Panasonic FZ35 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine V processor. On the other hand, Panasonic FZ28 has a
10.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the FZ35 and FZ28 sensor size comparison.
Panasonic FZ35 and Panasonic FZ28 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.