Instax Wide film made by Fujifilm?
The Instax does not exactly lend itself well to an easy modification, and has a lot of parts, so I opted to simply graft this self-cocking Old Pol scope camera lens and shutter on the front after removing the plastic optic and native shutter - they come out with a few screws. But, the internal baffling I fear may vignette the image. Also, the lens to film plane distance isn't that easy to control. There may be light leaks. The hot melt glue that holds that wooden Graflex black tripod mount won't fall off, though.
Results: Nothing to show from it. This lens is too long, and the internal baffles are in the way. I will have to find a smaller lens that can be recessed into the tube/snout of the 210. Looks nice though.