AJA CION, Руководство по эксплуатации

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CION v1.1 www.aja.com 80
Chapter 7: Using AJA Optional Accessories
Overview
CION’s design allows a variety of accessories to be used with the device. AJA provides
some of these accessories as optional items that may be purchased separately. These
accessories include the following:
Back-Focus Tool
Figure 26. Back-Focus Tool
Technically the Back-Focus Tool is used to adjust the focal flange distance for CION. The
Back Focus Access Door is found at the front of CION. The included Top Handle must be
removed to access this door.
To remove the Top Handle, first unscrew the rod end cap at the front of the handle, then
loosen the rod clamp that holds the handle in place. Remove the handle and attached
LANC Collar and set these items aside.
Next, remove the 4x 1/4-20 scews that fasten the top handle base to the top cheese
plate. The Back Focus Access Door is held in place by 2x Torx T10 headed screws. Remove
these screws and set them aside. The Back Focus Access Door may now be removed. Set
it aside and you will see the adjustment ring.
To make adjustments to the focal flange distance, insert the metal shaft of the tool into
one of the round indentations found on the adjustment ring. With a suitable target
placed in front of the lens to judge the adjustment. This may be a null target with
Siemens star or other pattern or a dedicated calibration tool such as the Denz FDC. If
these types of devices are not available, you may use medium/telephoto lens attached to
the camera with the aperture wide open and perform measurement and focus checks
until you achieve consistent results with the Back-Focus Tool. Note that this method
assumes that the lens is properly collimated and has accurate witness marks.
After you have finished making adjustments to focal flange distance for CION, replace the
Back Focus Access Door by securing it with the 2x Torx T10 screws and replace the top
handle of CION by re-attaching it with the 4x 1/4-20 screws.