• Medium format 1,436.6mm2
  • 51.4 megapixels
  • ISO 100 - 204,800
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 25,600
  • Detailed specifications
  • Pentax 645Z
  • Nikon D5500
Links
Prices: Compare Prices Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax 645D
645D vs 645Z 		Nikon D5300
D5300 vs D5500
Successor:   Nikon D5600
D5500 vs D5600
General
Model Number: 645Z D5500
Alternate Model Number(s):    
Camera Format: Pro SLR SLR
Currently Manufactured: Yes No
Retail Price: $8499.95 $999.95
Street Price: $4,845.43 $596.95
Date Available: 2014-06-15 2015-02-15
Tripod Mount: Yes Yes
Weight: 54.9 oz (1,555 g)
includes batteries 		23.6 oz (668 g)
includes batteries, kit lens
Size: 6.1 x 4.6 x 4.8 in.
(156 x 117 x 123 mm) 		4.9 x 3.8 x 2.8 in.
(124 x 97 x 70 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Sony Sony
Effective Megapixels: 51.4 24.2
Sensor Format: Medium format APS-C
Sensor size: 1436.64mm2 (43.80mm x 32.80mm) 366.6mm2 (23.50mm x 15.60mm)
Approximate Pixel Pitch: 5.31 microns 3.92 microns
Focal Length Multiplier: 0.8x 1.5x
Aspect Ratio: 4:3 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: None None
Self-Cleaning: Yes Yes
Sensor shift image stabilization: No No
On-Sensor Phase Detect: No No
DxO Sensor Score: 101 84
DxO Color Depth Score (bits): 26.0 24.1
DxO Dynamic Range Score (evs): 14.7 14.0
DxO Maximum Effective ISO Score (iso): 4,505 1,438
Image Capture
Image Resolution: 8256 x 6192 (51.1 MP, 4:3),
6192 x 5184 (32.1 MP, Other),
5376 x 4032 (21.7 MP, 4:3),
1920 x 1440 (2.8 MP, 4:3) 		6000 x 4000 (24.0 MP, 3:2),
4496 x 3000 (13.5 MP, 3:2),
2992 x 2000 (6.0 MP, 3:2)
Image File Format: JPEG, 14-bit PEF / DNG RAW, TIFF JPEG (EXIF 2.3), RAW (12 or 14-bit .NEF), RAW+JPEG
Continuous-mode frames/second: 3.1 4.9
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (60i/​50i/​30p/​25p/​24p)
1280x720 (60p/​50p/​30p/​25p/​24p) 		1920x1080 (60p/​50p/​30p/​25p/​24p)
1280x720 (60p/​50p)
640x424 (30p/​25p)
Movie File Format: MOV (MPEG-4 AVC/H.264) with stereo sound; Motion JPEG (AVI) for Interval Movie Record MOV (Video: H.264/MPEG-4 AVC; Audio: Stereo Linear PCM)
Composite Video Out: No Yes
NTSC/PAL Switchable Video: n/a Yes
Video Usable as Viewfinder: n/a No
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Pentax 645 bayonet Nikon F
Lens: n/a Nikkor AF-S DX 18-55mm f/3.5-5.6G VR II
Focal Length (35mm equivalent):   27 - 83mm
Focal Length (actual):   18 - 55mm
Zoom Ratio:   3.05x
Aperture Range:   f/3.5 - 22 (W), f/5.6 - 36 (T); 7-blade (rounded) aperture
Integrated ND Filter: No No
Normal Focus Range:   28 cm to Infinity
11.0 in to Infinity
Macro Focus Range:    
Filter Thread: n/a 52.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom: No
Digital Zoom Values:   n/a
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 27-point SAFOX 11+ Phase Difference Detection (25 cross type focus points in the center): Spot, Select, Expanded Area AF (S, M, L), Zone Select, Auto (27 AF Points) OVF: 39-point (9 cross type) TTL phase detection with 3D focus tracking by Nikon Multi-CAM 4800 DX; Live View: Contrast detect with Face-priority AF, wide-area AF, normal-area AF, subject-tracking AF
Auto Focus Assist Light? No Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD Optical / LCD
