| Processor | PRIME IV | PRIME III | PRIME III |
| Exposure Modes | Auto (green), HyP, Sv, Av, Tv, TAv, HyM, X, B, User(5) | HyP, Sv, Av, Tv, TAv, HyM, X, B | Auto (green), HyP, Sv, Av, Tv, TAv, HyM, X, B, User(3) |
| Program Modes | Auto, Normal, Action, Depth of Field (deep/shallow), MTF priority | Auto, Normal, Action, Depth of field (deep/shallow), MTF | Auto, Normal, Action, Depth of Field (deep/shallow), MTF priority |
| Scene Modes | None. Auto (green) sets exposure based on scene analysis | None | None |
| Restrictions | Exposure modes with M and K lenses are restricted to Av (with aperture always wide open) and M (with stop-down metering) | | Exposure modes with M and K lenses are restricted to Av (with aperture always wide open) and M (with stop-down metering) |
| Shutter Speeds (Auto) | 30s - 1/8000s (stepless) | 30s - 1/4000s (stepless) | 30s - 1/8000s (stepless) |
| Shutter Speeds (Manual) | B, 30s - 1/8000s. Up to 20 minutes in Timed Bulb mode. Up to 300s in Astrotracer mode | B, 30s - 1/4000s | B, 30s - 1/8000s. Up to 300s in Astrotracer mode |
| High ISO NR | Off, Auto, Low/Medium/High, Custom by ISO | | Off, Auto, Low/Medium/High, Custom by ISO |
| Slow Shutter NR | Off, Auto, On | | Off, Auto, On |
| Shutter Life | 300,000 | 100,000 | 200,000 |
| Maximum FPS | 4.4 (6.5 in crop mode) | 3 | 8.3 |
| Continuous Shooting | Full frame: H: 4.4 fps (70 JPG, 17 RAW) M: 3.0 fps (100 JPG, 20 RAW) L: 0.7 fps (100 JPG, 100 RAW)
APS-C crop: H: 6.5 fps (100 JPG, 50 RAW) M: 3.0 fps (100 JPG, 70 RAW) L: 1.0 fls (100 JPG, 100 RAW) | Hi: 3 fps up to 30 JPG or 10 RAW frames Lo: 1 fps up to 300 JPG or 25 RAW frames | Hi: 8.3 fps up to approx. 60 frames (JPG), up to approx. 23 frames (RAW), M: 4.5 fps up to approx 100 frames (JPG), 32 frames (RAW), Lo: 3 fps uup to approx. 200 frames (JPG), up to appox. 52 frames (RAW) |
| Exposure Compensation | +/-5 EV (+/-2 EV in movie mode) | +/-5 EV (+/- 2 EV in movie mode) | +/-5 EV (+/-2 EV in movie mode) |
| Auto Bracketing | Exposure (2, 3 or 5 frames), one-push EV bracketing, AA filter (3 frames) | Exposure (2, 3 or 5 frames), one-push EV bracketing | Exposure (2, 3 or 5 frames), one-push EV bracketing, AA filter (3 frames) |
| Expanded Dynamic Range | Highlight (auto, on, off),
Shadow (auto, high, medium, low, off) | Highlight (auto, on, off),
Shadow (auto, high, medium, low, off) | Highlight (auto, on, off),
Shadow (auto, high, medium, low, off) |
| Metering Sensor | 86K Pixel | 86K Pixel | 86K Pixel |
| Meter Range | -3 to 20 EV | -1 to 21 EV | -3 to 20 EV |
| Meter Pattern | Multi-Segment,Center Weighted,Spot | Multi-Segment,Center Weighted,Spot | Multi-Segment,Center Weighted,Spot |
| Exposure Lock | Yes | Yes | Yes |
| Self Timer | 2 s with mirror lock-up, 12 s | 2 s and 12 s | 2 s with mirror lock-up, 12 s |
| Interval Shooting | Up to 2000 frames, 2 sec to 24 hours interval | Up to 2000 frames, 2 sec to 24 hours interval | Up to 2000 frames, 2 sec to 24 hours interval |
| Mirror Lock-up | Yes | Yes | Yes |
| HDR Mode | Yes | Yes | Yes |
| Multiple Exposures | Yes, average, additive and bright, 2 to 2000 shots | Yes, average, additive and bright, 2 to 2000 shots | Yes, average, additive and bright, 2 to 2000 shots |
