Another one for the shopping list. One of the inherent difficulties of shooting on DSLR is the lack of quality audio inputs, headphone monitoring, as well as the horrid AGC (Automatic Gain Control). On a dedicated video camera, these shortcomings would be unnacceptable, yet for DSLR shooters we are forced to work with them. Well not any more!
The DS214 microphone preamp by JuicedLink is the answer to all of the above in a conveniently sized unit. It can take two audio feeds via a single 3.5mm stereo mini-jack (and a Y cable) and provides a stereo output to feed into the camera. I love this as I am looking to shoot music videos and being able to capture both a mic input and a line-in from a music player is great since you can record the actual music playback and a scratch/reference track for easy syncing in post. It also overrides the internal AGC, vastly improving the quality of captured audio. Another welcome feature is the onboard audio level meter and left/right channel volume controls for correctly adjusting your sound levels to avoid distortion. Last but not least, a headphone output (and volume control) is provided for realtime monitoring of your sound, a nice feature after going to all the trouble of making it sound great in the first place!
Several other models are available with XLR inputs and 48v phantom power to further improve your audio quality. This model works well with mics designed with the DSLR in mind that use a 3.5mm jack, such as the Rode VideoMic Pro.
Sold in the UK by Pinknoise Systems for £139 (inc. VAT, correct at time of publishing) http://www.pinknoise-systems.co.uk/juicedlink-ds214-adapter-p-665.html