I was running back to my car from the beach with my camera tucked under my jacket as it had just started to bucket down (again) and I couldn't resisit snapping the rainbow - I don't think it is even in focus as I was moving when I took it!
I don't think rainbows can be in focus coz they don't really exist, do they? They're a pretty play on light. The houses are sharp. Still, it's always lovely to capture a rainbow.