Originally Posted by youphone
is it possible take pictures with the camera at a lower resolution?(such as 1280x720)
Not with the native camera app (Moto help explicitly states this) but you can do so with any other camera app --- I use Camera Zoom FX (paid app) but you might find others to your liking
Unfortunately you can't change the default camera app on the lockscreen without being rooted, afaik (someone please correct me if I'm wrong on this, I'd love to swap it out).