Dohmnuill

Many thanks, mg.

Yes, pc, my Ultron 28/1.9 is a great lens. I'm still mourning the loss of its hood though.

Quite so, SQLG. I was comparing common radiation risks only.

My two old Pentax Takumars are in the same cupboard as the rest of the lenses. Ground up and swallowed would likely be a bad idea.. The radiation from such lenses is miniscule compared with that ...