| Pixel Mapping | Yes | Yes | Yes |
| Mount | KAF2 (no aperture coupler) | 645 AF2 | KAF2 (no aperture coupler) |
| Composition Adjustment | Yes | No | Yes |
| Supported Lenses | All Pentax K-mount lenses. Support for lenses with the KAF4 mount variant requires a firmware update. Manual focus only with K-, M-, and A-series lenses. Stop down metering only with K- and M-series lenses. M42, Pentax 645 and Pentax 6x7 lenses with the appropriate adapters: green button stop down metering and manual focus only. | All Pentax 645 lenses. Pentax 6x7 lenses with adapter (retains open aperture metering) | All Pentax K-mount lenses. Support for lenses with the KAF4 mount variant requires a firmware update. Manual focus only with K-, M-, and A-series lenses. Stop down metering only with K- and M-series lenses. M42, Pentax 645 and Pentax 6x7 lenses with the appropriate adapters (stop down metering and manual focus only). |
| Stabilization | Yes (sensor-shift SR II) | No (select lenses stabilized) | Yes (sensor-shift SR) |
| Autofocus (viewfinder) | Yes (SAFOX 12, 33 focus points, 25 cross type) | Yes (SAFOX 11, 27 focus points (25 cross type)) | Yes (SAFOX 11, 27 focus points (25 cross type)) |
| AF Points | 33 | 27 | 27 |
| Autofocus Sensitivity | -3 to 18 EV | -3 to 18 EV | -3 to 18 EV |
| Autofocus With SDM | Yes | Yes | Yes |
| Autofocus Assist | Dedicated LED | N/A | Dedicated LED |
| Autofocus Modes | Single Shot, Continuous, Auto, Expanded area (S, M, L), Zone select, User select | | Single Shot, Continuous, Auto, Expanded area (S, M, L), Zone select, User select, Manual focus |
| Front/Back Focus Corr | Yes (adjustment for up to 20 lenses) | Yes (adjustment for up ro 20 lenses) | Yes (adjustment for up to 20 lenses) |
| Power Zoom | Supported (zoom only) | Not supported | Supported (zoom only) |
| Lens Correction | Distortion,Lateral Chromatic Aberration,Vignetting,Diffraction | Distortion,Lateral Chromatic Aberration,Vignetting,Diffraction | Distortion,Lateral Chromatic Aberration,Vignetting,Diffraction |
| Video/Movie Mode | 1920x1080 (16:9 Full HD) at 60i, 50i, 30p, 25p and 24p,
1280x720 (16:9) at 60p, 50p
MPEG4 AVC/H.264
Interval Movie (4K, Full HD, HD)
Star Stream | 1920x1080 (16:9 Full HD) at 60, 30, 25 and 24 fps,
1280x720 (16:9 HD) at 60, 30, 25 and 24 fps,
MPEG4 AVC/H.264,
Interval Movie (4K, Full HD, HD) | 1920x1080 (16:9 Full HD) at 60i, 50i, 30p, 25p and 24p fps,
1280x720 (16:9) at 60p, 50p, 30p, 25p and 24p fps,
MPEG4 AVC/H.264,
Interval Movie (4K, Full HD, HD) |
| Video Stabilization | Electronic | Electronic | Electronic |
| Exposure Modes | P, Av, TAv, Tv, M | P, Av, TAv, M | P, Av, TAv, Tv, M |
| Movie Mode Restrictions | Clips up to 4 GB / 25 minutes | | Clips up to 4 GB / 25 minutes |
| AF During Recording | On-Demand | On-Demand | On-Demand |
| Sound In Movie Mode | Stereo (external mic), Stereo (built-in mic). Adjustable sound level | Stereo (external mic), Stereo (built-in mic), Adjustable sound level | Stereo (external mic), Mono (built-in mic). Adjustable sound level |
| Weather Resistant | Yes | Yes | Yes |
