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Hourglass


Hourglass
Photo Information
Copyright: H Ralf Lundgren (bucanas) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1535 W: 16 N: 711] (10198)
Genre: Places
Medium: Color
Date Taken: 2008-04-09
Categories: Macro
Camera: Nikon D200, AF MICRO NIKKOR 60MM 1:2.8 D
Exposure: f/16, 1/250 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2008-07-06 4:17
Viewed: 168
Points: 16
[Note Guidelines] Photographer's Note
An hourglass, also known as a sandglass, sand timer or sand clock, is a device for the measurement of time. It consists of two glass bulbs placed one above the other which are connected by a narrow tube. One of the bulbs is usually filled with fine sand which flows through the narrow tube into the bottom bulb at a given rate. Once all the sand has run to the bottom bulb, the device can be inverted in order to measure time again. The hourglass is named for the most frequently used sandglass, where the sands have a running time of one hour.[citation needed]
Factors affecting the amount of time that the hourglass measures include: the volume of sand, the size and angle of the bulbs, the width of the neck, and the type and quality of the sand. Alternatives to sand that have been used are powdered eggshell and powdered marble.[1] (Sources do not agree on the best internal material.)
Hourglasses are still in use, but typically only ornamentally or when a relatively approximate measurement of time is needed, as in egg timers for cooking or board games. Hourglass collecting has become a niche but avid hobby for some, with elaborate or antique hourglasses commanding high prices.
mesquens1, chrisJ, Niva, tibig has marked this note useful
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Critiques [Translate]

Bela ampulheta e bela foto, caro Ralf.
Bom domingo,Raimundo

  • Great 
  • chrisJ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4190 W: 222 N: 3833] (28087)
  • [2008-07-06 4:39]

Ola H

Effective tight framing on the hourglass in this superb macro shot. Tfs! Parabens!

Nice macro here, good crop. Nice pic
David

  • Great 
  • Niva Gold Star Critiquer/Gold Note Writer [C: 958 W: 0 N: 503] (6457)
  • [2008-07-06 6:53]

Bonita foto, original e bons detalhes!
Bravo, Ralf !
Com o meu abraço,um bom Domingo (sem pensar nas horas passarem!),
NIvaldo

Hi Bucanas!
Original macro. Good sharp and contrast. Nice light and colors. Good shot.
Cheers!

  • Great 
  • tibig Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 650 W: 25 N: 635] (7139)
  • [2008-07-06 11:30]

Fine details of the sand grains caught mid-air.
Regards,
Tibi

  • Great 
  • EOSF1 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1456 W: 126 N: 2044] (17611)
  • [2008-07-07 10:49]

Very good idea Ralf! I love it, well thought and well done, thanks!

Mario

Olá Ralph,
Grande engenho e uma excelent foto, muito bem composta. Parabéns, mb

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