just made my own with aluminium can + paper folding thing...
used ISO400 kodak negative film
by trial and error.... my pinhole pointing towards the sun = 1 second...
so it is like... approximately 14 stops under 4/f (smena 8M towards sun = 1/250 + 16mm)
would like to share some images but no links are allowed coz i am new here
You should be able to attach an image to your post or if you have a flickr account, you can link to that. Shouldn't be a reason why you can't share your images.