Canon's higher-end PowerShot cameras are certainly more compelling, but they're also expensive. If you're on a budget, you might want to settle for one of these ELPHs. Canon is introducing three new models this week, including the ELPH 150 IS, 140 IS and 135 -- they're priced at $150, $130 and $120, respectively. The latter duo replace the A2600 and A2500, while the 150 is a new addition to the lineup. That model includes a 20-megapixel CCD sensor, while the other two feature 16-megapixel CCDs. All three have DIGIC 4+ processors and 2.7-inch 230k-dot LCDs. They also shoot 720p video, which should certainly suffice for casual web use. The pricier two models include optical image stabilization -- in fact, the 140 IS and 135 are identical, save for the 135's lack of OIS. Those two include 8x optical zoom lenses, while the 150 IS packs a 10x zoom. All three cameras are scheduled to ship later this month.