In April I turned the kitchen into a camera obscura. The whole room was filled with the image of the outside world, but the camera on my phone found it too difficult to capture.
I attached a weak lens to the aperture which produced a clear image at about a metre away.
The aperture was on a south facing window, which meant that the glare from the sun affected the clarity of the image. Next time I'll use a north facing window and hope that the spectacular sight of the room filled with the image will be light enough to capture on camera.