Panasonic LF1 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CMOS sensor . On the other hand, Casio EX-H15 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the LF1 and EX-H15 sensor size comparison.
As seen above, Panasonic LF1 has a 1.5x Larger sensor area than Casio EX-H15. 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.