Comparing Olympus 4/3lenses to FX "Full Frame" offerings

Started Jan 25, 2014 | Discussions thread
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Jay Ell Regular Member • Posts: 256
Re: Bzzt.

Tiger1 wrote:

.

ISO measures the camera medium's (digital sensor or film) sensitivity to light.

I've understand that the sensors have a fixed sensitivity and typically capture about 50% of the light that goes past the colour filter. I've read this from many places. I must have misunderstood something - maybe you can help?

It actually looks at sensitivity of light per unit area like I've been saying rather than total light over sensor or film. So cameras of equal iso will have equally sensitive sensors.

I had the chance of looking at the ISO standard and all it talked about was about JPEG-images - I didn't see anything about RAW - does this matter?

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