Sony Vario-Tessar T* E 16-70mm f/4 ZA OSS Lens - Manual (Page 39)

39 GB Preparing
Moving the H lens shift significantly may cause
pale light to appear outside the effective area of
the screen. If this is a concern, install the light
shield.
After adjusting the projection position, zoom, and
focus, turn off the power and attach the light
shield to the lens of the projector.
If there is a pale light on the right side of the
screen
If there is a pale light on the left side of the
screen
Do not install the light shield if no light appears outside the
effective area of the screen. (If the light shield is installed in
this case, the edges of the image may get cut off or appear
dark.)
Installing the light shield
Note