Nikon P8000 vs Canon G1X

Started 11 months ago | Discussions thread
Veteran MemberPosts: 5,138Gear list
Re: myth: larger sensor = more light
In reply to CAcreeks, 11 months ago

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].


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


P8000: 1.8

GX1 II: 2.0

 BorisK1's gear list:BorisK1's gear list
Olympus Tough TG-1 iHS Olympus E-3 Olympus Zuiko Digital ED 50mm 1:2.0 Macro Olympus Zuiko Digital ED 40-150mm 1:4.0-5.6 Olympus Zuiko Digital 11-22mm 1:2.8-3.5
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow