AAton XTR User Manual page 98

98
parallel to the ceiling.
Select the zoom lens that will be used most frequently with the ca-
mera; preferably the lens in your kit with the longest zoom ratio.
Mount the lens on the camera and tighten the lens lock ring mode-
rately.
Look through the viewfinder and set the zoom of the lens to its full
telephoto position. Focus the lens on the target and reposition the
camera body so that the center of the viewing screen cross-hair
exactly matches the center of the target.
Set the zoom to complete wide-angle position and notice that the
center of the target with relation to the viewing screen cross-hair will
track off in one direction. Without moving the camera steady, repo-
sition the lens and lens port ring until the target is centered. Using
an allen L wrench, carefully tighten the screws enough to secure the
lens port ring.
Set the zoom lens to telephoto position and check that the crosses
remain centered. If this is not the case, reposition the body, loosen
the screws slightly and repeat the above procedure. You will find
that, with each adjustment, you will come closer to the correct lens
centering.
When the cross on the target matches and holds its center through
extends out to its edges so
that the page is divided into
four equal quadrants. Tape or
pin the paper to the ceiling
directly above your working
surface.
Position the camera body un-
derneath the paper target wi-
th the lens port facing up to-
wards the target. Use a block
of wood or a spacer of sorts
to position the camera so that
the lens port is approximately