I had to do a review on the Saramonic SR-AX100 2-channel audio adapter since I couldnt find any other reviews when trying to research this myself.
This $50 audio adapter allows you to get 2 3.5mm microphones plugged straight into your dslr camera and have adjustable audio controls. Now you can monitor audio during a shoot when you used to have to stop recording, go into your menu settings, change audio internally and then start recording again.
This adapter has been a huge time saver and allows me to get two lavaliere microphones into my camera for a 2 person interview at the same time! No more syncing audio in post production!
Check out the video to see it in more detail and if interested you can buy the adapter here on amazon: http://amzn.to/1P3L6Uo
If you film a lot of two person interviews and want cheap lavalieres to go with this adapter, pick up a couple audio technica atr-3350 lavs for $29 each! this makes a great combo: http://amzn.to/1Ml8GKJ
And beware of the Beachtek version, it is the exact same thing but running $40 more!
Music by Kevin MacLeod Artist: http://incompetech.com/