Fish eye - the DRIFT cam has three settings, 720d gives you 170degs (fish eye) 1080d gives you 128degs and SD - and we've not tried that one yet as we're not sure what it gives!
We're still experimenting with settings and with cam positions but we do like the flexibility of mounts given we can and do pull and push +6g -3g :for more detail our web site has the gen on mounting them;
http://www.wildcaterobatics.com
We've just secured some professional video expertise to do ground to air so will know learn more in the next couple of weeks.
One of the flying comics is lying on the table and the back page ad shows Harry M punting the basic Nflight at £240 - that seems quite expensive