In depth comparison and review of Nikon D3100 + AF-S VR DX 18-55mm 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 | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Product Type | Digital camera - 1080p - SLR with Live View mode, movie recording | Digital camera - 1080p - SLR with Live View mode, movie recording |
|---|---|---|
| Lens Included | AF-S VR DX 18-55mm lens | Body only |
| Height | 9.6 cm | 9.3 cm |
| Width | 12.4 cm | 12 cm |
| Depth | 7.5 cm | 7 cm |
| Weight | 455 g | 485 g |
| Enclosure Colour | Black | Red | White | Black |
| Optical Zoom | 3x | - |
| SENSOR | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Sensor Resolution | 14.2 Megapixel | 20.12 Megapixel |
|---|---|---|
| Optical Sensor Type | CMOS | CMOS |
| Total Pixels | 14,800,000 pixels | 20,420,000 pixels |
| Effective Sensor Resolution | 14,200,000 pixels | 20,120,000 pixels |
| Optical Sensor Size | APS-C (23.1 x 15.4 mm) | APS-C (23.5 x 15.6 mm) |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Air flow control system, Self Cleaning Sensor Unit | Special Protect (SP) coating |
| Image Stabiliser | Optical | - |
| PROCESSOR | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Image Processor | EXPEED 2 | PRIME MII |
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| LENS | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Type | Zoom lens - 3x zoom - 18 - 55 mm - f/3.5-5.6 G Nikon AF-S DX VR | - |
|---|---|---|
| Focal Length Equivalent to 35mm Camera | 27 - 82.5mm | - |
| Focus Adjustment | Automatic, manual | - |
| Min Focus Distance | 28 cm | - |
| Max View Angle | 76 degree(s) | - |
| Zoom Adjustment | Manual | - |
| Lens Construction | 8 groups / 11 elements | - |
| Filter Size | 52 mm | - |
| Lens Mounting Type | Nikon F | Pentax KAF2 |
| Features | Silent Wave Motor (SWM), aspherical lens, VR (Vibration Reduction) | - |
| FOCUSING | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Auto Focus | TTL contrast and phase detection | TTL phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 11 | 11 |
| AE/AF Control | - | Face-priority AF, Subject-tracking AF |
| Face Detection | Face-priority AF function | Yes |
| VIEWFINDER | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Viewfinder Type | Optical - eye-level penta-dach mirror | Optical - fixed eye-level pentaprism |
|---|---|---|
| Optical Viewfinder Field Coverage | 95% | 100% |
| Optical Viewfinder Magnification | 0.8x | 0.95x |
| Optical Viewfinder Dioptric Correction Range | -1.7 to +0.5 | -2.5 to +1.5 |
| Field of View Crop Factor | 1.5 | - |
| EXPOSURE & WHITE BALANCE | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| ISO (Max) | 12800 | 51200 |
|---|---|---|
| Native ISO | - | 100-51200 |
| Light Sensitivity | ISO 6400, ISO auto, ISO 100-3200, ISO 12800 | ISO 100-51200, ISO auto (100-51200) |
| Exposure Metering | Centre-weighted, spot, 3D colour matrix II | Multi-segment, centre-weighted, spot |
| Exposure Metering Zones | 420 | 77 |
| Exposure Modes | Programme, bulb, automatic, manual, aperture-priority, shutter-priority, i-TTL program flash | Programme, automatic, manual, aperture-priority, shutter-priority, shutter & aperture priority |
| Shooting Programs | Landscape, portrait mode, close-up, night portrait, Children, sports mode | 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 | Neutral, Vivid, monochrome, landscape, portrait | 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, fluorescent, cloudy, sunlight, Flash, shade | 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 |
| Max Shutter Speed | 1/4000 sec | 1/6000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1/3 EV steps | ±5 EV range, in 1/2 or 1/3 EV steps |
| White Balance Bracketing | - | Yes |
| X-sync Speed | 1/200sec | 1/180 sec |
