Old Schoolhouse Entry at Night (former Hamilton Airbase, Novato, CA)

Taken with Pre-anniversary Speed Graphic, using 135mm Tessar lens. Exposure time was 1 minute 20 seconds, ISO 100, f8 (30 seconds per exposure meter and additional 50 seconds to adjust for reciprocity failure). I got the adjustments from the excellent book "Night Photography" by Andrew Sanderson.

Done