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Fisheye Pro lens
If your student is a fan of photography but doesn't have a DSLR -- and is therefore not able to buy different lenses for a camera body -- the Fisheye Pro lens is a fun way to give smartphone photos the warped "fisheye" look. Once snapped on to a mobile device with a magnetic ring, you're set.
The lens, also available as part of a kit, is compatible with Blackberry, HTC, iPad, iPhone, LG, Sony Ericsson, Nokia and Samsung mobile devices, among others.
Price: £32.99 ($50)
Seven Port USB 3.0 Hub
If you need a few extra USB ports when connecting a PC, tablet or smart TV to media, a USB hub is a great choice.
This particular hub comes equipped with seven ports, supports USB 3.0 SuperSpeed, Plug-and-Play function and a transfer rate up to 5Gbps.
Via: USB Geek
Double Power - D7015 7-inch tablet
Many students want a tablet to replace bulkier laptops while on the move, but sometimes its simply not possible to fork out for an iPad or Samsung Galaxy Tab. However, for basic functionality and Internet access in a lightweight casing, there are a number of cheaper options on the market -- such as the D7015 7-inch tablet. It's a little more than $50, but about as cheap as you can get for a tablet at the moment -- and comes with enough basic functions to keep a student happy.
The tablet has 4GB storage space, a processing speed of 1.2GHz, 512mb memory, one SD slot, a front-facing webcam and runs on Android. If you want to go slightly upmarket, consider a Google Nexus.
See also: Back to School: Smartphones under $100
Via: Best Buy