• Medium format 1,436.6mm2
  • 51.4 megapixels
  • ISO 100 - 204,800
  • 1/2.3 inch 28.1mm2
  • 16.0 megapixels
  • 25.00mm - 100.00mm (35mm eq.)
  • Detailed specifications
  • Pentax 645Z
  • Olympus Tough TG-4
Links
Prices: Compare Prices Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax 645D
645D vs 645Z 		Olympus TG-3
TG-3 vs TG-4
Successor:   Olympus TG-5
TG-4 vs TG-5
General
Model Number: 645Z TG-4
Alternate Model Number(s):    
Camera Format: Pro SLR Compact
Currently Manufactured: Yes No
Retail Price: $8499.95 $379.99
Street Price: $4,845.43 $451.50
Date Available: 2014-06-15 2015-05-15
Tripod Mount: Yes Yes
Weight: 54.9 oz (1,555 g)
includes batteries 		8.7 oz (247 g)
includes batteries
Size: 6.1 x 4.6 x 4.8 in.
(156 x 117 x 123 mm) 		4.4 x 2.6 x 1.2 in.
(112 x 66 x 31 mm)
Waterproof: No Yes
Waterproof Depth: n/a 50.00 feet (15 meters)
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Sony BSI CMOS
Effective Megapixels: 51.4 16.0
Sensor Format: Medium format 1/2.3 inch
Sensor size: 1436.64mm2 (43.80mm x 32.80mm) 28.0735mm2 (6.17mm x 4.55mm)
Approximate Pixel Pitch: 5.31 microns 1.34 microns
Focal Length Multiplier: 0.8x n/a
Aspect Ratio: 4:3 4:3
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: None Fixed
Self-Cleaning: Yes No
Sensor shift image stabilization: No Yes
On-Sensor Phase Detect: No No
DxO Sensor Score: 101  
DxO Color Depth Score (bits): 26.0  
DxO Dynamic Range Score (evs): 14.7  
DxO Maximum Effective ISO Score (iso): 4,505  
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) 		4608 x 3456 (15.9 MP, 4:3),
3264 x 2448 (8.0 MP, 4:3),
2048 x 1536 (3.1 MP, 4:3),
640 x 480 (0.3 MP, 4:3)
Image File Format: JPEG, 14-bit PEF / DNG RAW, TIFF JPEG (EXIF 2.3), RAW (.ORF), RAW+JPEG
Continuous-mode frames/second: 3.1 5.1
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (60i/​50i/​30p/​25p/​24p)
1280x720 (60p/​50p/​30p/​25p/​24p) 		1920x1080 (30p)
1280x720 (30p)
640x480 (30p)
640x480 (120p)
320x240 (240p)
Movie File Format: MOV (MPEG-4 AVC/H.264) with stereo sound; Motion JPEG (AVI) for Interval Movie Record MOV/H.264 with stereo sound, AVI/Motion JPEG (High-Speed Movie, Time-Lapse Movie)
Composite Video Out: No Yes
NTSC/PAL Switchable Video: n/a Yes
Video Usable as Viewfinder: n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Pentax 645 bayonet n/a
Lens: n/a Olympus Lens, 9 lenses in 7 groups, with dual aspheric elements and 2 ED elements
Focal Length (35mm equivalent):   25 - 100mm
Focal Length (actual):   4.5 - 18mm
Zoom Ratio:   4.00x
Aperture Range:   f/2.0/2.8/8.0 (wide) / f/4.9/6.3/18 (tele); 2-step aperture + ND filter
Integrated ND Filter: No No
Normal Focus Range:   10 cm to Infinity
3.9 in to Infinity
Macro Focus Range:   1 cm to Infinity
0.4 in to Infinity
Filter Thread: n/a 40.5mm
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: Yes
Digital Zoom Values:   Up to 4x (2x Super Resolution Zoom)
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) Contrast Detection: Face Detect AF, iES, Spot AF, AF Tracking, AF Target Selection
Auto Focus Assist Light? No Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD No / 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)  
Focus Peaking: Yes No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.78x  
Viewfinder Magnification (nominal/claimed): 0.62x  
Display
Eye-level Viewfinder: Yes No
Rear Display: Yes Yes
Rear Display Size (inches): 3.2 3.0
Rear Display Resolution: 1,036,800 dots (345,600 px) 460,800 dots (153,600 px)
Touchscreen: No No
Articulating Screen: Yes No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 16.0x 10.0x
Top Deck Display: Yes No
Exposure
Maximum ISO (native): 204800 6400
Minimum ISO (native): 100 100
ISO Settings: Auto, 100-204800 in 1, 1/2 or 1/3EV steps Auto, High, 100, 200, 400, 800, 1600, 3200, 6400
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, Sunny, Cloudy, Incandescent, Fluorescent1, Underwater, One-touch
Shutter Speed Range: 1/4000 - 30 sec 1/2000 - 4 sec
Bulb Mode: Yes No
Exposure Compensation: +/- 5.0EV in 0.3EV steps +/- 2.0EV in 0.3EV steps
