Wallen Creek Shut-ins Uncategorized Wallen Creek Shut-ins. Getting it all in.f/14, 1/2 sec., ISO-200, 29 mm focal length. Many thanks to Casey Galvin tracking this one down and to the property owners allowing us access. Wallen Creek Shut-ins.f 5.6, 1/10 sec., ISO-100, (0 mm focal length. Wallen Creek Shut-ins.f/11, 1/2 sec., ISO-125, 90 mm focal length, vertical stitch of three images. Wallen Creek Shut-insf/8, 1/5 sec., ISO-160, 90 mm focal length. Wallen Creek Shut-ins swirlingf/14, 15 sec., ISO-200, 19 mm focal length.