I found my pinhole "lens" (it's a metal plate with a tiny hole) and attached it to a EOS body cap. Here are some sample results ...
Doesn't look like much but works ;)
... tommorow I'll take it for a walk and see what it can do in daylight.
[UPDATE]
So I did test it in daylight and unfortunatelly it's was not good at all ;)
The metal plate was to far from the sensor which resulted in worse focus and strong enlargement of the picture ...
I've fixed it ...
... looks even worse then before but the field of view is much better ...
... we'll see tommorow if it'll work like it should ...