4.88 in 2.93 in  | 4.9 in 3.62 in  | |
| Available colors | ||
| Editiorial reviews | ||
| User rating |
 Nikon D3100 |  Sony SLT-A33 | |
|---|---|---|
| Sensor type | CMOS | CMOS |
| Image sensor format | DX | APS-C |
| Sensor size | 0.91 in | 0.92 in |
| Sensor photo detectors | 15.0 Mpx | 15.0 Mpx |
| Effective pixels | 14.0 Mpx | 14.0 Mpx |
| Image ratio w:h | 3:2 |
|
| Max resolution | 4608 x 3072 px | 4592 x 3056 px |
| Other resolutions |
|
|
| Processor | Expeed 2 | BIONZ |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| ISO |
|
|
| ISO Auto | yes | yes |
| ISO minimum | 100 | 100 |
| ISO maximum | 12800 | 12800 |
| Boosted ISO maximum | 12800 | 25600 |
| Maximum image resolution | 4608 x 3072 px | 4592 x 3056 px |
| White balance presets | 12 | 6 |
| White balance modes |
|
|
| Custom white balance | yes | yes |
| Supported image file formats |
| JPG |
| Photo effects | Black&White |
|
| Image stabilizer | no | no |
| Image stabilization type | No | Sensor-shift |
| Supported aspect ratios | 16:9 |
|
| Uncompressed format | RAW | RAW |
| AEB/HDR support | no | yes |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Lens mount | Nikon-AF |
|
| Magnification (Crop factor) | 1.5 x | 1.5 x |
| AF assist (auto-focus assist light) | Lamp | Lamp |
| Contrast autofocus | yes | no |
| Autofocus in recording mode | yes | yes |
| Focal length multiplier | 1.5x | 1.5x |
| Autofocus | Single Auto Focus |
|
| Auto Focus (AF) lock | yes | yes |
| Manual focus | yes | yes |
| Auto Focus (AF) assist beam | yes | yes |
| Number of focus points | 11 | 15 |
| Max number of AF points (incl. assistant) | 11 | 15 |
| Image stabiliser | Lens based only | Built-in |
| Filter diameter | 2.05 in | 2.17 in |
| Phase detection autofocus | yes | yes |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Screen size | 3.0 in | 3.0 in |
| Articulated LCD | no | yes |
| Screen technology | LCD | LCD |
| Screen dots | 230000 | 921000 |
| Touch screen | no | no |
| Field of view | 95.0 % | 100.0 % |
| Live view | yes | yes |
| Viewfinder | Optical | Electronic |
| Viewfinder coverage | 95.0 % | 100.0 % |
| Viewfinder magnification | 0.8 x | 1.1 x |
| Separate info display | no | no |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Camera shutter type |
| Electronic |
| Minimum shutter speed | 30.0 s | 30.0 s |
| Maximum shutter speed | 1.0 s | 1.0 s |
| Shutter priority | yes | yes |
| Aperture priority | yes | yes |
| Manual exposure mode | yes | yes |
| Exposure compensation plus | 5 | 2 |
| Exposure compensation minus | -5 | -2 |
| Expousure compensation steps | 1/3 | 1/3 |
| Continuous shooting | yes | yes |
| Self-timer delay | 10.0 s |
|
| Histogram | yes | yes |
| WB Bracketing | No | No |
| Subject / scene modes | yes | yes |
| Flash sync speed | 1/200s | 1/160s |
| Built-in flash | yes | yes |
| Flash range | 12 | 10 |
| Flash modes |
|
|
| External flash connection | Hot shoe | Hot shoe |
| Flash metering system | i-TTL | TTL |
| External flash | yes | yes |
| Continuous drive | 3.0 fps | 7.0 fps |
| Scene modes |
|
|
| Self-timer | yes | yes |
| Metering modes |
|
|
| Manual settings | yes | yes |
| Speed (JPEG) | 3.0 fps | 7.0 fps |
| Speed (RAW) | 3.0 fps | 7.0 fps |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Maximum resolution | 1920 x 1080 px | 1920 x 1080 px |
| Video recording | yes | yes |
| Recording resolutions | 1280.0 px |
|
| HD type | Full HD | Full HD |
| Supported video file formats |
|
|
| Camera playback |
|
|
| Max resolution (highest frame rate) | 1280 x 720 | 1920 x 1080 |
| Max frame rate (highest resolution) | 24.0 fps | 50.0 fps |
| Max frame rate (regardless of res.) | 30.0 fps | 50.0 fps |
| Motion JPEG frame rate | 30.0 fps | 25.0 fps |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Built-in microphone | no | yes |
| Microphone type | Mono | Stereo |
| Voice recording | yes | yes |
| Supported audio file formats | PCM | AAC |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Body type | SLR | Compact |
| Body material | Plastic | Plastic |
| Colour of product |
| Black |
| Anti-dust system | yes | yes |
| Environmentally sealed | no | no |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Weight | 16.05 oz | 15.27 oz |
| Width | 4.88 in | 4.9 in |
| Height | 2.93 in | 3.62 in |
| Depth | 3.78 in | 3.33 in |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Compatible memory cards |
|
|
| Memory slots | 1 | 1 |
| Storage types |
|
|
| Camera file system |
|
|
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| Power source type |
| AC |
| Battery life (CIPA) | 550 | 340 |
| Battery technology | Lithium-Ion | Lithium-Ion |
| Number of batteries supported | 1 | 1 |
| AC adapter included | yes | yes |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| HDMI | yes | yes |
| HDMI ports quantity | 1 | 1 |
| USB version | 2.0 | 2.0 |
| Wireless | Eye-Fi Connected | Eye-Fi Connected |
| DC-in jack | yes | yes |
| Remote control | yes | yes |
| PictBridge | yes | no |
| NFC | no | no |
| Wireless network (Wi-Fi) | no | no |
| Bluetooth | no | no |
| Firewire | no | no |
| Nikon D3100 | Sony SLT-A33 | |
|---|---|---|
| GPS | yes | no |
| Orientation sensor | yes | yes |
| Calendar | yes | yes |
| Image editing modes |
| Rotating |
| Pros | ||
|---|---|---|
| Cons |
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