Viewfinder Type: Trapezoid prism finder w/ interchangeable Natural-Bright-Matte focusing screen; Coverage: ~98%; Magnification: ~0.62x (55mmF2.8 at infinity), ~0.85x (75mmF2.8 at infinity); Diopter: -3.5 m to + 2.0 m-1; Eye Relief: ~21 mm (from view window), ~24.1 mm (from center of lens) SLR type; eye-level pentamirror, 95% coverage, 0.82x mag., 17mm eyepoint, -1.7 to +0.5 diopter, Type B BriteView Clear Matte Mark VII screen; Eye sensor
Focus Peaking: Yes No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.78x 0.55x
Viewfinder Magnification (nominal/claimed): 0.62x 0.82x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.2 3.2
Rear Display Resolution: 1,036,800 dots (345,600 px) 1,036,800 dots (345,600 px)
Touchscreen: No Yes
Articulating Screen: Yes Yes
Tilt Swivel Screen: No Yes
Selfie Screen: No Yes
Max Playback Zoom: 16.0x  
Top Deck Display: Yes No
Exposure
Maximum ISO (native): 204800 25600
Minimum ISO (native): 100 100
ISO Settings: Auto, 100-204800 in 1, 1/2 or 1/3EV steps Auto, 100 - 25600 in steps of 1/3 EV
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Multi Auto, Daylight, Shade, Cloudy, Fluorescent Light (D: Daylight Color, N: Daylight White, W: Cool White, L: Warm White), Tungsten, Flash, CTE; Manual mode(s): Manual (up to 3 settings can be saved), Color Temperature (up to 3 settings can be saved), Copying the white balance settings of a captured image possible Auto, Incandescent, Fluorescent (7 types), Direct Sunlight, Flash, Cloudy, Shade, Preset Manual; all except Preset Manual with fine tuning
Shutter Speed Range: 1/4000 - 30 sec 1/4000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 5.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 86K-pixel RBG sensor: Multi-segment metering, Center-weighted metering, Spot metering 2016-pixel 3D Color Matrix Metering II, Color Matrix Metering II, Center-weighted, Spot (2.5% of frame)
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Sensitivity Priority, Shutter & Aperture Priority; HDR Capture: Auto, Type1, Type2, Type3, Exposure Bracket Value adjustable, Auto Align (automatic composition correction function) available; Custom Image: Bright, Natural, Portrait, Landscape, Vibrant, Radiant, Muted, Bleach Bypass, Reversal Film, Monochrome, Cross Processing (Random, Preset 1-3, Favorite 1-3) Scene Modes: Autumn Colors, Beach/Snow, Blossom, Candlelight, Child, Close-up, Dusk/Dawn, Food, Landscape, Night Landscape, Night Portrait, Party/Indoor, Pet Portrait, Portrait, Sports, Sunset, Special Effects Mode (Night Vision, Super Vivid, Pop, Photo Illustration, Toy Camera, Miniature Effect, Selective Color, Silhouette, High Key, Low Key), HDR
Self Timer: 2 or 12 seconds 2s, 5s, 10s, 20s; 1 to 9 exposures seconds
Time Lapse (intervalometer): Yes Yes
High Resolution Composite: No No
Flash
Built-in Flash: No Yes
Flash Modes: P-TTL; high-speed sync, wireless sync supported with compatible flash unit Auto, auto with red-eye reduction, auto slow sync, auto slow sync with red-eye reduction, fill-flash, red-eye reduction, slow sync, slow sync with red-eye reduction, rear-curtain with slow sync, rear-curtain sync, off; Advanced Wireless Lighting supported with SB-910, SB-900, SB-800 as master
Flash Guide Number (ISO 100): n/a 12.0 m / 39.4 ft.
