I had a (as I thought) nice idea fot the iPad and my darkroom :
Slideshow, black slide, pic, pic… (as long as needed for the exposure), black slide, stop
while putting a film or photopaper on the screen. A contact copy.
But – the image was out of focus. Very out of focus.
After a long quest I found a probable cause (I think) in a forum.
The display is beneath a glas screen. Here the light gets diffused – and the image gets unsharp…
So :
No more tries.