I was wondering if it is possible to use my shotgun mic from my Sony pd-170 on my Canon T2i. Is it possible to connect my shotgun mic XLR to 3.5 mm and hook it up to my Canon? I'm still new to this all, so I have no idea if this will work. All the shotgun mics I've seen take batteries. Thanks in advance!
no what you need is a microphone preamp with phantom power. Preamps made by Beachtek and JuicedLink are you're best bests. Connect the shotgun to the preamp, switch on phantom power, adjust levels and plugin the 3.5mm output into the camera.
Some onboard preamps even allow you to override AGC
I'm part owner of the company Oomagamma, we make audio gear along with microphones. All the better quality shotgun mics are phantom powered, so you'll need a source for that. The shotguns with batteries are usually very low output to keep them from being noisy as they use multipliers to pump 1.5v to what the capsule needs.
We're making some stuff that would do what you're asking for.