10 of the best SLR video accessories

Magic Lantern
Firmware download and wiki, £free
The Canon 5D MkII and 550D were designed primarily to take photos, with video as an afterthought. This means that they don't feature all the handy electronic aids that come with a dedicated camcorder. The cunning Magic Lantern folks have tweaked Canon's firmware to add focus assist, audio metering, exposure tools and more to turn your SLR into a video powerhouse. But BEWARE – updating your camera with unauthorised firmware isn't covered by Canon's warranty and there's the real possibility you could brick your precious camera. Whether the potential gain is worth the risk is up to you. Now also available for 60D and 600D.