Taken Dec 23, 2007 at Garrapata State Park near Carmel, CA. I used an 81B and two polarizers to slow the exposure to around 30 sec. By stacking two polarizers I was able to get dramatic variations between blue and red hues when turning the filter.
Location
Garrapata State Park, CA
Details
Pentax 67II, Pentax 55mm, Velvia 100, 81B, two Polarizers, f22@30sec.