Sony H400 has a 20.0MP 1/2.3" (6.17 x 4.55 mm ) sized CCD sensor and features Bionz(R) processor. On the other hand, Kodak Astro Zoom AZ651 has a 21.0MP 1/2.3 (6.17 x 4.55 mm ) sized CMOS sensor .
Below you can see the H400 and Astro Zoom AZ651 sensor size comparison.
Sony H400 and Kodak Astro Zoom AZ651 have sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.