Reasons to choose PowerShot SX20 IS
Released in 2009, PowerShot SX20 IS has about 28 mm² of sensor area, 12.1 MP effective resolution, and a 560 g body. Use these values to narrow the field, not as an overall image-quality score.


The Coolpix P5100 has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
These cameras were released 2 years apart. Consider sensor generation when comparing pixel metrics.
Amber marks the value that is generally preferable in this comparison context. It is not an overall camera score.
The Coolpix P5100 has the larger sensor area. The Coolpix P5100 has the lighter body. The PowerShot SX20 IS and Coolpix P5100 have the same effective resolution. The PowerShot SX20 IS is the newer release. Also consider the lens system and subjects you shoot.
Released in 2009, PowerShot SX20 IS has about 28 mm² of sensor area, 12.1 MP effective resolution, and a 560 g body. Use these values to narrow the field, not as an overall image-quality score.
Released in 2007, Coolpix P5100 has about 42 mm² of sensor area, 12.1 MP effective resolution, and a 250 g body. Use these values to narrow the field, not as an overall image-quality score.