What's the Best Go Pro lens?

[Ben Adelson]

I recently got the go pro hero 4 and am about to buy the solo. What is the best lens to get without distortion for drone flying?

 

[sixshooterstang]

I like the 10MP 5.4mm rectilinear but I have seen results from the new 4.2mm lens from ragecams which seems to be a touch better on colors (maybe?). But the 4.2mm cant be sourced elsewhere so youd have to pay the ragecams ripoff price vs the 5.4mm which can be bought else where for a third of the price.