I finally got around to building a barndoor tracker this summer. Here are a couple examples from low budget astrophotography setup:
M31 - The Andromeda Galaxy
The star Deneb and NGC 7000 - The North America Nebula
Canon 1000D , M42-EOS adapter w/ Super Takuma 135mm f3.5 + ProMaster Red Enhancer (Didymium) Filter to help reduce light pollution. Manual barndoor tracker.