Exposure Basics, lesson three?

Started Mar 18, 2013 | Discussions thread
Dennis Forum Pro • Posts: 18,789
Re: Quick correction.

richarddd wrote:

The more light on the sensor, the less noise but more possibility of blown highlights. Aperture and shutter speed (and available light) control how much light falls on the sensor.

I don't think I'd talk about it in terms of possibility; that suggests a randomness to something that you should strive to control. More light on sensor means less noise; too much light on sensor means blown highlights.  You can also see blown highlights if you set the ISO too high (in which case there would not have been too much light on the sensor).  (And blown highlights can, of course, be present in a "properly" exposed picture - avoiding them is not always the most important thing).

- Dennis

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