Hello Reinhold,
I'll bite.
I'm still looking at your 790mm F:5.4 Wollaston Meniscus lens, but don't have the money yet.
Maybe you can make a nice deal for me?
And can you give me some directions with these meniscus lenses on how to "homebuild" any lens out of it?
It doesn't have to be a professional one, but I would like to try to make one myself, just for the fun of it.
I can make a simple wooden "camera body" to stick it on and make large paper negatives. And if it might
work out all right, even use the paper negatives for alt photo techniques.
Would be a nice low-tech experiment to understand lenses better....
(I'll PM you as well - email sent)