1/100 • f/5.6 • 85.0 mm • ISO 100 •
Canon EOS 600D
EF-S15-85mm f/3.5-5.6 IS USM
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Pear leaves 'pleochroic halos'
![Pear leaves 'pleochroic halos' Pear leaves 'pleochroic halos'](https://cdn.ipernity.com/200/19/62/43291962.7c677f2b.640.jpg?r2)
![](https://s.ipernity.com/T/L/z.gif)
The fungal rust spots on the pear tree leaves remind me of the pleochroic halos often seen in biotite mica crystals in thin sections of rocks prepared for petrological microscopy.
www.ucl.ac.uk/%7Eucfbrxs/PLM/zircon.html
www.ucl.ac.uk/%7Eucfbrxs/PLM/zircon.html
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