DJI O4 Lens Mod (Betafpv CO3 Lens, my best to date!)

This lens was suggested to me by https://www.printables.com/@CarterNguyen_2425202 on the KayouFrames discord. Big thanks to them!

I tried a number of lenses for the O4 “lite”, most of them have an extreme amount of fisheye or a lot of discoloration in the center due to the UV filter.

This lens seems to be the best so far. See the results here: 

Printing Instructions

• Print out of a black opaque rigid material (not TPU, or the focus will randomly change). I used Polycarbonate, but black PETG will work fine, or PLA in a pinch.
• To get the printed thread to work well, you will need to print with  0.05mm layers! I used a 0.1mm first layer to get a good bond, and an external brim
• I recommend using the X-Y Hole Compensation setting in Orca Slicer to run test fits of the thread. Mine required a 0.2mm adjustment to fit perfect!
• Print face down.

Assembly instructions

• Apply some heat to the O4 camera, I use my hot air gun on 250 degrees. This will soften the glue, but some amount of force will be required to pry the original lens off. There are good youtube videos showing this process.
• line up the adapter with the sensor, it should locate pefectly, with the sides of the adapter coming flush to the board (see photos)
• Use glue to lock the sensor in place. I've had good success with T7000 glue.
• To free the CO3 lens from the Betafpv CO3, I used a hobby knife to cut the glue, then pliers to firmly grip the lens and unscrew it. I then used a hobby knife to clean up the glue from the thread.
• Thread the lens in, then boot up the o4 and adjust the focus by screwing in to the right depth
• Lock the focus with a few drops of glue.

Enjoy!

PS: For the Kayoumini frontend depicted in the photo, it's here → https://www.printables.com/model/1380949-kayoumini-frontend-for-dji-o4-co3-lens-mod