[rick_dykstra]

I've got the Elmarit-R 24 2.8 and it's a lens that one needs to use carefully. It exhibits significant field curvature which can be trap if used wide open and there are critical features near the edges. Stop it down and it improves noticeably in this respect. I've found it to be great at f8 and try not to use it wide open and this tends to work with landscapes. Summary, the curvature issue makes it a tricky lens to get the best out of at times, but otherwise its fine.