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| Type | TTL autofocus, auto-exposure medium format digital SLR camera | |
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| Effective Pixels | approx. 40 megapixels | |
| Image Sensor | Total pixels | approx. 40.01 megapixels |
| Type | CCD with a primary color filter | |
| Size | 44mm x 33mm | |
| Pixel size | 6.0 μm x 6.0 μm | |
| Dynamic Range | 11.5f - stops | |
| Recorded Pixels | Still | JPEG: L[40M]7264x5440 pixels, M[32M]6528x4896 pixels [21M]5376x4032 pixels, S[13M]4224x3168 pixels [7M]3072x2304 pixels RAW: [40M]7264x5440 pixels |
| Formats | Still | RAW(14 bit): (PEF/DNG), JPEG:  (Best), (Better), (Good), RAW+JPEG: available |
| Recording file Format | Still | RAW (PEF/DNG), JPEG (Conforms to Exif 2.21), Conforms to DCF (Design rule of Camera File system) 2.0 |
| Sensitivity ( Standard output sensitivity ) |
Auto:200-1000, Extension:100, 1600 (1EV steps or 1/2EV steps or 1/3EV steps) | |
| Storage Media | SD, SDHC memory card (Dual slot) | |
| White Balance | Auto, Daylight, Shade, Cloudy, Fluorescent Light ( D, N, W, L), Tungsten Light, Flash, CTE, Manual setting 1, Manual setting 2, Manual setting 3, Color temperature setting (3 types) with WB fine adjustment | |
| Custom Image | Bright, Natural, Portrait, Landscape, Vibrant, Muted, Reversal Film, Monochrome | |
| Viewfinder | Type | Trapezoid prism finder |
| Focusing screen | Natural-Bright-Matte focusing screen | |
| Field of view | approx. 98% | |
| Diopter adjustment | approx. -3.5 - +2.0m-1 | |
| Magnification | approx. 0.62 x (with D FA645 55mmF2.8 at infinity), approx. 0.85 x (with FA645 75mmF2.8 at infinity) |
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| Monitor | Type | TFT color LCD monitor, Wide angle view, Brightness adjustable, Color adjustable, AR Coating, Reinforced glass |
| Size | 3.0 inch | |
| Dots | approx. 921,000 dots | |
| Preview Method | Optical preview, Digital preview | |
| Playback | 1 Image, 2 Image, 4 Image, 9 Image, 16 Image, 36 Image, 81 Image, Enlargement (up to 32X, scroll available), Image Rotation, Folder view, Slideshow, Histogram, Resize, Cropping, Bright/Dark area, Calendar view, Index view | |
| Digital Filter | Playback Mode | Monochrome, Extract Color, Color, Base Tweaking, Soft |
| Focusing System | Type | TTL phase difference detection, 11-point autofocus system (SAFOX IX+) |
| Focus Mode | AF-single, AF-continuous | |
| Focus Point | Auto, Select, Center | |
| Superimpose | available | |
| Exposure Control | Metering System | TTL open-aperture 77-segment metering |
| Metering Mode | (1) Multi-segment metering, (2) Center-weighted metering, (3) Spot metering | |
| Exposure Range | EV 2-21 (at Standard Output Sensitivity 200 with 55mmF2.8) | |
| Modes | (1) Program AE, (2) Sensitivity-Priority AE, (3) Shutter-Priority AE, (4) Aperture-Priority AE, (5) Shutter and Aperture Priority AE, (6) Metered Manual, (7) Bulb, (8) X speed | |
| Exposure Compensation |
±5EV | |
| AE Lock | availiable | |
| Shutter | Shutter Type | Electronically controlled vertical-run focal plane shutter |
| Shutter Speed | Auto:1/4000 - 30 sec, Manual:1/4000 - 30 sec (1/3 EV steps or 1/2 EV steps), bulb | |
| Drive Modes | Single-frame, Continuous (Hi, Lo), Self-timer (12s, 2s), Remote control (0s, 3s ), Remote Continuous Shooting, Interval, Multiple Exposure, Exposure Bracketing, Extended Bracketing | |
| Continuous shooting |
<Both 1 slot and 2 slot> approx. 1.1 fps, RAW(PEF)+JPEG(40M at ): until approx. 13 fps, RAW(PEF): until approx. 13 fps, RAW(DNG): until approx. 13 fps, JPEG(40M at ): until approx. |
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| Mirror Lock-up shooting |
available by dedicated dial | |
| Flash Synchronization | Hot shoe, X-sync socket, sync-speed: 1/125 sec., P-TTL, high-speed-sync, wireless-sync with PENTAX dedicated external flash | |
| Dust Removal | Image sensor cleaning function by supersonic vibration (DR II) with dust alert function | |
| Time | World Time | 75 cities (28 time zones) |
| Data Folder | Folder Name | Date (100_MMDD···), PENTX (100PENTX, 101PENTX···) , |
| File Name | Standard, User customize | |
| Power Sources | Rechargeable D-LI90 lithium-ion battery Optional AC adapter also available. |
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| Battery Life | Number of recordable images |
approx. 800 (23°C) *, approx. 700 (0°C), approx. 650 (-10°C) |
| Playback time | approx. 440 minutes (23°C) *, approx. 400 minutes (0°C), approx. 380 minutes (-10°C) | |
| Interfaces | USB2.0 (Hi-Speed:mini B type), Video output (mini phone type), HDMI output (type C mini), DC input , Cable switch, X-sync socketc | |
| Video Output | Compatible with NTSC and PAL formats | |
| Lens Mount | PENTAX 645AF2 bayonet mount | |
| Usable Lens | PENTAX 645AF2, 645AF, and 645A mount lenses | |
| Dimensions | approx. 156(W) x 117(H) x 119(D)mm (6.1 x 4.6 x 4.7 inches) | |
| Weight | approx. 1480 g (52.2 oz.) loaded and ready with battery and two SD memory cards approx. 1400 g (49.4 oz.) without battery and SD memory card. |
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| Bundle software | PENTAX Digital Camera Utility 4 (Ver.4.20) | |