I can't recommend the 16mm pard, it has a base mag of 4. Put it on a scope with a base mag of 6 and you have 24 x !!
I had mine mounted on my Optisan 6-24 atop of a .17 hmr, at 70 / 80 yds your field of view was about A4 size.
Unless your shooting 100 yds plus with a low mag scope I'd stay clear of the 16mm one.