Check focus of infinity corrected optics module

JS updated content for clarity after speaking to Ed

The 12.7mm diameter, 50mm focal length achromatic lens is not be infinity focused when printing the infinity focused optics module.

It needed to be shimmed before it was in focus, see this image of it in focus once shimmed:

I think the RMS optics module should have a lens_f of 47.5mm. Please check this.