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"alphaQuad" <alp### [at] earthlink net> wrote in message
news:web.488a4fc62dc5bc4e568f2ce70@news.povray.org...
> larger lens was helpful
thicker? .... i would have imagined a thinner lens would have been better
>
> #declare concav_glass_ = // f = -3.99984
> difference { cylinder { <-.5,0,0>,<.5,0,0> 3 }
> sphere { <-4.0005,0,0>, 4 } sphere { <4.0005,0,0>, 4 }
> material { m_glass } photons { target reflection on refraction on }
> }
> object { concav_glass_ translate <-8 + 4.35,-10> } //4.137943
>
> #declare maglass_ = // f = 8.275885
> intersection {
> sphere { <7.2,0,0>, 8 }
> sphere { <-7.2,0,0>, 8 }
> material { m_glass } photons { target reflection on refraction on }
> }
> object { maglass_ translate <-8,2,-10> }
>
> just a guess here from what looks best,
> Distance to lens2 = radius reduction times focal-length(lens1) +
> lens2_impact
>
>
> haven't found any real explanation of this yet.
i better get hot on the part i spoke up for. i'll have to review this thread
to pick up your changes since you posted the zip file. i think i can get
this done today. yesterday i dug 115 post holes and planted the posts .....
so i'm entitled to a easy day. slow down a bit so i can catch up ;-)
Jim
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