This is a diaphragm "hot shoe" insert for pentax film camera flash mount.
I have also upload the first version without the diaphragm on it.
If you need any measurements, tell me in the comments and I will update a file of any type (step, solidworks etc.)
You should se a 0.2mm nozzle for a better resolution
I think you can adapt the model for other brands of (digital) cameras by re-scaling the size between x0.95 and x0.99 in your own slicer.