A January 2003 trip to the local Palo Alto park. I used a tripod with my Minolta Dimage 7i to take pictures of flowing water. To get long exposure times, I used a 4x Neutral Density filter and small apertures like f/6.7 and f/9.5. I got exposure times (at ASA 100) of up to 4 seconds - hence the need for a tripod.