Pin-hole camera exposure time?

Pin-hole camera exposure time?

Hello :) i am making a pin hole camera but I do not know how long should the exposure time be. May i ask if my pin hole is abt 0.1mm in diametre, and the distance between the hole and the film is about 28mm, how long should i expose the film under different conditions, such as on rainy days/ sunny days/ indoors? Thank you so much :)

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