Generally, some of the advantages of the Canon SX120 IS compared to entry-level DSLR competitors include: it has a slightly larger screen (3.0" vs 2.5"), has image stabilization (lens vs none), is newer (august, 2009 vs august, 2006), is much smaller (mid size 111x71x45 mm vs prosumer size 127x96x78 mm) and is slightly less expensive ($225.24 vs $749.00).
However, on average it has a slightly lower resolution screen (230k dots vs 920k dots), takes slightly lower resolution photos (8.6 MP vs 16.1 MP), doesn't record movies in 24p, doesn't shoot as fast continuously (0.9 fps vs 4 fps) and doesn't have a screen which flips out.
Nikon D3000
similar age
$449 18-55mm lens
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Significant advantages of the D3000 (vs the SX120 IS)
- Much larger sensor: APS-C 23.6x15.8mm vs 1/2.5" 5.8x4.3mm
- Has a viewfinder: Pentamirror vs None
- Faster autofocus: Phase detection vs Contrast detection
Significant disadvantages of the D3000 (vs the SX120 IS)
- No image stabilization: None vs Lens
- Much larger: Prosumer size 126x97x64 mm vs Mid size 111x71x45 mm
- Much thicker: 2.5" vs 1.8"
common strengths of the D3000 and SX120 IS
- Very small: Prosumer size 126x97x64 mm vs Mid size 111x71x45 mm
- Very thin: 2.5" vs 1.8"
- Inexpensive: $449.00 vs $225.24
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Nikon D5100
1 year newer
$500 - $597 (body only)
$600 - $697 18-55mm lens
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Significant advantages of the D5100 (vs the SX120 IS)
- Much larger sensor: APS-C 23.6x15.6mm vs 1/2.5" 5.8x4.3mm
- Has a viewfinder: Pentamirror vs None
- Higher resolution movies: 1080p @ 30fps vs 480p @ 30fps
Significant disadvantages of the D5100 (vs the SX120 IS)
- No image stabilization: None vs Lens
- Much larger: Prosumer size 127x96x78 mm vs Mid size 111x71x45 mm
- Much thicker: 3.1" vs 1.8"
common strengths of the D5100 and SX120 IS
- Inexpensive: $499.99 vs $225.24
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Canon EOS Digital Rebel XTi
3 years older
$749 18-55mm lens
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Significant advantages of the Rebel XTi (vs the SX120 IS)
- Much larger sensor: APS-C 22.2x14.8mm vs 1/2.5" 5.8x4.3mm
- Has a viewfinder: Pentamirror vs None
- Shoots RAW
Significant disadvantages of the Rebel XTi (vs the SX120 IS)
- Much smaller screen: 2.5" vs 3.0"
- No image stabilization: None vs Lens
- Much larger: Prosumer size 127x94x65 mm vs Mid size 111x71x45 mm
common strengths of the Rebel XTi and SX120 IS
- Very small: Prosumer size 127x94x65 mm vs Mid size 111x71x45 mm
- Very thin: 2.6" vs 1.8"
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