In depth comparison and review of Pentax K-S1 and Pentax 645Z. Compare design, sensors, proximity features, memory capacities and other important specifications and features to easily choose the right camera for you. Our goal is to help you uncover differences between the products and find the digital camera that will best fit your needs.
| DESIGN AND DIMENSIONS | Pentax K-S1 | Pentax 645Z |
|---|
| Product Type | Digital camera - 1080p - SLR with Live View mode, movie recording | Digital camera - 1080p - SLR with Live View mode, movie recording |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 9.3 cm | 11.7 cm |
| Width | 12 cm | 15.6 cm |
| Depth | 7 cm | 12.3 cm |
| Weight | 485 g | 1.47 kg |
| Weight Details | - | Camera body only: 1.47 kg Camera with battery and memory card: 1.55 kg |
| Enclosure Colour | White | Black | - |
| Protection | - | Dust-resistant, water-resistant |
| SENSOR | Pentax K-S1 | Pentax 645Z |
|---|
| Sensor Resolution | 20.12 Megapixel | 51.4 Megapixel |
|---|---|---|
| Optical Sensor Type | CMOS | CMOS |
| Total Pixels | 20,420,000 pixels | 52,990,000 pixels |
| Effective Sensor Resolution | 20,120,000 pixels | 51,400,000 pixels |
| Optical Sensor Size | APS-C (23.5 x 15.6 mm) | - |
| Frame Rate (Max Resolution) | - | 30 fps |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Special Protect (SP) coating | Dust Reduction (image sensor vibration) |
| PROCESSOR | Pentax K-S1 | Pentax 645Z |
|---|
| Image Processor | PRIME MII | - |
|---|
| LENS | Pentax K-S1 | Pentax 645Z |
|---|
| Lens Mounting Type | Pentax KAF2 | Pentax 645AF |
|---|
| FOCUSING | Pentax K-S1 | Pentax 645Z |
|---|
| Auto Focus | TTL phase detection | TTL contrast and phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 11 | 27 |
| AE/AF Control | Face-priority AF, Subject-tracking AF | - |
| Face Detection | Yes | - |
| VIEWFINDER | Pentax K-S1 | Pentax 645Z |
|---|
| Viewfinder Type | Optical - fixed eye-level pentaprism | Optical - trapezoid prism |
|---|---|---|
| Optical Viewfinder Field Coverage | 100% | 98% |
| Optical Viewfinder Magnification | 0.95x | 0.62x |
| Optical Viewfinder Dioptric Correction Range | -2.5 to +1.5 | -3.5 to +2 |
| Field of View Crop Factor | - | 1.3 |
| EXPOSURE & WHITE BALANCE | Pentax K-S1 | Pentax 645Z |
|---|
| ISO (Max) | 51200 | 204800 |
|---|---|---|
| Native ISO | 100-51200 | 100-204800 |
| Light Sensitivity | ISO 100-51200, ISO auto (100-51200) | ISO auto (100-204800), ISO 100-248000 |
| Exposure Metering | Multi-segment, centre-weighted, spot | Multi-segment, centre-weighted, spot |
| Exposure Metering Zones | 77 | - |
| Exposure Modes | Programme, automatic, manual, aperture-priority, shutter-priority, shutter & aperture priority | Programme, bulb, manual, aperture-priority, shutter-priority, ISO priority, shutter & aperture priority |
| Shooting Programs | Landscape, portrait mode, macro, museum, surf & snow, PET, Blue Sky, food, night scene, sunset, candle, night snapshot, night scene with portrait, kids, Stage, night scene HDR, moving object, forest, backlight silhouette | - |
| Special Effects | Natural, bright, Vibrant, monochrome, Muted, landscape, portrait, Cross Process, Bleach Bypass, Radiant, Reversal Film, Tone Expansion, Cold vintage, Colour Fade, Bold Monochrome, Unicolour Bold, Clear Tone, Warm Fade, Brilliant Colour, Infrared Filter | Natural, bright, Vibrant, monochrome, Muted, landscape, portrait, Cross Process, Bleach Bypass, Radiant, Reversal Film |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Cloudy, tungsten light, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (warm white), Color Temperature Enhancement (CTE), fluorescent light (daylight colour), fluorescent light (daylight white) | Tungsten light, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (warm white), fluorescent light (daylight colour), fluorescent light (daylight white) |
