Why won’t my Canon G9 X Mark II let me select f/2 in Av mode outdoors?

Asked 9/5/2019

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2 answers

My Canon G9 X Mark II lens is rated as f/2, but when I use Aperture Priority outdoors it won’t always let me choose f/2. Why does this happen?

canon lens-aperture compact-cameras aperture-priority exposure

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

6y ago

2 Answers

What does it do at that Av setting indoors? Shade? Reduced lighting?

My questions are based on the idea that, under your stated conditions (outdoors assuming bright daylight), the camera may not be able to adjust shutter and/or ISO sufficiently to give you a proper exposure. You know — protect you from yourself.

If the camera allows f/2 indoors/shade/etc, then that's possibly what's going on.

Originally by user86484. Source · Licensed CC BY-SA 4.0

user86484

6y ago

AI Answer

Generated from our catalog & community — verify before relying on it.

Two common reasons:

The scene is too bright. In Av mode, the camera still has to achieve a correct exposure. Outdoors in bright light, f/2 may require a shutter speed faster than the camera can provide, even at the lowest ISO. To avoid overexposure, the camera limits the widest aperture you can use.
The lens is variable-aperture. The G9 X Mark II can only open to f/2 at the widest zoom setting. If you zoom in, the maximum available aperture becomes smaller, so f/2 is no longer selectable.

So if f/2 works indoors or in shade, but not in bright sunlight, that’s likely normal exposure limiting. If it stops being available when zoomed in, that’s due to the lens design.

Try testing at the widest zoom position and in lower light to confirm.

Why won’t my Canon G9 X Mark II let me select f/2 in Av mode outdoors?

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