Quote Originally Posted by moonwindrial View Post
Normal exposure(Metered without filter, E.I ISO 25) was F11, 1/15s. today was very sunny day. I took a photo at 1pm. I tried exposure bracketing. +3 stop ~ -3 stop. changed shutter speed only.

Take a shot @ the box speed without any filters, just to test and see that all's well with your camera and processing.