10mm.This was captured at ~Angel Island State Park. San Francisco,ca is behind me.
Click to enlarge is a 2896 X 1944 image size.
I wanted to preserve all the wonderful details. :O)

The island is also alive with history. Three thousand years ago the island was a fishing and hunting site for Coastal Miwok Indians. It was later a haven for Spanish explorer Juan Manuel de Ayala, a cattle ranch, and a U.S. Army post.
More...
http://www.parks.ca.gov/?page_id=468