First field trip with a new Alpa STC and 35 and 80mm lenses. Up at 10,000' + in the eastern Sierra's for 7 days.
Both Alpa and back were flawless (more than I can say for myself). Conditions were tough; bright light (nary a cloud) and shooting between 11am and 3pm as we hiked each day about 3mi each way. Trails were blocked with snow and the altitude was wearing.
Great combination; great performers. Wonderful kit for backpacking.