In depth comparison and review of Sony Alpha7s ILCE-7S and Pentax K-S1. 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 | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Product Type | Digital camera - 1080p - mirrorless system | Digital camera - 1080p - SLR with Live View mode, movie recording |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 9.44 cm | 9.3 cm |
| Width | 12.69 cm | 12 cm |
| Depth | 4.82 cm | 7 cm |
| Weight | 446 g | 485 g |
| Body Material | Magnesium alloy | - |
| Enclosure Colour | Black | White | Black |
| SENSOR | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Sensor Resolution | 12.2 Megapixel | 20.12 Megapixel |
|---|---|---|
| Optical Sensor Type | Exmor CMOS | CMOS |
| Total Pixels | 12,400,000 pixels | 20,420,000 pixels |
| Effective Sensor Resolution | 12,200,000 pixels | 20,120,000 pixels |
| Optical Sensor Size | Full Frame (35.8 x 23.9 mm) | APS-C (23.5 x 15.6 mm) |
| Frame Rate (Max Resolution) | 60 fps | - |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Dust Reduction (image sensor vibration), Anti-Dust coating | Special Protect (SP) coating |
| PROCESSOR | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Image Processor | BIONZ X | PRIME MII |
|---|
| LENS | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Lens Mounting Type | Sony E-mount | Pentax KAF2 |
|---|
| FOCUSING | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Auto Focus | TTL contrast detection | TTL phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 25 | 11 |
| AE/AF Control | - | Face-priority AF, Subject-tracking AF |
| Face Detection | - | Yes |
| VIEWFINDER | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Viewfinder Type | Electronic - OLED | Optical - fixed eye-level pentaprism |
|---|---|---|
| Viewfinder Colour Support | Colour | - |
| Viewfinder Diagonal Size | 0.5" | - |
| Viewfinder Resolution | 2,359,296 pixels | - |
| Optical Viewfinder Field Coverage | 100% | 100% |
| Optical Viewfinder Magnification | 0.71x | 0.95x |
| Optical Viewfinder Dioptric Correction Range | -4 to +3 | -2.5 to +1.5 |
| Features | Viewfinder brightness control | - |
| EXPOSURE & WHITE BALANCE | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| ISO (Max) | 409600 | 51200 |
|---|---|---|
| Native ISO | - | 100-51200 |
| Extended ISO (Max) | 409600 | - |
| Extended ISO (Min) | 50 | - |
| Light Sensitivity | ISO 50, ISO 100-409600 | ISO 100-51200, ISO auto (100-51200) |
| Exposure Metering | Multi-segment, centre-weighted, spot | Multi-segment, centre-weighted, spot |
| Exposure Metering Zones | 1200 | 77 |
| Exposure Modes | Programme, bulb, automatic, manual, aperture-priority, shutter-priority | Programme, automatic, manual, aperture-priority, shutter-priority, shutter & aperture priority |
| Bracketing Modes | Dynamic Range Bracketing | - |
| 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 |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Incandescent, cloudy, daylight, shade, fluorescent light (cool white), fluorescent light (warm white), Underwater, 2500K - 9900K, fluorescent light (daylight colour), fluorescent light (daylight white) | 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) |
| Shutter Type | Mechanical electronically-controlled | Mechanical electronically-controlled |
| Max Shutter Speed | 1/8000 sec | 1/6000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | - | ±5 EV range, in 1/2 or 1/3 EV steps |
| Auto Exposure Bracketing | 3 or 5 steps | - |
| White Balance Bracketing | Yes | Yes |
| X-sync Speed | - | 1/180 sec |
| Exposure Range | EV -3-20 (ISO 100) | EV 0-22 (ISO 100) |
| DISPLAY | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Type | 3" LCD display | 3" LCD display |
|---|---|---|
| Display Format | 921,600 pixels | 921,000 pixels |
