This works on my SJ8 PRO , but could work on other versions or makes with the same dimensions.
Angle of the camera is 30 degrees.
The mount is fastened onto the drone top plate with cable ties.
One version is with no lens protector or filter , the other is with a big CPL filter.
On the right hand side of the sketch , you will see 2x slits where a 20mm battery strap can go trough. Its to keep the camera from falling out , but more importantly , clamping the CPL filter so its harder for it to come off , as nothing rally holds it onto the camera.
Still a work in progress. I am busy with V3 witch holds a Yi 4K lens protector. Its smaller and more practical.
Feel free to ask for changes. Ill be happy to do it if I can and have time.
Added: SJCAM SJ8 PRO mount with Yi4k filter 15 Degrees for Martian II v7.
It was request by an user to make a 15 Degree mount to fit a Martian II frame specifically.
Please note I have not printed the file. PLEASE give feedback when you do , so I and other users know if the file is 100%
-- Smaller support on top / more flexible (to protect from impact)
-- Better clamping abality for filter.
2019/07/20 : 15 Degree Martian II added