If your subject is positioned in front of an exterior window with a bright outside background, and is therefore harshly back-lit, to properly expose your subject you could:
A) switch from auto-iris to manual, expose your subject properly,
Permitting the background to be overexposed
B) put sheets of neutral density filter on the window
C) increase the amount of light illuminating your subject
D) draw the drapes/curtains across the window
E) all of the above

Question

Quizplus · Accepted Answer

Switching to manual iris and properly exposing the subject will result in an overexposed background. Adding neutral density filters to the window or increasing the amount of artificial light can be effective solutions, but drawing the curtains or drapes across the window is the most straightforward approach to reducing the backlight and properly exposing the subject. Therefore, the best solution is to use all of the above methods, including drawing the curtains or drapes.

If Your Subject Is Positioned in Front of an Exterior