I have shot a lot of very early morning shots lately and am just having trouble nailing focus with the XT-1, 10-24 combo. This may be a lens problem or camera problem or a combination of both since the lens is a f4. I've thought long and hard on this and finally sent it back for a 16 1.4. I also have the 18-55 coming so I have that zoom range covered. During daylight hours the 10-24 was very sharp. I'll miss the zoom I know but honestly I didn't use 10-14 as much as I thought I would.