Photos lost after syncing iphone 4

If you have a previous backup with those photos on their you can restore from that backup. If you dont, sorry there isnt anything you can do.
MacBook Pro Mac OS X (10.6.4) iPhone 4, Windows 7

Wait...you took pictures on your iPhone 4, then you synced/restored it from your 3GS backup?
MacBook Pro 13.3" Windows XP

You said you took them with your new iPhone correct? Did you take the photos before or after you synced from backup from your old phone? If you did it before you synced with your old phones backup then the photos are likely gone because when you synced it, it erases what is on the phone and uses the backup. If the photos were taken after the syncing then it shouldnt have been erased.
If you took the photos before the syncing and then connected your phone to iTunes to sync it, then it should have created a new backup of the iPhone 4 before it synced the backup of the old phone. Open up iTunes and then click on Edit, then Preferences, then click the Devices tab and see if there is a backup from your iPhone 4. If there is, and you havent backed up your iPhone 4 since it was synced then the backup would have those photos. So what you would need to do is restore from that backup. which would erase what is on the phone now, but you need to do it without it making a backup of your current iPhone again. Once you do that you will lose that previous backup I think. Im not sure of the procedure to restore it from the other backup without it making a new backup. whenever I sync my iPhone it always creates a new backup. There must be a way to stop it.
After you figure that out and restore from your iPhone 4 backup that has the photos, you will want to get those photos off your phone. You can either email them to yourself or when you connect to your phone to your computer it should give you a pop up asking what you want to do with the photos. At that time you can click on the open or view files and then copy and paste them to another folder on your computer. Then you can always get them back into your phone by syncing it with iTunes. Then after you get the photos off your phone, if you want you can restore it from the backup again of the 3G phone and then start over again.
Windows Vista iPhone 4

Very helpful! But wait--once I get to Support--Devices--Backup, how do I restore to that backed up version of my Iphone?
I too have lost photos and am trying to get them back.
HP iPhone OS 3.0 none

Same happened with me Photos lost after syncing iphone 4....
i check in itunes and didnt find backup of iphone4
there are old iphone backups.....any body knows help please
where are those photos lost...all should be on drive i think
do any body know who to read root folder of iphone4 ????
Windows 7