Canon SX30 IS has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Digic 4 processor. On the other hand, Panasonic FZ300 has a
12.0MP (1/2. ) sized CMOS sensor and features Venus Engine processor.
Below you can see the SX30 IS and FZ300 sensor size comparison.
As seen above, Canon SX30 IS has a infx Larger sensor area than Panasonic FZ300. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.