Computer giant Apple has released a number of product updates at a launch event in California.

The announcements include a new version of the iPad, the iPad Air 2, which claims to be the thinnest tablet on the market, at just 6.1mm thick. 

The tablet has an updated screen, a faster processor and a new 8MP camera which records video in 1080p and has a timelapse mode.

The new iPad also has the TouchID fingerprint recognition system that has already been available on the iPhone for some time.  

Apple also announced a new version of the iPad Mini.

The company will be hoping that the new features in the tablet range will help it to reverse declines in iPad sales in the last quarter, compared to the same quarter in 2013.

However, some analysts expect the new bigger iPhone 6 Plus, launched in September, could hurt the iPad's market share further.

Also unveiled at the launch was an update to Apple's iMac desktop computer.

It features a Retina 5K screen that Apple says is the world's highest resolution display. There was also a new version of the Mac Mini.

The event also saw the company outline further details of the new OSX Yosemite operating system for Mac.

Its new features include the ability to hand off activities between Mac and iOS devices and to make and receive iPhone calls from a Mac.

It also includes updated versions of applications like Safari, Mail, Messages and iTunes. The operating system is available from today for free.

It also outlined some updates to the new iOS 8 operating system, including the return of the Camera Roll and the introduction of Apple's new cashless payment system, Apple Pay, which launches in the US on Monday.

Apple revealed that since it launched Apple Pay last month, 500 more banks in the US have signed up to use the service.