In depth comparison and review of Pentax K-S1 and Canon EOS R3. 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 | Canon EOS R3 |
|---|
| Product Type | Digital camera - 1080p - SLR with Live View mode, movie recording | Digital camera - 6K - mirrorless system with Live View mode, movie recording |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 9.3 cm | 14.26 cm |
| Width | 12 cm | 15 cm |
| Depth | 7 cm | 8.72 cm |
| Weight | 485 g | 822 g |
| Weight Details | - | Camera body only: 822 g Camera with battery and memory card: 1.015 kg |
| Body Material | - | Magnesium alloy, fibreglass-reinforced polycarbonate |
| Enclosure Colour | White | Black | - |
| Protection | - | Dust-resistant, slash-resistant |
| Navigation | - | GPS/GLONASS/QZSS receiver |
| SENSOR | Pentax K-S1 | Canon EOS R3 |
|---|
| Sensor Resolution | 20.12 Megapixel | 24.1 Megapixel |
|---|---|---|
| Optical Sensor Type | CMOS | BSI-CMOS |
| Total Pixels | 20,420,000 pixels | 24,100,000 pixels |
| Effective Sensor Resolution | 20,120,000 pixels | 26,700,000 pixels |
| Optical Sensor Size | APS-C (23.5 x 15.6 mm) | Full Frame (36 x 24 mm) |
| Frame Rate (Max Resolution) | - | 60 fps |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Special Protect (SP) coating | Self Cleaning Sensor Unit |
| Image Stabiliser | - | Optical (5-axis image sensor shift mechanism) |
| Built-in Optical Image Stabiliser | - | Yes |
| PROCESSOR | Pentax K-S1 | Canon EOS R3 |
|---|
| Image Processor | PRIME MII | DIGIC X |
|---|
| LENS | Pentax K-S1 | Canon EOS R3 |
|---|
| Lens Mounting Type | Pentax KAF2 | Canon RF |
|---|
| FOCUSING | Pentax K-S1 | Canon EOS R3 |
|---|
| Auto Focus | TTL phase detection | Dual Pixel CMOS AF II |
|---|---|---|
| Auto Focus Points (Zones) Qty | 11 | 1053 |
| AE/AF Control | Face-priority AF, Subject-tracking AF | Eye Control, Face-priority AF, Subject-tracking AF, Eye detection AF, Zone AF, Animal-tracking AF, Vehicle-tracking AF |
| Face Detection | Yes | Eye Detect AF, Face Detection AF/AE |
| VIEWFINDER | Pentax K-S1 | Canon EOS R3 |
|---|
| Viewfinder Type | Optical - fixed eye-level pentaprism | Electronic - OLED |
|---|---|---|
| Viewfinder Colour Support | - | Colour |
| Viewfinder Diagonal Size | - | 0.5" |
| Viewfinder Resolution | - | 5,760,000 pixels |
| Optical Viewfinder Field Coverage | 100% | 100% |
| Optical Viewfinder Magnification | 0.95x | 0.76x |
| Optical Viewfinder Dioptric Correction Range | -2.5 to +1.5 | -4 to +2 |
| Field of View Crop Factor | - | 1.0 |
| EXPOSURE & WHITE BALANCE | Pentax K-S1 | Canon EOS R3 |
|---|
| ISO (Max) | 51200 | 204800 |
|---|---|---|
| Native ISO | 100-51200 | 100-102400 |
| Extended ISO (Max) | - | 204800 |
| Extended ISO (Min) | - | 50 |
| Light Sensitivity | ISO 100-51200, ISO auto (100-51200) | ISO 50, ISO auto, ISO 204800, ISO 100-102400 |
| Exposure Metering | Multi-segment, centre-weighted, spot | Evaluative, centre-weighted, spot (2.9%), partial (5.9%) |
| Exposure Metering Zones | 77 | 384 |
| Exposure Modes | Programme, automatic, manual, aperture-priority, shutter-priority, shutter & aperture priority | Programme, bulb, automatic, manual, aperture-priority, shutter-priority, flexible-priority AE |
| Bracketing Modes | - | Focus 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 | Neutral, Faithful, monochrome, landscape, portrait, Standard, Fine Detail |
| 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) | Cloudy, tungsten light, Flash, daylight, shade, 2500K - 10000K, fluorescent light (white) |
| Shutter Type | Mechanical electronically-controlled | Mechanical, electronic |
| Max Shutter Speed | 1/6000 sec | 1/64000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1/2 or 1/3 EV steps | ±3 EV range, in 1/2 or 1/3 EV steps |
| Auto Exposure Bracketing | - | 3 steps in 1/2 or 1/3 EV steps |
| White Balance Bracketing | Yes | - |
| X-sync Speed | 1/180 sec | 1/200sec, 1/180 sec, 1/250sec |
| Exposure Range | EV 0-22 (ISO 100) | EV -3-20 (ISO 100) |
| DISPLAY | Pentax K-S1 | Canon EOS R3 |
|---|
| Type | 3" LCD display | 3.2" LCD display |
