Just came across this cheap wind filter for the internal microphones on DSLR cameras whilst searching on eBay. It is simple to attach with the velcro attachment and the results sound fantastic. Whenever I film with my DSLR the wind does always ruin the sound, as at the moment I do not own a decent external microphone. However on the test video comparison below, the results do sound very good. They come in a variety of designs including 'Fat Boy', 'Original' and 'Skinny'. Click here to view the on eBay, with starting prices of £14.99.