| Shutter Type | Mechanical electronically-controlled | Electronic |
| Max Shutter Speed | 1/6000 sec | 1/4000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1/2 or 1/3 EV steps | ±5 EV range, in 1/2 or 1/3 EV steps |
| White Balance Bracketing | Yes | - |
| X-sync Speed | 1/180 sec | 1/125sec |
| Exposure Range | EV 0-22 (ISO 100) | EV -1-21 (ISO 200) |
| DISPLAY | Pentax K-S1 | Pentax 645Z |
|---|
| Type | 3" LCD display | 3.2" LCD display |
|---|---|---|
| Display Format | 921,000 pixels | 1,037,000 pixels |
| Display Form Factor | Built-in | Folding |
| Display Features | Colour control, display brightness control | Display brightness control, display colour control |
| FLASH | Pentax K-S1 | Pentax 645Z |
|---|
| Camera Flash | Pop-up flash | - |
|---|---|---|
| Guide Number (m / ISO 100) | 10 | - |
| Flash Modes | Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction | - |
| Red-Eye Reduction | Yes | - |
| Features | AF illuminator, flash +/- compensation | - |
| VIDEOGRAPHY / CAMCORDER | Pentax K-S1 | Pentax 645Z |
|---|
| Digital Video Format | H.264 | MJPEG, H.264 |
|---|---|---|
| Image Recording Format | JPEG, DNG (RAW) + JPEG, DNG (RAW) | JPEG, RAW, RAW + JPEG |
| Max Video Resolution | 1920 x 1080 | 1920 x 1080 |
| Microphone Operation Mode | Mono | - |
| Microphone Features | Sensitivity control | - |
| MEMORY | Pentax K-S1 | Pentax 645Z |
|---|
| Memory Card Slot | SD card | Dual SD card |
|---|---|---|
| Supported Memory Cards | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDXC UHS-I Memory Card | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card |
| Memory Card Included | - | No |
| Video Capture | H.264 - 1920 x 1080 - 30 fps H.264 - 1920 x 1080 - 25 fps H.264 - 1920 x 1080 - 24 fps |
- |
| BATTERY AND CHARGING | Pentax K-S1 | Pentax 645Z |
|---|
| Battery Type | Pentax D-Li109 Lithium Ion | Pentax D-Li90 Lithium Ion |
|---|---|---|
| Details | Pentax D-Li109 Li-ion rechargeable battery (included) | Pentax D-Li90 Li-ion rechargeable battery (included) |
| Battery Life | Photo shooting - 480 shots (50% flash usage) Playback - 4.5 hours |
Photo shooting - 650 shots Playback - 6.67 hours |
| CONNECTIONS | Pentax K-S1 | Pentax 645Z |
|---|
| Interface | HDMI | HDMI, USB 3.0 |
|---|---|---|
| Print Standard | DPOF support, Exif Print support | - |
| Flash Terminal | Hot shoe | Hot shoe |
| Connector Type | USB 2.0 HDMI output (19 pin micro HDMI Type D) |
USB 3.0 (24 pin Micro-USB-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) DC power input |
| FEATURES | Pentax K-S1 | Pentax 645Z |
|---|
| Self-Timer Delay | 2sec, 12sec | 2sec, 12sec |
|---|---|---|
| Continuous Shooting Speed | 3 frames per second, 5.4 frames per second | 3 frames per second, 4.5 frames per second |
| HDR Mode | Auto HDR mode | - |
| Additional Features | RGB primary colour filter, depth-of-field preview button, digital image rotation, camera orientation detection, histogram display, AE lock, AF lock, cropping an image, resizing an image, saturation control, in-camera film editing, in-camera RAW processing, HDR image enhancement technology, hue control, Eye-Fi Card Ready, LED body illumination | RGB primary colour filter, interval shooting mode, peripheral illumination correction, Eye-Fi Card Ready, NR Slow Shutter, High ISO NR, Lateral Chromatic Aberration Correction, distortion correction function, anti-aliasing filter simulator, diffraction correction |
| OTHERS | Pentax K-S1 | Pentax 645Z |
|---|
| Included Accessories | Battery charger, body cap, shoulder strap, eyecup, shoe cap | Carrying strap, battery charger, body cap, eyecup, shoe cap |
|---|---|---|
| Software | Drivers & Utilities | Drivers & Utilities |
| Max Operating Temperature | 40 °C | - |
| Min Operating Temperature | -10 °C | - |
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