| Exposure Range | EV 0-20 (ISO 100) | EV 0-22 (ISO 100) |
| DISPLAY | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Type | 3" LCD display | 3" LCD display |
|---|---|---|
| Display Format | 230,000 pixels | 921,000 pixels |
| Display Form Factor | Built-in | Built-in |
| Display Features | Display brightness control | Colour control, display brightness control |
| FLASH | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
|---|
| Camera Flash | Pop-up flash | Pop-up flash |
|---|---|---|
| Guide Number (m / ISO 100) | 12 | 10 |
| Flash Modes | Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction | Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction |
| Red-Eye Reduction | Yes | Yes |
| Features | AF illuminator, flash +/- compensation, wireless off-camera control | AF illuminator, flash +/- compensation |
| VIDEOGRAPHY / CAMCORDER | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
|---|
| Digital Video Format | MOV | H.264 |
|---|---|---|
| Image Recording Format | JPEG, RAW + JPEG, NEF (RAW) | JPEG, DNG (RAW) + JPEG, DNG (RAW) |
| Max Video Resolution | 1920 x 1080 | 1920 x 1080 |
| Microphone Operation Mode | Mono | Mono |
| Microphone Features | - | Sensitivity control |
| MEMORY | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
|---|
| Memory Card Slot | SD card | SD card |
|---|---|---|
| Supported Memory Cards | SD Memory Card, SDXC Memory Card, SDHC Memory Card | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDXC UHS-I Memory Card |
| Included Memory Card | 8 GB SDHC | - |
| Image Storage | 4608 x 3072 3456 x 2304 2304 x 1536 |
- |
| Video Capture | MOV - 1920 x 1080 - 24 fps MOV - 1280 x 720 - 30 fps MOV - 1280 x 720 - 25 fps MOV - 1280 x 720 - 24 fps MOV - 640 x 424 - 24 fps |
H.264 - 1920 x 1080 - 30 fps H.264 - 1920 x 1080 - 25 fps H.264 - 1920 x 1080 - 24 fps |
| BATTERY AND CHARGING | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
|---|
| Battery Type | Nikon EN-EL14 Lithium Ion | Pentax D-Li109 Lithium Ion |
|---|---|---|
| Details | Nikon EN-EL14 Li-ion rechargeable battery (included) | Pentax D-Li109 Li-ion rechargeable battery (included) |
| Battery Life | Photo shooting - 550 shots | Photo shooting - 480 shots (50% flash usage) Playback - 4.5 hours |
| CONNECTIONS | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
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| Interface | Composite video/audio, HDMI, USB 2.0 | HDMI |
|---|---|---|
| Print Standard | Direct print, DPOF support, 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 |
USB 2.0 HDMI output (19 pin micro HDMI Type D) |
| FEATURES | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
|---|
| Self-Timer Delay | 10 sec, 2sec | 2sec, 12sec |
|---|---|---|
| Continuous Shooting Speed | 3 frames per second | 3 frames per second, 5.4 frames per second |
| HDR Mode | - | Auto HDR mode |
| Additional Features | Date/time stamp, digital image rotation, camera orientation detection, histogram display, AE lock, AF lock, in-camera red-eye removal, cropping an image, GPS ready, LCD live view mode, highlight point display, Active D-Lighting technology, face detection, built-in help guide, Scene Recognition System (SRS), in-camera RAW processing, text input to Exif header | 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 | Nikon D3100 + AF-S VR DX 18-55mm | Pentax K-S1 |
|---|
| Included Accessories | Eyepiece cover, battery charger, dust cap, body cap, lens cap, neck strap, carrying case, tripod, eyecup, shoe cap | Battery charger, body cap, shoulder strap, eyecup, shoe cap |
|---|---|---|
| Software | Nikon ViewNX 2 | Drivers & Utilities |
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | 0 °C | -10 °C |
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