Nikon P8000 vs Canon G1X

Started 9 months ago | Discussions thread
CAcreeks
Veteran MemberPosts: 6,812
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myth: larger sensor = more light
In reply to BorisK1, 9 months ago

BorisK1 wrote:

We aren't speaking of total light here, but of the amount of light falling on a certain surface.

Not "We". You are talking about the amount of light per unit area. Which is determined by the actual aperture value.

I was talking about the overall amount of light. Which is what you get when you take the light per unit area and multiply it by the area in question.

I think if you run the math, you find that larger formats do not gather more light (focal-plane illuminance) even though their equivalent F stop is larger diameter.

http://en.wikipedia.org/wiki/Aperture#Aperture_area

The equations you ran do indicate relative DOF.

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