Vivitar V-800MR Manual Do Utilizador

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Since the aperture of the reflex lens cannot be changed, the exposure is controlled entirely by the

shutter speed being used. The speed dial is set according to your TTL reading. Cameras with

automatic aperture and shutter priority will automatically set the right speed with their auto

exposure mechanisms, with the exception of a few models which require manual function.

With aperture priority or manual operation of your camera, the apropriate shutter speed must be

adjusted using three neutral density filters in case of over exposure readings or if the camera’s

LED warning light is activated. If your camera has a manual TTL system, then simply follow the exposure 

indicator in the viewfinder by compensating with the shutter speed. If there is excessive light beyond the 

shutter speed capability, then attach a Neutral Density filter to reduce the overall passage of light.

When using a camera with no TTL system and only a normal filter, the exposure must be stopped

down as indicated by the table on the following page to the shutter speed adusted as indicated

by an exposure meter reading. So, for example, with a 300mm f5.6 reflex lens, the setting would

be f5.6. If a Y52 filter is used in daylight, the stop down would be 1. Also, if the appropriate

shutter speed is metered as 1/1000 seconds using a single exposure meter with an f stop of 5.6,

then the shutter speed setting would be 1/500 seconds.