| Display Form Factor | Folding | Built-in |
| Display Features | Display brightness control | Colour control, display brightness control |
| FLASH | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| 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 | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Digital Video Format | AVCHD, H.264, XAVC S | H.264 |
|---|---|---|
| Image Recording Format | JPEG, RAW, RAW + JPEG | JPEG, DNG (RAW) + JPEG, DNG (RAW) |
| Max Video Resolution | 1920 x 1080 | 1920 x 1080 |
| Surround Sound | Dolby Digital AC-3 (2 channel) recording | - |
| Microphone Operation Mode | Stereo | Mono |
| Microphone Features | - | Sensitivity control |
| MEMORY | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Memory Card Slot | Memory Stick PRO Duo card, SD card | SD card |
|---|---|---|
| Supported Memory Cards | SD Memory Card, Memory Stick PRO Duo, SDXC Memory Card, SDHC Memory Card, Memory Stick PRO-HG Duo, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, Memory Stick XC-HG Duo | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDXC UHS-I Memory Card |
| Image Storage | JPEG 4240 x 2832 JPEG 2768 x 1848 JPEG 2128 x 1416 JPEG 1376 x 920 JPEG 4240 x 2384 JPEG 2768 x 1560 JPEG 2128 x 1200 JPEG 1376 x 776 |
- |
| Video Capture | XAVC S - 1920 x 1080 - 50Mbps XAVC S - 1280 x 720 - 50Mbps AVCHD - 1920 x 1080 - 28Mbps AVCHD - 1920 x 1080 - 24Mbps AVCHD - 1920 x 1080 - 17Mbps AVCHD - 1920 x 1080 - 24Mbps AVCHD - 1920 x 1080 - 17Mbps H.264 - 1440 x 1080 - 12Mbps H.264 - 640 x 480 - 3Mbps |
H.264 - 1920 x 1080 - 30 fps H.264 - 1920 x 1080 - 25 fps H.264 - 1920 x 1080 - 24 fps |
| BATTERY AND CHARGING | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Battery Type | Sony NP-FW50 Lithium Ion | Pentax D-Li109 Lithium Ion |
|---|---|---|
| Details | Sony NP-FW50 Li-ion rechargeable battery - 1080 mAh (included) | Pentax D-Li109 Li-ion rechargeable battery (included) |
| Battery Life | Photo shooting - 360 shots | Photo shooting - 480 shots (50% flash usage) Playback - 4.5 hours |
| CONNECTIONS | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Interface | Composite video/audio, HDMI, USB 2.0, Wireless LAN, NFC (Near Field Communication) | HDMI |
|---|---|---|
| Print Standard | Direct print, Exif Print support, PictBridge support | DPOF support, Exif Print support |
| Flash Terminal | Hot shoe | Hot shoe |
| Connector Type | USB 2.0 HDMI output Composite video/audio output Microphone Headphones |
USB 2.0 HDMI output (19 pin micro HDMI Type D) |
| FEATURES | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Self-Timer Delay | 10 sec, 2sec | 2sec, 12sec |
|---|---|---|
| Continuous Shooting Speed | 2.5 frames per second, 5 frames per second | 3 frames per second, 5.4 frames per second |
| HDR Mode | - | Auto HDR mode |
| Additional Features | Built-in speaker, RGB primary colour filter, histogram display, Sweep Panorama technology, Dynamic Range Optimizer, peripheral illumination correction, Dolby Digital Stereo Creator, Chromatic Aberration Compensation (CAC), high-speed recording, Superior Auto mode, BRAVIA Sync function, PhotoTV HD, distortion correction function, Clean HDMI output for 4K movies | 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 |
| OTHERS | Sony Alpha7s ILCE-7S | Pentax K-S1 |
|---|
| Included Accessories | Body cap, shoulder strap, additional battery, micro-USB cable, 2 battery chargers, 2 battery packs | Battery charger, body cap, shoulder strap, eyecup, shoe cap |
|---|---|---|
| Software | Sony PlayMemories Home, Sony Image Data Converter 4.0 | Drivers & Utilities |
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | 0 °C | -10 °C |
| Service & Support | Limited warranty - parts and labour - 2 years | - |
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