P3D Exposure clarification (was: Fed Boy)

[George Themelis <gthemelis@xxxxxxxxx>]

> I would have thought the hole would be larger at 400 ASA than 
> 100 ASA letting through more light so that the exposure is 
> shorter which is what the faster 400 ASA film requires. 

For the same amount of light, using a faster film (400 vs 100)
requires less exposure and this is achieved by either 1) closing
the aperture ("smaller hole") or 2) increasing the shutter
speed.

If the shutter speed is fixed, the "hole" should be smaller.

George

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George Themelis, DrT-3d@xxxxxxx
http://home.att.net/~drt-3d/
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