Apple has announced the latest iPhone range with a brand new screen system called '3D Touch' - but it did not appear to impress investors.

The technology allows the screen to recognise how hard it is pressed, which means you can touch and hold parts of the screen at different pressure levels to give you access to in-app menus and shortcuts.

For example you can "peek" at e-mails without fully opening them by pressing your finger down on an item in your inbox.

But Apple's share price dropped by a total of four points throughout the presentation by chief executive Tim Cook, and some Apple fans dismissed the new phone's flagship feature as a minor change.

The stock's hangover continues as it climbs down from the record valuations recorded earlier in this year - it ended trading yesterday down 1.9%.

That is the biggest post-event drop since the launch of the iPhone 5C and 5S two years ago, it triggered a 2.3% fall.

Apple shares were down by 6.2% over the 30 days leading up to the launch.

Apple shares down about 17% from their US$132 per share high earlier this year - although part of this is due to a broader slowdown in the market.

There is unlikely to be any significant change in the share price – other than reflecting overall market movements until it releases full year results on October 19.

A highly rated comment on Reddit's Apple forum mocked: "Apple just introduced right-click to iPhones. Nice".

The main iSight camera is significantly improved, going from eight megapixels to 12 megapixels.

Meanwhile, the front-facing camera has also been optimised for selfies.

The screen now acts as 'flash', which varies in intensity depending on the light levels around you.

But the smart feature appears to have been lifted from popular apps, such as Snapchat, which do something similar.

The phones, which will be called the iPhone 6s and 6s Plus, start at €740 for the 16GB 6S model and €850 for the 16GB 6S Plus.

Earlier, Mr Cook showed off a new iPad line, saying: "Today we have the biggest news in iPad since the iPad".

He revealed a new device - called the iPad Pro - with an ultra-high resolution screen measuring 12.9-inches.

A stylus which the firm calls the "Apple Pencil" is also being released.

But social media users quickly circulated comments made by Steve Jobs in 2007, when he scoffed: "Who wants a stylus?".

In 2010 he also poked fun at his rivals' attempts to imitate iPad, saying: "When you need a stylus, you already failed".

Apple also demonstrated its overhauled Apple TV service, with a redesigned remote featuring a glass surface, and Siri integration.

Multiplayer gaming will also feature on the TV platform, and the developers of classic iOS game Crossy Road demonstrated their game on the system.