

Ports
HDMI + Microphone + Remote Control + USB 3.0
HDMI + Remote Control + USB 3.0
HDMI + Headphone + Microphone + Remote Control + USB 3.2 Gen 1

Construction

Form Factor
Mirrorless camera
Mirrorless camera
Image Size
Medium format (645)
APS-H (26.6 x 17.9 mm)
Full frame (35.9 x 23.9 mm)
Lens Mount
PENTAX 645AF2
Sigma SA-mount
Leica L-mount
Microphone
Mono
None
Stereo
Sensor | Resolution
51 MP (8256 x 6192)
45 MP (6200 x 4152)
25 MP (6000 x 4000)
Sensor | Type
CMOS
CMOS (Foveon X3)
BSI-CMOS
Speakers
Stereo
None
Mono

Dimensions

Size | Depth
123 mm / 4.84 in
91 mm / 3.58 in
45 mm / 1.77 in
Size | Height
117 mm / 4.61 in
95 mm / 3.74 in
70 mm / 2.76 in
Size | Width
156 mm / 6.14 in
147 mm / 5.79 in
113 mm / 4.45 in
Weight
1550 g / 54.77 oz
422 g / 14.91 oz

Display

Display Diagonal
3.2 inch
3 inch
3.2 inch
Display Type
Tilting TFT LCD
Fixed TFT LCD
Fixed TFT LCD
Resolution
1,037,000 dots
1,620,000 dots
2,100,000 dots
Viewfinder | Coverage
98%
100%
Viewfinder | Magnification
0.62x
1.09x
Viewfinder | Resolution
2,360,000 dots
Viewfinder | Type
Optical (pentaprism)
Electronic
None

Function

AE Bracketing
±5 (2, 3, 5 frames at 1/3 EV, 1/2 EV, 1 EV, 2 EV steps)
±3 (3, 5 frames at 1/3 EV steps)
±3 (3, 5 frames at 1/3 EV steps)
Autofocus
27 focus points
9 focus points
49 focus points
Crop Factor
0.6
1.0
Exposure Compensation
±5 (at 1/3 EV, 1/2 EV steps)
±5 (at 1/3 EV steps)
±5 (at 1/3 EV steps)
Exposure Mode
Auto / Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
Auto / Aperture Priority / Shutter Priority / Manual
GPS
Optional via O-GPS1
No
No
ISO Range
to, ISO 100 ~ 204800
100 ~ 6400
100 ~ 25600 (expands to 6 ~ 102400)
Image Stabilization
No
No
No
Intervalometer
Yes
Yes
Processor
PRIME III
Dual TRUE III
Touch Screen
No
No
Yes
Video Codecs
MPEG-4, H.264
MPEG-4, H.264
Weather Resistance
Yes
Yes
Yes

Performance

Battery Life
650 shots
280 shots
Max Burst Rate
3.0 fps
3.8 fps
18.0 fps
Storage
Dual SD/SDHC/SDXC slots
SD/SDHC/SDXC
SD/SDHC/SDXC (UHS-II supported)

Production

Battery
D-LI90 lithium-ion battery and charger
BP-61 lithium-ion battery & charger
BP-51 lithium-ion battery and charger
Debut
2014-04-15
2016-02-23
2019-07-11

Reviews

Neofiliac score
62%
49%
75%
Pros
  • Long battery life
  • Medium format look
  • Exceptionally high 51 MP resolution
  • Weather-sealed
  • Affordable for a 645 DSLR
  • High 45 MP resolution
  • Weather-sealed
  • Viewfinder with great 1.09x magnification
  • Foveon sensor
  • High 18.0 fps burst rate
  • Exceptionally compact
  • Quite light
  • Weather-sealed
Cons
  • Menu not touch-enabled
  • Very low 3.0 fps burst rate
  • Very large in size
  • Very heavy
  • Viewfinder coverage is cropped at 98%
  • Viewfinder with low 0.62x magnification
  • Menu not touch-enabled
  • Very low 3.8 fps burst rate
  • Low resolution EVF
  • Poor battery life

Price

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