Page 2.10
Rev E July 2014
2. Installation
Digital Projection
M-Vision Cine 230, Cine 260, Cine 400
User Manual
Shifting the image
Ideally, the projector should be positioned perpendicular to the screen.
The normal position for the projector is at the centre of the screen. However, with
the zoom lenses, you can set the projector above or below the centre, or to one
side, and adjust the image using the
Lens shift
controls on the top of the projector
to maintain a geometrically correct image.
The maximum range available with no distortion is dependent on which zoom lens is
used. The tables below show the maximum range for images that fill the DMD. For
images which do not use the full height or width, extra shift may be possible, up to
the limit of the lens mount movement.
1.56 - 1.86 : 1 zoom lens
vertical
(pixels)
horizontal
(pixels)
vertical
(vs DMD height)
horizontal
(vs DMD width)
+ 270
- 540
± 288
+ 0.25H (50%)
- 0.5H (100%)
± 0.15W (30%)
1.85 - 2.4 : 1 zoom lens
vertical
(pixels)
horizontal
(pixels)
vertical
(vs DMD height)
horizontal
(vs DMD width)
± 648
± 288
± 0.6H (120%)
± 0.15W (30%)
The image can be shifted by up to:
•
± 0.6 of the height of a full screen image (known as 120% shift)
•
± 0.15 of the width of a full screen image (known as 30%)
It is physically possible to shift the lens further than this, however there will be some
distortion of the image beyond the ranges specified above.
Horizontal shift
adjustment
Vertical shift
adjustment
(Remove
the badge)
Notes
If the projector is fitted with the
fixed 0.73:1 lens then there are
no mechanical controls for lens
shift.
Slide the badge in the
direction shown below, then
gently lift off by hand.
Do NOT prise off using a tool.
If the lens is to be shifted in
two directions combined, the
maximum range is somewhat
less, as can be seen below.
full horizontal or vertical shift
without distortion
combined shift
is reduced
