Light And Contrast Control; Filters; Exposure Or Aperture Adjustment With Ttl Cameras - Starblitz STARlens SL900F8 Mode D'emploi

 NOTE: No adjustment of focusing is necessary when
EN
taking infrared photography, as is required with nor-
mal lenses.
FR

Light and contrast control

Since the reflex lens is not equipped with a dia-
phragm system, the use of filters plays and impor-
ES
tant factor in the control of light and contrast.

Filters

Normal(lA Skylight):This filter should be used whe-
never no other filter is necessary.
ND 2X and ND(neutral Density):These filters control
the light passage since no diaphragm system is pro-
vided in the reflex lens. Exposure factor is 4 times
with a ND4X, i.e,the light intake through the lens is
decreased similarly as it, stopping down a normal
lens with an aperture, by 2 stops.
4
 NOTE: ND Filters reduce light passage only, and the
depth of field cannot be changed.
Exposure or aperture adjustment
with TTL cameras
Since the aperture of the reflex lens cannot be
changed. the exposure is controlled entirely upon
the shutter-speed being used. The speed-dial is set
according to your TTL reading . Both aperture and
shutter priority automatic cameras will automatical-
ly set the right speed with its auto-exposure mecha-
nism, except a few models which it is necessary to
operate on a manual function.
In aperture priority or manual operation of a camera,
appropriate shutter speed must be adjusted using 3
neutral density filter in case of over-exposure rea-
dings or the camera's LED warning light is activated.
lfyour camera is a manual TTL system, then simply
follow the exposure indicator in the viewfinder by
compensating with the shutter-speed. In case of
excessive light beyond the shutter speed capability.