b-1
Appendix B : Focusing the Lens
5975948 RETRODATA 2100 210198
B
(c) Locking Fastener
Ring
(b) Main Lens Barrel
Tube
(a) Front Rotary Lens
Ring
Projector
Focusing can only be achieved through access at the rear of the
retro projector
1- Firstly ensure that the outer Front Rotary Lens Ring (a) is
completely turned in the clockwise direction
2- Loosen the Locking Fastener Ring (c) of the lens by turning
counter clockwise a sufficient amount to allow turning of the Main
Lens Barrel Tube (b).
3- Focus the image by turning the Main Lens Barrel Tube in the
clockwise or anti clockwise direction until the middle region of the
picture is focused. Attention : Do not turn out the lens too far,
otherwise it will fall out of the lens holder. Once the barrel is in the
desired position, lock the Fastener Ring (c) by turning clockwise
until fully locked.
4- It is now necessary to focus the corners of the picture by
adjusting the Front Rotary Lens Ring (a), moving the desired amount
in the anti clockwise direction.
FOCUSING THE LENS
