Or you can get those "GREY LENS CAP" (or white ..whatever, for helping WB, works better then card, and more easy)
Also less then $5 ..White card suen la... and shoot raw ...
Or you can get those "GREY LENS CAP" (or white ..whatever, for helping WB, works better then card, and more easy)
Also less then $5 from HK ..
Caps are good if you have only have 1 thread size unless you change all caps for your lens. In addition, if you are having ultra thin filter, you can't use those caps either...