Manfrotto 303 Manual Del Usuario página 7

The "VR" kit is designed to allow virtual scenes to be created by Computer from a
panoramic sequence of digital or digitised photographs.
There are three requirements to achieve good panoramic sequence shots:
1. Accurately levelling of the panoramic axis.
2. A Panoramic head that enables you to choose the angle of rotation between
one shot and the next.
3. The ability to position the camera in the "Nodal Point" of the lens (the front
lens), exactly above the panoramic axis of rotation, to eliminate any parallax
problems between the closest and the furthest objects in the scene.
The "VR" Kit comprises three main modules that perform the above mentioned 2-
3 functions:
For the 1 function (accurately levelling), you should use the levelling devices
available on the Manfrotto range
1
REFER TO FIGURE :
1. A levelling base (not supplied) with a 3/8" screw for mounting.
2. A Panoramic Head which can adjust the angle of rotation or the number of
shots to complete the 360° pan.
3. Camera Support Bracket "R" with 1/4inch camera fixing screw "B" which is
mounted onto a double sliding plate "S" and "P" to position the "Nodal Point".
The Camera Support Bracket "R" has a quick release plate for switching rapidly
from the vertical to the horizontal shot format.
1- MOUNTING AND PAN LEVELLING
Mount the panoramic head on the levelling device (not supplied) and level the
system.
2- POSITIONING THE "NODAL POINT":
Mount the camera on the "Camera Support Bracket" "R" in vertical position
(see Art.340-USA 3288 instructions included)
To position the "Nodal Point" of the photographic lens exactly above the
panoramic axis of rotation the two Sliding Plates "S" and "P" located on the
upper part of the KIT are used:
GB
- Art. 303:
Unscrew knobs "O" and slide out the plate "S" or "P"
Do not push the stop button "I" to avoid accidental falling down
- Art. 303PLUS:
Each sliding plate can be moved either micrometricly or quickly.
To achieve micrometric movement, firstly ensure that the locking knob "Z" is
loosened.
Next rotate one of the two knobs "Y", the sliding is approximately 1,25mm per
knob turn.
To achieve QUICK movement, firstly ensure that the locking knob "Z" is
loosened.
Next rotate button "K" as shown in fig.1 whilst simultaneously sliding out the
plate "S" or "P".
• Rough initial positioning is achieved as follows
1. (Ref. figure 2): Once the camera is mounted on the "Camera Support
Bracket" "R", align the optical axis of the camera "M" with the panoramic
axis of rotation "N", by moving Sliding Plate "S" laterally.
2. (Ref. figure 3): Align the longitudinal plane by adjusting the lower Sliding "P"
until the front lens "Q" is placed above the panoramic axis of rotation "N".
At this point, the position is already able to handle QTVR panning of landscapes
or outdoor shots.
• Accurate positioning: if the scene being shot contains objects at varying
distances from the point where the shot is being taken
(close and distant objects), the "Nodal Point" needs to be more accurately
4 4A 4B
positioned as follows
1. (Ref. figure 4): choose a frame that contains both the nearest object "1" and
a furthest object "2" situated along the same line of vision.
2. (see figure 4A and 4B): move the camera on its panoramic axis bringing the
two objects first to the left and then to the right of the frame, checking
whether their relative distance "X" varies in the two frames: the more the
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