The photo above and the photo below I experimented with my manual settings, making sure I didn't injure my retina by looking through the lens (that was tricky). I made sure I attached my high quality, glass ND filter purchased at Precision Camera in Austin, TX. For the photo above, my settings were: f16, 1/400, iso 50. For the photo below, my settings were: f16, 1/2000, iso 250.