I have set up my new iPad Air by restoring from the latest backup from my iPad2. However i can only see the photos from before Jan this year and none of the photoI have taken since then. I cn see the new photos on my iPhone ne old iPad, ny ideas?

Were the missing photos in the camera roll on your iPad 2? The backup only includes camera roll photos.

If they were, but were not restored from the backup, if you still have the iPad 2, import the missing photos to your computer (see http://support.apple.com/kb/HT4083) then put them in a folder and sync them to your new iPad by selecting the folder on the Photos tab of your iTunes sync settings and syncing. (The only downside of this approach is that the only way they can later be deleted from your iPad is to sync them off again using iTunes. To get them in your camera roll you would need to use an app like PhotoSync to transfer them from your computer to the camera roll on your new iPad using you wifi.)

You're welcome. It's best to import them to your computer while they are still in the camera roll. The photos in photostream are at a lower resolution than the originals, so even if you save them back to the camera roll they will be of a slightly lesser quality.