Generally, some of the advantages of the Canon SX1 IS compared to mirrorless interchangeable-lens competitors include: it records higher quality movies (1080p @ 30fps vs 720p @ 30fps), has a viewfinder (digital vs none), has better image stabilization (lens vs none), has a screen which flips out and has a faster max shutter speed (1/3200 of a second vs 1/2000 of a second).
However, on average it has a slightly smaller screen (2.8" vs 3.0"), has a significantly lower resolution screen (230k dots vs 920k dots), takes slightly lower resolution photos (9.8 MP vs 14 MP), slightly lower maximum light sensitivity (1,600 ISO vs 12,800 ISO) and has a much smaller sensor (1/2.3" 6.2x4.6mm vs APS-C 23.4x15.6mm).
Olympus PEN E-PL1
1 year newer
$280 - $299 14-42mm lens
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Significant advantages of the PEN E-PL1 (vs the SX1 IS)
- Has interchangeable lenses
- Much larger sensor: Four thirds 18.0x13.5mm vs 1/2.3" 6.2x4.6mm
- Much smaller: Mid size 115x72x42 mm vs Prosumer size 128x88x88 mm
Significant disadvantages of the PEN E-PL1 (vs the SX1 IS)
- Lower resolution movies: 720p @ 30fps vs 1080p @ 30fps
- Significantly smaller screen: 2.7" vs 2.8"
- No viewfinder: None vs Digital
common strengths of the PEN E-PL1 and SX1 IS
- Good image stabilization: Sensor shift vs Lens
- Each has a built-in flash
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Sony Alpha NEX-5
1 year newer
$569 18-55mm lens
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Significant advantages of the NEX-5 (vs the SX1 IS)
- Much larger screen: 3.0" vs 2.8"
- Much higher resolution screen: 920k dots vs 230k dots
- Much larger sensor: APS-C 23.4x15.6mm vs 1/2.3" 6.2x4.6mm
Significant disadvantages of the NEX-5 (vs the SX1 IS)
- No image stabilization: None vs Lens
- No viewfinder: None vs Digital
- No built-in flash
common strengths of the NEX-5 and SX1 IS
- Both shoot high resolution HD movies: 1080p @ 30fps vs 1080p @ 30fps
- Flip-out screens
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