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FV-5
Aperture priority
Lets you set the lens aperture manually.
Note
The Aperture priority mode (A) only applies to real cameras (not mobiles
phones). The aperture is not adjustable on mobile phones because mobile
camera modules have a fixed aperture. The aperture of the lens depends
approximately on the diameter of the lens. Conventional cameras with
adjustable aperture have blades that close or open to reduce or increase the
amount of light reaching the sensor, respectively. Those blades usually have
the look of the virtual shutter icon button that used on the app, but ironically,
mobile phones doesn't have such blades, nor any kind of device that is able
to close the diameter of the aperture. Therefore, the aperture is inherently
fixed on those camera modules, and therefore, no application will be able to
control the aperture. The aperture (F-number) shown is queried to the camera
driver, and it is also the maximum aperture, as, given the diameter of the lens,
cannot be larger, without building the lens differently.
The range of apertures available depends on the characteristics of the lens.
You can drag the marker over the aperture scale to adjust the aperture F
number. The selected value will be displayed on the top of the viewfinder.
Note
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Aperture limit based on
current focal length
FV-5
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