Generally, some of the advantages of the Pentax P80 compared to entry-level DSLR competitors include: it slightly higher maximum light sensitivity (6,400 ISO vs 1,600 ISO), lets you preview your photos on the screen, is newer (august, 2009 vs august, 2006), is much smaller (compact 102x59x25 mm vs professional size 132x103x77 mm) and is thinner (1" vs 3").
However, on average it has a slightly lower resolution screen (230k dots vs 1,040k dots), takes significantly lower resolution photos (9.8 MP vs 17.9 MP), doesn't record movies in 24p, has a much smaller sensor (1/2.3" 6.2x4.6mm vs APS-C 23.6x15.8mm) and doesn't have a viewfinder (none vs pentaprism).
Nikon D80
3 years older
$700 (body only)
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Significant advantages of the D80 (vs the P80)
- Much larger sensor: APS-C 23.6x15.8mm vs 1/2.3" 6.2x4.6mm
- Has a viewfinder: Pentaprism vs None
- Shoots RAW
Significant disadvantages of the D80 (vs the P80)
- Significantly smaller screen: 2.5" vs 2.7"
- Much larger: Professional size 132x103x77 mm vs Compact 102x59x25 mm
- Much thicker: 3" vs 1"
common strengths of the D80 and P80
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Canon Rebel T2i
6 months newer
$499 - $949 (body only)
$569 - $867 18-55mm lens
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Significant advantages of the T2i (vs the P80)
- Much larger sensor: APS-C 22.3x14.9mm vs 1/2.3" 6.2x4.6mm
- Has a viewfinder: Pentamirror vs None
- Faster autofocus: Phase detection vs Contrast detection
Significant disadvantages of the T2i (vs the P80)
- Much larger: Prosumer size 129x98x62 mm vs Compact 102x59x25 mm
- Much thicker: 2.4" vs 1"
- Much heavier: 530 g vs 125 g
common strengths of the T2i and P80
- Fairly small: Prosumer size 129x98x62 mm vs Compact 102x59x25 mm
- Very thin: 2.4" vs 1"
- Light weight: 530 g vs 125 g
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