One more Q, if I may..I need a light, 2nd body for the 18 and 28 lenses, manual focus. The Aria is the lightest, but for an extra one third of a kilo penalty, I can get an RX.. So my question is, would the so-called badly d&ed mirror affect the photos so much that I would need to carry the penalty weight of the RX. The teles have the AX. The lighter the better, but not at a compromise..