Darron Birgenheier:
Nikon D600 Celestron C90 spotting scope / telescope resolution test USAF 1951
Darron Birgenheier:
First test of Cokin P knock-off ND8 grad filter
Darron Birgenheier:
Factory-optional hood ornament on 1955 Carpenter / Steelcraft school bus (built on 1954 GMC chassis)