| GPS | Built-In | Via Accessory | Built-In |
| Control Wheels | 3 | 2 | 2 |
| Camera Controls | 2 traditional e-dials and 1 settings dial/control wheel. Many dedicated buttons. Customizable control panel. Five user mode settings. Customizable Fx1 & Fx2 button. | 2 control wheels Many dedicated buttons Control panel Three user mode settings | 2 control wheels. Many dedicated buttons. Control panel. Three user mode settings |
| Dust Removal | Yes, Ultrasonic DR II | Yes, Ultrasonic DR II | Yes, Ultrasonic DR II |
| Dust Alert | No | Yes | Yes |
| File Format | PEF (RAW),DNG (RAW),JPG,MOV | PEF (RAW),DNG (RAW),JPG,TIFF,MOV | PEF (RAW),DNG (RAW),JPG,MOV |
| Card Slots | 2 | 2 | 2 |
| Memory Card Type | SD, SDHC, SDXC (UHS-I Compatible) | SD, SDHC, SDXC (UHS-I Compatible), Eye-Fi, Flucard | SD, SDHC, SDXC (UHS-I Compatible), Eye-Fi, Flucard |
| Tethering | Wired (native),Via built-in Wi-Fi | Wired (native),Via O-FC1 FLUcard | Via O-FC1 FLUcard |
| Battery | D-LI90 Rechargeable | D-LI90 lithium-ion rechargeable | D-LI90 lithium-ion rechargeable |
| Battery Grip | D-BG6 (takes D-LI90 or 6x AA)
|
No
| D-BG5 (takes D-LI90 or 6x AA)
|
| Battery Life | 760 images, playback time: 390 minutes | 650 images | 720 images Video playback time: 370 minutes |
| Size (W X H X D) | 136.5 x 110.0 x 85.5 mm | 156mm x 117mm x 123mm | 131.5 x 102.5 x 77.5 mm |
| Weight | 925g (1010 with battery and SD cards) | 1550 g | 700 g (785 g with battery and SD card) |
| Connectivity | USB 2, HDMI out, stereo mic, headphones, DC in, X-sync, cable release, GPS, Wi-Fi. | USB3, HDMI out, X-Sync, head phones, microphone, cable release, DC in | USB 3, HDMI out, stereo mic, headphones, DC in, X-sync, cable release |
| Latest Firmware | Link to download page | Link to Download Page | Link to Download Page |
| Notes | Astrotracer functionality with the built in GPS,
Buttons, top LCD, and card and connectivity doors can be illuminated
Electronic level,
Embed copyright information in EXIF,
GPS and electronic compass,
High ISO NR, can be customized for each major ISO value,
Image plane indicator,
In-camera RAW development,
Moiré suppression via SR mechanism,
Moiré suppression bracketing,
Save last JPG as RAW,
Save JPG from movie,
Several buttons are customizable,
The function selector plus third control wheel provides a short cut to a variety of settings | Electronic level,
Embed copyright information in EXIF,
High ISO NR can be customized for each major ISO value,
Image plane indicator,
In-camera RAW development,
Save last JPG as RAW,
Save JPG from movie,
The RAW button is customizable | Astrotracer functionality with the built in GPS,
Electronic level,
Embed copyright information in EXIF,
GPS and electronic compass,
High ISO NR, can be customized for each major ISO value,
Image plane indicator,
In-camera RAW development,
Moiré suppression via SR mechanism,
Moiré suppresion bracketing,
Save last JPG as RAW,
Save JPG from movie,
The RAW button is customizable and can perform a variety of functions, hereunder exposure bracketing. |
| Colors / Special Editions |
Black (standard) and Silver (limited quantity)
|
645Z IR
|
Black, Limited Silver
|
