The invention provides a wearable device, such as a watch, that provides a way to calculate an appropriate camera shutter speed and aperture setting for a given ISO speed setting to obtain settings that, when entered into a camera, will result in an appropriate photographic exposure. The devices of the invention provide a simple, fast, convenient way to calculate appropriate settings for the components of the photographic exposure triangle.

The invention provides a wearable device, such as a watch, that provides a way to calculate an appropriate camera shutter speed and aperture setting for a given ISO speed setting to obtain settings that, when entered into a camera, will result in an appropriate photographic exposure. The devices of the invention provide a simple, fast, convenient way to calculate appropriate settings for the components of the photographic exposure triangle.

A device for setting watches arranged to be pressed onto a crystal of a watch and including plural display mechanisms. The device is arranged to enable the user to see the display mechanisms of the watch as they are set.

A timer kit comprises a battery powered timer and a caddy assembly. The battery powered timer has a colored disk attached to a rotatable shaft. The initial position of the colored disk is manually set by an operator using a positioner accessible through a circular opening extending through a front wall of the caddy assembly. The battery powered timer is removable from the caddy assembly in a generally vertical direction behind the front wall of the caddy assembly. The caddy assembly has a receptable for holding the battery powered timer in a generally vertical orientation behind the front wall of the caddy assembly.

A timer kit comprises a battery powered timer and a caddy assembly. The battery powered timer has a colored disk attached to a rotatable shaft. The initial position of the colored disk is manually set by an operator using a positioner accessible through a circular opening extending through a front wall of the caddy assembly. The battery powered timer is removable from the caddy assembly in a generally vertical direction behind the front wall of the caddy assembly. The caddy assembly has a receptable for holding the battery powered timer in a generally vertical orientation behind the front wall of the caddy assembly.