Quartz deep into laser light
Tags: Light
Photo Friday Sunday, January 30th 2005 / by Davide Troise
Well, Macro-Rughy was nice, but take a picture of a stone of brazilian transparent quartz deep filled by laser light is much better! Here the result and the technical notes, equipment and procedure.
Note the path of principal laser ray (wavelenght 630-680 nm):
[update: this photo had participated at Photo Friday in 03-18-05 ‘Glow’ challenge as link n.473 ]
Some technical notes:
- Focal lenght: 17 mm
- F-Number: F/4,9
- Exposure: 8 seconds
- ISO: ISO-100
Equipment: a tripod (for mechanical stability), two sheets of paper (as background), a spot light, patience.
Procedure: first regulate F-Number and exposure in a dark room, then turn on a spot light to regulate the focus (it isn’t possibile for a camera to calibrate focus in the dark), finally turn off the light and press the shutter button.
Some granulation of image is perfectly natural first because of the lack of light, second for a little imperfection of quartz’s crystal. Anyway the result is beautiful, like one can see in this detail:
It seems a stellar field or is it my professional deviation?
