Coupler for Gopro Hero 3 to Brunton Echo monocular = airsoft scope-cam

thingiverse

I'm attempting to design and construct a "scope-cam" for airsoft use, which involves building a camera that attaches directly to the airsoft gun and replicates the view seen through a scope. I'm utilizing a GoPro Hero 3 that I happen to have on hand and combining it with a Brunton Echo 7x pocket monocular that I also own. Connecting these two components together requires unscrewing the eyepiece lens from the Brunton Echo initially. I'm not entirely satisfied with my earlier design, but this new coupler should work effectively as long as the Brunton end fits snugly onto the GoPro Hero 3 lens without the waterproof case attached. After unscrewing and removing the eyepiece lens barrel on the Brunton scope, it's necessary to insert the coupler from one side into the Brunton Echo's eye socket while pushing firmly with some sort of object until securely clicked. The pictures captured through this contraption will appear much smaller than full-screen and be a circular image in the center. As the Brunton does not come equipped with crosshairs, there will naturally be none present either. Note: To avoid any confusion or potential issues, it is highly recommended that you exercise caution when unscrewing the eyepiece lens from the Brunton Echo to prevent damage to both components. It is also essential to carefully remove and replace the eyepiece lens after installing the coupler on the scope's barrel, ensuring a tight yet not overly constrained fit for maximum performance. This 3D-printed attachment piece has been optimized with an optimal level of detail by reducing the overall infill percentage while preserving its functional integrity.