I just developed my first pinhole print. Results were less than amazing It's waaaay underesposed. It's my first try, though, so I'm not too disapointed.
The picture was of a couch in the living room. I figured out the exposure for f/16 and then used a little math to figure out that my exposure time of about 70 minutes. There's a bit of an image, but not much...
Share your math with us.
Also, don't forget to adjust for reciprocity failure.