Their are other difference between the ZS30 and ZS25. The ZS30 can shoot in 60p while the ZS25 is only limited to 30p since the chip can only output 30 frames per second. Plus, with the ZS30 you can use the top video mode until theirs no more space in the memory card while on the ZS30, you're able to shoot until it hits 4GB. You can shoot longer than 4GB if you choose the lower AVCHD mode on the ZS25 though but still a big tradeoff. Basically when it comes to video, it's a bit different. Plus, the stabilizer on the ZS30 is better as well. The ZS25 has a standard Power OIS while on the ZS30, It has a 5 axis stabilizer.
Edited by Paulo Teixeira - 10/24/13 at 5:59pm