The original Infiray Macro Lens is seldom available and when it is it's expensive for what it is.
There are several other Infiray adapters uploaded but I couldn't see one that emulates the original item.
There is a hole in the adapter for a 8mm x 3.3mm (standard) neodymium magnet that makes this much easier to remove than a sleeve type adapter.
I have made it around a 18mm Diameter ZnSe lens (I accidentally ordered instead of the 15mm but in any case :-) ). I stuck with a focal length of 50.8mm which seems to be where the original Infiray model is at but the focal length will be personal preference so if you wan't to fit a bit more on screen go longer 50.8mm suits me.
I printed in TPU and glued the magnet in, the lens is push fit and is snug without being tight. I will probably print in Resin shortly as TPU loos a bit ammateur compared to the surface finish of resin. Either way I'm happy for now.
The lens was half the price of an Infiray original so I may get a longer focal length lens with the money I've saved.
The author marked this model as their own original creation.