the off-axial adapter, there is a mark to indicate the mid-point of the adapter, and hence the
position of the tripod mount.
The horizontal turntable is engraved with marks in 5 degrees intervals, with long marks at
each 15 degree interval. Numerical values from 0 – 330 degrees are engraved in 30 degree
intervals in an anti-clockwise manner. Similar marks are also found on the vertical turntable.
But numerical values are not available.
There is also a groove on the horizontal rotator arm for you to stick a custom label for
your particular cameras, with and without vertical grip. So you don’t have to memorize the
numerical values for the horizontal adjustments. You can also put your name or any other
details on the label.
Installation
Installation is very easy as there are just a few parts and they come in semi-assembled
form. What you need to do is determine some dimensional constants of your camera-lens
combination, such as the entrance pupil position, height from base to the lens axis and the tripod
mount off-set distance. All these will determine the values of various adjustment of the bracket.
Horizontal Adjustment
For this you need to determine the height of your camera-lens combination from base of
camera to the lens axis.
where height = h
1
+ 1/2
Ф
Then you record this value so that you don’t have to do it again. For a Dimage 7, the
height is 45 mm. For Dimage A1, it is 32.5mm without BP-400 and 77mm with BP-400. For
E20, it is 35.5mm without the vertical grip.
Now, you look at the scale on the horizontal adjustment. For example, the picture below
shows a value of 8.0 cm or 80mm from the center of the horizontal turntable, i.e., the horizontal
position of the entrance pupil. However, this value does not correspond directly to the height