« on: January 23, 2012, 11:18:28 AM »
Aperture determines more than shutter speed. Most people don't buy an 85mm f/1.2L to use it in very low light (which turns out to be a good thing, because unknown to most people, when you shoot at f/1.2 on a dSLR your camera is actually bumping up the ISO to compensate for the fact that the sensor is less sensitive to light at very high incident angles, and not telling you...meaning over 1/2 a stop more noise in some cases).
Hmmm interesting. I never knew the camera did that. Now, when you say that the camera bumps up the ISO without telling you, does it only apply in settings where the camera meters for exposure, or does it do it for manual exposures as well? In other words, if I choose an ISO of 200 manually, would the camera actually shoot with ISO ~300?