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RE: 📷 Tubular - #PinholePhotography
focal length depends how far the hole is from the sensor. Guessing it's a flat DIY piece of paper or something, so it's about 35~45mm. (oh, bodycap, didn't read :P )
Aperture is about f/70~f/90 if hole is 0.5mm. Depends on the size of the hole.
:D
Yeah I measured the focal length to be around 20mm and the pinhole diameter 0.15mm, which is around f/133.