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I want to do hand-held, natural-light photography in low-light situations, e.g. inside a room with a small window on a rainy day. No tripod, no flash.
Canon claims that their "Optical Image Stabilizer provides up to 4 shutter speed stops of correction". Disregarding all other lens quality factors (such as chromatic aberration), what serves best to neutralize an unsteady hand and camera shake -- a large aperture or image stabilization?
Sample configurations for comparison could be:
- 24mm f/1.4 without image stabilization
- 24mm f/2.8 with image stabilization
Note: I really and truly do not want additional light or alternatives to a tripod that I can place the camera on. I want to capture the natural light. That is the main objective of my photography. And I constantly move around quickly (because I photograph people in motion), so putting the camera in a stable position is not an option. In your answers, please reflect the limitations I set in my question. They are conscious and have a reason. Thank you.