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in news:3da300eb$1@news.povray.org Ive wrote:
> Yes, I know the rumours about his use of a camera obscura. In my
> opinion, this is not true.
If he did he wasn't the only one ...
> But anyway, if he has used such advanced technologies and optical
> utilities,
... there was a lot more technology available these days than one may
think. Doing this kind of work with a normal, pinhole, camera obscura is
near impossible due to the lack of strong light sources. But lenses
where already available, Christiaan Huygens (1624 - 1695) was one of the
great lens grinders of his time. Vermeer (1632 - 1675) may have been
very well aware of these tools. It is for example known that Rembrand
(1606 - 1669) used lenses and has met Huygens.
A great book on all this is:
Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters
by David Hockney
Viking Press; ISBN: 0670030260
There also was a great documentary on the subject on the BBC:
http://news.bbc.co.uk/1/hi/entertainment/arts/1595979.stm
Ingo
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