yeah i was looking for a camera for some night timelapse, found a very good video on youtube with the a495 going for like 4 days, and i quiet liked its night/star performance right at the end, so was going to buy one just for this.
i can do it with my sx30is, but its cold out, if i come indoors it could get stolen, so the cheaper 495 i would not worry about so much, plus i plan on driving it out to a big local hill away from the city, coming home and collecting in the morning, if the weather changed i'd had a wet cam....
had a browse, cant confirm the sensor is the same, so will have to cross the 490 off the shopping list