Like many - I have tried all sorts of camera's on-board and off. Hatcam, Cam-glasses, you name it ...
But I have to say that the best for keeping model in shot AND being able to zoom in / out without losing it ... has to be my old trusty Sony 8mm Handycam. People laugh when it comes out ... but put in the hands of a reasonable operator - you can have some of the best framed video ever. Yes I agree the resolution can be a bit off ... but the framing makes up for it.
My GoPro Hero 4 - if there was ever a camera that I hate - this has to be it ! I have so many batterys for it - trying to get any run time out of it.
SJ Sport cams (look like the GoPro 4) ... at least they keep working for longer than the GoPro ... but my 4K version cannot synch sound to video ! I transfer to PC and go to edit. Starts fine and then after a short time - the sound is dragging later and later compared to the video. So I end up cutting the sound and re-adding back to correct. The lower spec SJ sports are fine on this but I have difficulty believing its 1080 ! Its more like an expanded 480.
My Sunglass Camera is good - but I wear glasses and it doesn't sit well.
With all hat / sunglass cams - you have the same problem ... any movement of your head to look to side ... and the natural action to eyeball ahead of the model kills the video !
808's ... and MD80's ... well I think they have been put to history now by many newer cams ... and anyway - I could never keep one working more than a few months or so before it failed.
Which now brings me to the biggest PoS ever to hit the market .... Soloshot 3.
I was browsing online thinking about what camera can I get for model filming. I cam upon a link for Soloshot. The Robot Camera ... the videos supposedly showing it working were great - EXACTLY what I needed for the Club Shows etc. I accepted the Pre-Order deal of about 33% of price. They said I would wait about 3 - 5months for delivery. It actually took over 2 years before I saw my box in the mail.
Within the first year - the sealed in battery failed to charge. So I contacted Soloshot who finally gave in and sent me a new SS3 complete and told me to keep the old. Meanwhile I now see they are selling the SS3 Optic 25 system at $399 to clear ... I had paid the DISCOUNTED $599 !! AND paid Customs.
It has NEVER performed as advertised. It is fine with slow moving objects that are at a reasonable distance ... but as soon as you start to increase speed or do moderately fast direction changes - it loses it. Half the time during initialisation - it fails to align with the tag it tracks ... with lens way off mark.
I managed to force charge the old SS3 and I now have both working ... so when I video events now - I have both running with different settings to at least capture something.
They have Nikon Shoe mount on top - I am going to mount one of my Sport cams on that so I get a wide view anyway to go with the SS3 zoomed recording. That way I might at least get all the flight.
If anyone wants info on my cameras - just post here ... or if you have cameras that are good / bad ... all good info for all of us ...