Sony Cyber-shot DSC-TX20 Digital Camera Review$329.99
The TX20's handling of noise has strange characteristics, however most often they result in noisy photographs. There is no practical different between image noise levels at ISO 125, 200, 400, or 800; at least as far as our test is concerned. In reality, shots become noticeably muddy by ISO 800, and get worse from there. Noise increases pretty drastically at ISO 1600 and 3200, however noise levels are never lower than a full 1.00%, including minimum sensitivity. This is quite a high amount, even for a compact camera. More on how we test noise.
The ISO range reaches from 125 to 3200 with no extended options available. From what we can tell, this includes the "High Sensitivity" scene mode, which seems to offer no additional benefit.