Nikon P8000 vs Canon G1X

Started Mar 5, 2014 | Discussions thread
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BorisK1 Veteran Member • Posts: 5,361
Re: myth: larger sensor = more light

CAcreeks wrote:

BorisK1 wrote:

If you have two sensors, illuminated with the light of same brightness, the larger sensor will receive proportionally more photons.

With the same lens, yes.

But the two cameras in question do not have the same lens.

For the same angle of view, f/3.5 on either camera will gather the same amount of light.

Only if the cameras have the same aperture areas, which is not the case. Run the numbers yourself.

GX1's aperture area is 30mm[^2], P8000's aperture area is 19mm[^2].

[edit]:

I calculated the lens aperture area using the formula from the article you quoted:

Where f is focal length and N is the f-number

Actual focal length for 24mm:
P8000 1' sensor: 24/2.7=8.9mm
GX1 II 1.5' sensor: 12.5mm

F-numbers:

P8000: 1.8

GX1 II: 2.0

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