Hi I was out doing star trails at night. I'm using my NEX 6 I don't have a trigger with me. Each press on the shutter on a light weight tripod moved the frame a bit. I didn't know the frame was changing with this tripod as I didn't bring my heavy duty tripod. my question is do you know of any program that can align images taken? so I can stack them on startrails program and salvage the photos I took last night.