Judges at Practical Photo-graphy magazine also awarded David Queenan the Photographer of the Year 2009 title for his winning entry.
The 'brief' was to produce a series of three images capturing the theme The Good, The Bad and The Ugly.
Said David (45) of Foredale Terrace: "I chose pants – a lacy red pair, horrible yellow y-fronts and Union Jack bloomers.
"I searched eBay to find them and between the underwear, the new piece of washing line and pegs I reckon it all came to about £20."
David had snapped his way into the final six from an initial field of thousands with two successful qualifier shots of the Falkirk Wheel at night and a black and white Port Glasgow scene.
Of being named overall winner, he said: "It was quite unbelievable. With the theme I'd chosen I thought I'd be first or last, the judges would love it or hate it!"
Graphic designer David has already bought a new camera lens with part of his winner's £2000 Jessops vouchers.
And as for the pants, David joked: "I'll probably keep them with my props."
David will also be among the winners collecting prizes tomorrow (Saturday) at Bo'ness Library in the annual Bonnie Bo'ness photography competition.
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