I've seen this approach tried before - it has problems : "Due to the sun’s movem... | Hacker News

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		arjn on Aug 24, 2014 \| parent \| context \| favorite \| on: Student’s six-foot water and solar-powered lens pu... I've seen this approach tried before - it has problems : "Due to the sun’s movement throughout the day, Henry needs to repeatedly shift the container to match the focal point. "

mbubb on Aug 24, 2014 | [–]

I wondered about this as well. Also an issue with NOT moving it to stay fucused on the water... a lens like that could start a grass / wood fire

astrodust on Aug 25, 2014 | [–]

Unless the project participants are willing to depend on this thing for fresh drinking water as part of their testing, the project itself is insultingly academic.

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