pinhole camera exposure times

image taken from http://www.pinholecamera.com/exposure.htmlFilm Speed (ISO) 400 Negative Film

 CAMERA TYPE Ultra-Wide Angle  Wide Angle Normal Telephoto
 Type of Light
 Bright Sun
Normal scene
 2 secs.  2 secs.   3 secs.  4 secs.
 Cloudy Day  6 secs.  6 secs.  10 secs.  12 secs.

Film Speed (ISO) 100 Negative Film

 CAMERA TYPE Ultra-Wide Angle  Wide Angle Normal Telephoto
 Type of Light
 Bright Sun
Normal scene
 8 secs.  8 secs.   12 secs.  16 secs.
 Cloudy Day  25 secs.  25 secs.  40 secs.  48 secs.

Film Speed (ISO) 50 Negative Film

 CAMERA TYPE Ultra-Wide Angle  Wide Angle Normal Telephoto
 Type of Light
 Bright Sun
Normal scene
 16 secs.  16 secs.   24 secs.  32 secs.
 Cloudy Day  50 secs.  50 secs.   1 min. 20 secs.   1 min. 36
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