Vivitar V-800MR Manual Do Utilizador

-6-

 

NOTE: In order to compensate focusing when normal positioning may be altered due to extreme

temperature change, the focusing ring has been designed to allow rotation beyond the fixed

marks of the distance scale. To avoid mistakes, always focus while looking through the viewfinder.

NOTE: No adjustments in focusing are necessary when taking infrared photography as required

with normal lenses.

Since the reflex lens is not equipped with a diaphragm system, the use of filters plays an important factor in 

the control of light and contrast.

Normal (IA Skylight): This filter should be used when no other filters are necessary.

ND 2X & ND 4X (Neutral Density): These filters control the passage of light since no diaphragm

is provided in the lens. Exposure factor is 4X with a ND4X, so that the light intake through the

lens is decreased as if a similar lens were stopped-down by 2 stops. Note that ND filters reduce

light passage only, while the depth of field is not changed.