I've used one like this on my Nikon D7000 with really good results. Improves the sound in your videos!

Compatible with the following: Nikon DSLR Camera D5100, D7000, D300s, D3s etc Canon DSLR Camera EOS 1D Mark IV, 5D Mark II, 7D, 60D, 600D/Rebel T3i/Kiss X5, 550D/Rebel T2i/Kiss X4 Canon Camcorder LEGRIA HF G10, HF M41, HF S21 Pentax K7 K-5 And any other camera which has a standard 3.5mm microphone socket and hot shoe--doesn't have to be active--only to hold the microphone base.

Specifications: Model: MIC-01 It fits any DSLR cameras with 3.5mm mic socket with a standard hot shoe base (Note: If your camera don't have 3.5mm mic socket, this microphone won't fit.) Type: MS (Mid – Side) stereo wire Length of cable: About 11.02 inch / 28cm Power requirements: 3V CR2 battery INCLUDED Battery life: it can last for about 800 hours with the CR2 3V Li battery ( NOTE: battery is included) Size: 130 x 60 x 35 (L x W x H) (not including conductor) Package size: 205 x 125 x 40 (L x W x H) Colour: Black Net Weight: About 45g (not including battery) Gross Weight: 4.2 oz / 119 g

Package included: 1 x Microphone 1 x Wind screen 1 x Manual 1 x Battery

(The camera isn't included, it's for show purpose only.)