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Film speed (ISO) – Determines the film power (i.e. sensitivity). Smaller values make the image darker, while larger values make it brighter. For more information, see  Exposure Control: the Film Speed (ISO) example example below.

F-Number – – Determines the width of the camera aperture and, indirectly, exposure. If the Exposure the Exposure option is checked, changing the F F-number will will affect the image brightness.  For For more information, see Exposure Control - fsee the F-number (s-top) example below below.

Shutter speed (s^-1) – – Specifies the shutter speed, in inverse seconds, for the still photographic camera. For example, shutter speed of 1/30 s corresponds to a value of 30 for 30 for this parameter.  For For more information, see Exposure Control - see the Shutter Speed example example below.

Shutter angle (deg) – – Specifies the shutter angle (in degrees) for the movie camera.

Shutter offset (deg)  – Specifies the shutter offset (in degrees) for the movie camera.

Latency (s) – Specifies the CCD matrix latency (in seconds) for the movie camera.

Latency (s) – Specifies the CCD matrix latency (in seconds) when the camera mode is set to Video cam.

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when the camera mode is set to Video cam.

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Aperture F-number vs Shutter Speed vs ISO
Cheat Sheet

 

The main options that control the brightness of a V-Ray Physical camera are Aperture F-number, Shutter Speed and ISO. They affect each other and you need  to balance their values according to your scene. Keep in mind that these settings do not correspond to those of a real-life camera. They apply only to the V-Ray Physical camera.

 

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  • F-number determines the size of the opening in the camera lens. The number refers to the ratio between the aperture's focal length and the actual diameter of the aperture. A smaller F-number means a larger aperture. The larger the Aperture, the brighter the scene becomes but that also introduces more Depth of field.

  • Shutter Speed determines how long the lens stays open when taking the photo. The numbers refer to fractions of a second. The slower the Shutter Speed, the brighter the scene becomes but that also introduces Motion Blur.

  • ISO determines the camera's sensitivity to light. Lowering the ISO means that more light is needed to achieve good lighting. Increasing the ISO means that less light is needed to achieve good lighting. A day scene, lit with a V-Ray Sun, for instance, looks best when captured with around 100 ISO.
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Shutter speed is 4.0

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Shutter speed is 8.0

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Shutter speed is 15.0

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DoF & Motion blur

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Depth of field – Enables the depth of field effect. Note that depth of field depends on the Focus distance and F-Number parameters. For more details, see the Depth of Field examples below.

Motion blur – Enables motion blur. Note that motion blur depends on how fast the objects are moving, as well as the camera's Shutter settings. For more details, see the Motion blur examples below.

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