Flash Range Description: n/a Lens dependent; Approx. 39/12 (ft/m, ISO 100, 68F/20C)
Max Flash Sync: 1/125 1/200
Flash Exposure Compensation: -2 to +1 EV -3 to +1 EV in 0.3EV steps
External Flash Connection: Hot shoe, X-sync socket Hot Shoe
Built-In Wireless Flash Control:   No
Image Storage
Usable Memory Types: SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: UHS-I UHS-I
Other Memory:   UHS-I compliant
Dual Card Slots: Yes No
RAW Capture Support: Yes Yes
Uncompressed Format: 14-bit PEF / DNG RAW, TIFF RAW (12 or 14-bit .NEF), RAW+JPEG
Movie File Format: MOV (MPEG-4 AVC/H.264) with stereo sound; Motion JPEG (AVI) for Interval Movie Record MOV (Video: H.264/MPEG-4 AVC; Audio: Stereo Linear PCM)
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No Yes
NFC: No No
Bluetooth: No No
Built-In GPS: No No
Microphone Jack: Yes Yes
Headphone Jack: No No
External Connections: USB 3.0 Super Speed USB 2.0 High Speed,WiFi
PictBridge Compliant: No Yes
DPOF Compliant: No Yes
Remote Control: Yes Yes
Remote Control Type: Optional wired or wireless Via Wi-Fi or optional ML-L3, WR-1, WR-T10/ WR-R10 or MC-DC2 remote cord
Connections (extended): Micro (Type-D) HDMI, DC input, Stereo microphone jack, wired remote socket Type C mini-HDMI with CEC, Accessory Terminal (MC-DC2 remote cord or GP-1 GPS unit), 3.5mm stereo mic jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.35 0.42
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.33  
Buffer size for RAW shooting in single shot mode (frames): 10  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot): 0.33 0.41
Camera penalizes early shutter press? Yes No
JPEG shooting speed in burst mode (fps, max resolution): 3.1 4.9
Buffer size for JPEG shooting in burst mode (frames, max resolution): 12 100
RAW shooting speed in burst mode (fps): 3.1 4.0
Buffer size for RAW shooting in burst mode (frames): 10 7
RAW+JPEG shooting speed in burst mode (fps): 3.1 3.9
Buffer Size for RAW+JPEG shooting in burst mode (frames): 10 5
Shutter lag (full AF, wide/mid): 0.16 seconds 0.20 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR): 1.17 seconds 0.86 seconds
Shutter lag (prefocused, live view - DSLR): 0.385 seconds 0.280 seconds
Shutter Lag (manual focus): 0.117 seconds 0.100 seconds
Shutter lag (full AF, with flash):   0.23 seconds
Shutter Lag (prefocused): 0.112 seconds 0.079 seconds
Shutter Lag (notes): OVF: Full AF lag, wide-area mode = 0.170s Live View: Full AF lag, Spot AF mode = 1.174s Prefocused = 0.385s  
Startup Time: 1.5 seconds 0.4 seconds
Play -> Record Time: 0.7 seconds 0.2 seconds
Flash cycle time, full power:   1.8 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):    
Battery Life, Still (CIPA Rating OVF/EVF): 650 shots 820 shots
Battery Life, Video:    
Battery Form Factor: Proprietary D-LI90 Proprietary EL14a
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary D-LI90 Lithium-ion rechargeable 1 x Proprietary EL14a Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes Yes
Internal Charging Supported: No No
Software
Included Software:   Nikon ViewNX 2 CD-ROM
OS Compatibility:   Windows, Mac OS
Miscellaneous
Notes & Features: New 51.4MP AA-filterless CMOS sensor, PRIME III processor, 27-point SAFOX 11 AF, 86K RGB metering, Full HD video up to 60i, tilting LCD monitor with Live View, 3fps full-res continuous burst mode. Available in black or red, in two different kit configurations: with the AF-S DX NIKKOR 18-55mm f/3.5-5.6G VR II lens or the AF-S DX NIKKOR 18-140mm f/3.5-5.6G ED VR lens.