I'm not 100% sure if this is the right forum to ask such a question, but perhaps some of you can offer a bit of advice.
I've had my Canon PowerShot S3 IS for about a year and a half now, with around 8500 shots taken. Lately I've noticed that the sensor's sensitivity has started to degrade rather fast. If in the beginning I would have no problem getting a 1/100-1/60 exposure with ISO 80 and F3.2 in a cloudy autumn afternoon, then now at the same settings I'm down to the exposures in the range of 1/40-1/20.
Do you think it's a normal aging for a point & shoot camera, or could it be a technical fault? I was planning of getting a dSRL in late 2008/early 2009 and was hoping to live with the S3 until then, but the lousy performance has got me worried if it'll last.
For background information, the camera has been operated in various environments temperature-wise, ranging from -30 to +30 degrees Celsius. I have always tried to keep it from humidity as best as I could, and it hasn't taken any serious falls or hits either.
I'd appreciate any help or information about this, thanks.