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Mark Krauss | all galleries >> Photo of the Day >> pad_2009 > 2009-08-01
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01-AUG-2009 Mark A. Krauss

2009-08-01

San Carlos, CA

Nikon D3 ,Nikkor 50mm f/1.2 Ai-S
1/800s f/8.0 at 50.0mm iso200 full exif

other sizes: small medium large original auto
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Dirck Brinckerhoff05-Aug-2009 06:33
Wound pretty tight.
Barry Ailetcher03-Aug-2009 15:51
Very nice image of a Acme Thread
Ruth Voorhis03-Aug-2009 14:02
Not what I expected to see.:-)
Ruth
Guest 03-Aug-2009 13:36
Beautifully shot
Steve Thuman03-Aug-2009 01:26
Looks like the valve has been recently operated (Clean lubed threads), but it's a fire system valve. Was this on the building that recently burned? That could explain someone turning it off (to shut off sprinklers after the fire was out). Or maybe it's closed now?
fotabug02-Aug-2009 22:35
Sure a long shaft to be exposed. Guess it isn't dangerous
Paul Milholland02-Aug-2009 20:49
They get used often enough to keep the rust off.