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elf
Joined: 18 Nov 2007
Posts: 1104
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 Posted: Tue Feb 17, 2009 12:06 am Post subject: Tilted lichens |
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The camera was tilted up about 15 degrees and swung about 10 degrees counterclockwise. There are 18 focus stacked images. Focus stacking was done just using the bellows. The increment between imagea was around .5mm. To give an idea of the curvature, the "log" is about 65mm in diameter and the in-focus area is about 15mm front to back. Although it looks like the image is on the axis of the log, the camera was actually perpendicular to it.
I think it took a few less stacked images to complete than it would without movements.
Stacking was done with CS4 from jpegs. |
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Ken Ramos
Joined: 27 Jul 2006
Posts: 6574
Location: Western North Carolina
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| Posted: Tue Feb 17, 2009 6:57 pm Post subject: |
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Well what ever the procedure, you got a really nice shot of these lichens. Looks to be a lot of the yellow pigment parietin in them. If treated with KOH (potassium hydroxide) or caustic potash, some very nasty stuff, they should turn a purplish red. 
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Ken Ramos
Rutherford Co., Western North Carolina |
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