Metering Modes: 86K-pixel RBG sensor: Multi-segment metering, Center-weighted metering, Spot metering Digital ESP Metering, Spot Metering
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes No
Full Manual Exposure: Yes No
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: Portrait, ePortrait, Landscape, Interval , Live Composite, Handheld Star Light, Night Scene, Night + Portrait, Sport, Indoor, Self Portrait, Sunset, Fireworks, Cuisine, Documents, Beach & Snow, Snow, Panorama, Backlight HDR, Underwater Snapshot, Underwater Wide1, Underwater Wide2, Underwater Macro, Underwater HDR; Art Filters: Pop Art, Soft Focus, Pale & Light Color, Grainy Film, Pin Hole, Diorama, Dramatic Tone, Fish Eye, Sparkle, Reflection, Fragmented; Microscope Modes: Microscope, Focus Stacking, Focus Bracketing, Microscope Control; Photo Story
Self Timer: 2 or 12 seconds 2, 12, custom 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 Flash Auto, Red-Eye Reduction, Fill-In, Flash Off, Remote Control, SLV Slave, Slow Synchronization, LED On
Flash Guide Number (ISO 100): n/a n/a
Flash Range Description: n/a ISO 1600: W: 0.2m - 7.9m; T: 0.1m - 3.1m
Max Flash Sync: 1/125  
Flash Exposure Compensation: -2 to +1 EV +/- 2.0 EV in 0.3EV steps
External Flash Connection: Hot shoe, X-sync socket n/a
Built-In Wireless Flash Control:   Full TTL exposure
Image Storage
Usable Memory Types: SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: UHS-I UHS-I
Other Memory:    
Dual Card Slots: Yes No
RAW Capture Support: Yes Yes
Uncompressed Format: 14-bit PEF / DNG RAW, TIFF RAW (.ORF), RAW+JPEG
Movie File Format: MOV (MPEG-4 AVC/H.264) with stereo sound; Motion JPEG (AVI) for Interval Movie Record MOV/H.264 with stereo sound, AVI/Motion JPEG (High-Speed Movie, Time-Lapse Movie)
Included Memory: No memory included 55.0 MB
Included Memory Type:   Internal
Connectivity
Built-In Wi-Fi: No Yes
NFC: No No
Bluetooth: No No
Built-In GPS: No Yes
Microphone Jack: Yes No
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
Connections (extended): Micro (Type-D) HDMI, DC input, Stereo microphone jack, wired remote socket Multi-terminal (USB Connector, DC Jack, Audio/Video Output), Micro HDMI (Type D)
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.35 0.51
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 0.59
Camera penalizes early shutter press? Yes No
JPEG shooting speed in burst mode (fps, max resolution): 3.1 5.1
Buffer size for JPEG shooting in burst mode (frames, max resolution): 12 100
RAW shooting speed in burst mode (fps): 3.1  
Buffer size for RAW shooting in burst mode (frames): 10  
RAW+JPEG shooting speed in burst mode (fps): 3.1  
Buffer Size for RAW+JPEG shooting in burst mode (frames): 10  
Shutter lag (full AF, wide/mid): 0.16 seconds 0.26 seconds
Shutter lag (full AF, tele):   0.16 seconds
Shutter lag (full AF, live view - DSLR): 1.17 seconds  
Shutter lag (prefocused, live view - DSLR): 0.385 seconds  
Shutter Lag (manual focus): 0.117 seconds 0.096 seconds
Shutter lag (full AF, with flash):   0.32 seconds
Shutter Lag (prefocused): 0.112 seconds 0.032 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 1.0 seconds
Play -> Record Time: 0.7 seconds 0.7 seconds
Flash cycle time, full power:   1.8 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   380 shots
Battery Life, Still (CIPA Rating OVF/EVF): 650 shots  
Battery Life, Video:    
Battery Form Factor: Proprietary D-LI90 Proprietary LI-92B
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary D-LI90 Lithium-ion rechargeable 1 x Proprietary LI-92B Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes No
Internal Charging Supported: No Yes
Software
Included Software:   CD-ROM with Instruction Manual and Olympus Viewer 3 Software
OS Compatibility:   Windows, Mac OS X
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. Waterproof to 50 feet (15 m), crushproof to 220 pounds (100kgf), shockproof from 7 feet (2.1 m), freezeproof down to 14F (-10C), and dustproof. Available in red or black.