(Looks like someone beat me to my suggestion for the replacement cap)
Nice night shots, DC is a great city for photo ops. I especially like the ones from Korean War Memorial, I have not been there at night.
I agree about the lens cap for the DA 40mm. My wife told me I needed to take a long look at the screw off lens cap because I will probably would lose it soon enough.
The manual says that you can use a 30.5mm filter on the lens hood, so I don't see why you couldn't get a 30.5mm lens cap and use that when traveling.
Adorama sells a generic snap off version for less than $5. I think I will add one of those to my next order and see how that works.
Last edited by bigdog104; 06-06-2010 at 07:40 PM.
Reason: Previouse reply already mentioned lens cap suggestion.