I have found that the Spark does not fully ‘understand’ all cameras hdmi output. Canon XC-10 and the Spark shake hands ok and put out full HD. With Canon XA-10 I get no more than 720x576. With Canon XF200 I can get 1280x720, if I put 1280x720 in record-settings and 1920x1080 in hdmi output. Full HD in both settings, will give 720x576…
I have read somewhere about ‘shy’ hdmi and that this can be the issue.

As I am looking into new cameras, I would appreciate that you users of the Spark, could share your experiences of your cameras.