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 p.1 #18 · Anyone ever heard of Noktor? | |
Jman13 wrote:
You are confusing things and mixing up truth and falsehood. Sure, a larger sensor collects more total light, after that, you're wrong. The smaller sensor does NOT require higher signal amplification.
Yes it does. Fewer photons per pixel requires higher gain and gives more noise.
Exposure settings are based on Light per unit AREA, not total light.
Exactly, and a smaller area gives less information. Therefore ISO 100 on MFT is not equivalent to ISO 100 on FF.
(Your shutter speed is not dependent of sensor size...just ISO and f/stop.) Each sensel does not give a flying poop about what happens elsewhere on the sensor...that is exposure values are the same regardless of format. Now, TOTAL exposure is different, but that has nothing to do with the ISO. ISO is the relative sensitivity of the pixels, and for the same f/stop, the same intensity of light is hitting the sensor, regardless of format. So, for each area of the sensor, the same amount of light is being used to make the exposure.
This is what I tried to say. A smaller sensor is not equivalent to a larger sensor because of the different areas.
Now, when you are PRINTING, it makes a difference, becuase you're enlarging a smaller area to the same size print, so any noise on the smaller sensor is likewise magnified.
It makes a difference as soon as you look at the picture, whether printed or on your screen.
But to say that amplification is different is false. You're confusing that with the magnification of the sensor on print, which is, of course, different.
It's not false if both sensors have the same number of pixels.
To put it another way, if you took a film negative, at ISO 100, and cropped out the center, the ISO of the film wouldn't change, as it refers to the sensitivity of the grains to light, not the total amount of light collected by the frame.
Exactly. And in the same way, the larger the film, the higher ISO speed you can use without visible grain. You collect more photons and get more information to build your picture with.
Also, everything I said was true...the DOF of a 50mm f/1.4 will be the same on m4/3 as an identically framed 100 f/2.8 on full frame.
And since when does DOF depend on exposure? It depends on the size of the aperture opening and the distance of focus.
I'm sorry, but you seem to have no clue of what you are talking about. If there's no difference, why don't you just buy a point and shoot with a tiny sensor and an f/2 lens? Maybe you think it's just a coincidence that cameras with large sensors have lower noise?
I'm soooo tired of this stupid myth. I really hope no one buys it. Good night.
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