My micro 4/3 camera is rather small. When I look at adding a lens, adapted or native, weight and length are important to me. I can look up the length and weight of any lens, adapted or native. I can figure out the length or thickness of the adapter. But I have not been able to find good data on the weight of various adapters. Does anybody know how much the Pen F adapter weighs? I found one estimate of the AR mount adapter at 75g. The Pen F adapter is much thinner, so I would guess around 40 grams. But I would like to know.