I purchased a 10" hdmi cable and although it provided an "image" in testing, once under the night sky it shows no stars. I then tried it with a cable I already had which seems to be the exact same make/model cable as the one that came with the camera and it worked great, however it is 3' long so I don't want to keep using it. So does anybody know what specs the cable must have to work? They both have ethernet and are rated as "high speed" so my only guess is HDMI 2.0 as the one I got is 1.4. Sorry if this has been posted somewhere, I cant seem to find it.