|---|---|---|
| Display Format | 921,000 pixels | 4,150,000 pixels |
| Display Form Factor | Built-in | Rotating |
| Display Features | Colour control, display brightness control | Display brightness control, anti-smudge coating |
| FLASH | Pentax K-S1 | Canon EOS R3 |
|---|
| 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 | Canon EOS R3 |
|---|
| Digital Video Format | H.264 | MOV, RAW, IPB, ALL-I |
|---|---|---|
| Image Recording Format | JPEG, DNG (RAW) + JPEG, DNG (RAW) | JPEG, RAW, RAW + JPEG, C-RAW, HEIF, RAW + HEIF |
| Max Video Resolution | 1920 x 1080 | 6000 x 3164 |
| Microphone Operation Mode | Mono | Mono |
| Microphone Features | Sensitivity control | - |
| MEMORY | Pentax K-S1 | Canon EOS R3 |
|---|
| Memory Card Slot | SD card | SD card, CFexpress |
|---|---|---|
| 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-II Memory Card, SDXC UHS-II Memory Card, CFexpress |
| Memory Card Included | - | No |
| Image Storage | - | 6000 x 4000 3984 x 2656 2976 x 1984 2400 x 1600 3744 x 2496 2400 x 1600 5328 x 4000 3552 x 2664 2656 x 1992 2112 x 1600 6000 x 3368 3984 x 2240 2976 x 1680 2400 x 1344 4000 x 4000 2656 x 2656 1984 x 1984 1600 x 1600 |
| Video Capture | H.264 - 1920 x 1080 - 30 fps H.264 - 1920 x 1080 - 25 fps H.264 - 1920 x 1080 - 24 fps |
RAW - 6000 x 3164 p 4096 x 2160 p 3840 x 2160 p 1920 x 1080 p |
| BATTERY AND CHARGING | Pentax K-S1 | Canon EOS R3 |
|---|
| Battery Type | Pentax D-Li109 Lithium Ion | Canon LP-E19 Lithium Ion |
|---|---|---|
| Details | Pentax D-Li109 Li-ion rechargeable battery (included) | Canon LP-E19 Li-ion rechargeable battery (included) |
| Battery Life | Photo shooting - 480 shots (50% flash usage) Playback - 4.5 hours |
Photo shooting - 620 shots (Power Save LVF Shooting mode) Photo shooting - 860 shots (Power Save LCD Shooting mode) Photo shooting - 440 shots (EVF on) Photo shooting - 760 shots (LCD Monitor on) |
| CONNECTIONS | Pentax K-S1 | Canon EOS R3 |
|---|
| Interface | HDMI | HDMI, USB-C, IEEE 802.11a/b/g/n/ac, Bluetooth 5.0 |
|---|---|---|
| Connectivity Features | - | Remote control via mobile devices, remote live view, Wireless Image Transfer, wireless video upload to cloud server, wireless image upload to cloud server, wireless image printing |
| Print Standard | DPOF support, Exif Print support | DPOF support, Exif Print support |
| Computer Connectivity | - | Mac, Windows |
| Flash Terminal | Hot shoe | Hot shoe |
| Connector Type | USB 2.0 HDMI output (19 pin micro HDMI Type D) |
USB 3.2 Gen 2 (USB Type-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) Network (RJ-45) |
| FEATURES | Pentax K-S1 | Canon EOS R3 |
|---|
| Self-Timer Delay | 2sec, 12sec | 10 sec, 2sec |
|---|---|---|
| Continuous Shooting Speed | 3 frames per second, 5.4 frames per second | 30 frames per second, 12 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, auto power save, depth-of-field preview button, camera orientation detection, histogram display, AE lock, AF lock, cropping an image, resizing an image, highlight point display, Dust Delete Data system, USB charging, in-camera RAW processing, Multi-Frame Noise Reduction, HDR image enhancement technology, high-speed recording, silent shooting, slow motion recording, multiple exposure capture, anti-flicker, double slot recording, Flickering Reduction function, firmware upgradable, assignable buttons, HEIF to Jpeg conversion, voice memo recording |
| OTHERS | Pentax K-S1 | Canon EOS R3 |
|---|
| Included Accessories | Battery charger, body cap, shoulder strap, eyecup, shoe cap | Battery charger, body cap, neck strap, eyecup, cable protector, hot shoe cover, USB-C cable |
|---|---|---|
| Software | Drivers & Utilities | Canon Picture Style Editor, Canon Digital Photo Professional 4.15, Canon EOS Utility 3, WFT Utility, EOS Lens Registration Tool, EOS Web Service Registration Tool, Canon Camera connect app, Mobile File Transfer app |
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | -10 °C | 0 °C |
| Service & Support | - | Limited warranty - 1 year |
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