I am looking for a cheap solution for using an Android smart phone as a field monitor for my Sony A57. I know that I cannot just use an app and an OTG cable to make this work(Not an option for the A57). It does have HDMI out though. I'm wondering if there's a way to take that HDMI out signal and adapt it to the micro USB and be viewable on the phone.

Hoping someone has had some experience with this.

You can use an android app like Qdslrdashboard and a usb cable to the camera to tether the camera and get a live view on the phone.
Then there is the wifi option; from the web "DJI makes a device for streaming 1080p from a quadcopter called LIGHTBRIDGE. On the receiver they have a plug that goes HDMI to USB to display video feed on an Android phone or tablet."

Thanks for the reply. The Sony A57 doesn't support tethering via USB from what I can tell. The A58 does, but unfortunately I have 2 A57's.

I'll look into the DJI wireless. I have a DJI Phantom 3 Pro and use the Lightbridge via the controller which is connected to my phone or tablet via USB.

Seems like their should be a simple solution for this.

The A57 is older, and I believe before the "multi" plug was introduced? Also before the WiFi options showed up... Somehow I don't think it had an A/V out either, so you'd be stuck with the HDMI as the only "video out".

I'm interested in that ,also.
The newer phones have type C connector.
Maybe wireless?
The Sony PlayMemories app is not working with newer phones.
And with Nougat.
I got a "this software's not compatible" message on my Nexus 6p.
Bum....