A battle of the tablets has started after both Nokia and Apple launched their latest products on the same day.
The contest is set to be the fiercest yet as Apple faces growing competition from rival gadget-makers.
Apple said the iPad air – the lightest yet – is eight times faster than the original iPad that came out in 2010.
Apple has also launched the iPad mini which features a high definition screen.
Apple’s announcement came on the same day that Nokia introduced its first tablet computer.
Nokia hopes its new Lumia 2520 will steal the main share of the Christmas market.
The new device will use Microsoft’s Windows Phone system and comes as Microsoft moves to complete its deal to buy Nokia’s phone business and patent rights.
The deal is expected to close early next year.
Finnish handset maker Nokia has seen its mobile phone business deteriorate since Apple launched its revolutionary iPhone in 2007.
Microsoft, meanwhile is losing heavily to Apple as traditional personal computers sales fail to compete with smartphones and tablets.
The 10.1-inch Nokia tablet is expected to go on sale by the end of the year.
All versions of the 2520 will come with built-in 4G LTE cellular access.
By contrast, iPads and most other tablets make cellular access optional, with their cheapest models capable of using Wi-Fi only for Internet access.