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Author   Topic : "??? - establishing lenses in perspective"
retro
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Joined: 08 Jul 2003
Posts: 146

PostPosted: Sun Jan 02, 2005 11:56 am     Reply with quote
does anyone have a good link or tutorial or book recommendation about establishing different lenses ? i tried searches on various forums, but didnt turn up anything helpful.

thanks
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jfrancis
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Joined: 08 Aug 2003
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Location: Los Angeles

PostPosted: Sun Jan 02, 2005 9:55 pm     Reply with quote
http://www.digitalartform.com/archives/2004/12/telephoto_and_w.html

http://www.digitalartform.com/archives/2004/12/one_point_persp.html
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retro
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Joined: 08 Jul 2003
Posts: 146

PostPosted: Mon Jan 03, 2005 2:33 pm     Reply with quote
thanks for the links you posted. i was looking for a way of setting up a lens in a constructed perspective, but nevertheless that brought some light into the affair, esp. about the distortion happening.

thanks again
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Impaler
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Joined: 02 Dec 1999
Posts: 1560
Location: Albuquerque.NewMexico.USA

PostPosted: Mon Jan 03, 2005 4:07 pm     Reply with quote
jfrancis was explaining that there is no "distortion" happening. The concept itself is idiosyncratic.

So, following jfrancis' advice, you could theoretically

1) sketch a scene from "normal" perspective
2) crop down the scene to something tighter
3) re-draw that sketch to a bigger size

There are actual formulas and calculations if you want to be precise, but why bother?
_________________
QED, sort of.
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retro
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Joined: 08 Jul 2003
Posts: 146

PostPosted: Tue Jan 04, 2005 4:15 am     Reply with quote
i meant the distortion happening when you're close to sth. like the example with the nose, i alway thought that was an issue of the lens. i wasnt really sure what i meant when i posted the question, but i think it's the barrel/cushion distortion i am after. any hints on how to construct that?
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Affected
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Joined: 22 Oct 1999
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Location: Helsinki, Finland

PostPosted: Fri Jan 07, 2005 9:12 am     Reply with quote
this might interest you:
http://www.msri.org/people/members/sara/articles/siamescher.pdf
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Matthew
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Joined: 05 Oct 2002
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Location: I am out of here for good

PostPosted: Wed Jan 12, 2005 1:21 pm     Reply with quote
a litt bit distortion there is yes ehmmmmmmuuuuu *Matthew sounding like yoda


.
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