Lens Scales
Some lenses such as those from Cooke Optics, Zeiss Supreme, Supreme Radiance and CP.3
XD lenses running 1.90 firmware will provide not only their name, serial number, focus, iris and
zoom position to the camera but also their minimum focus distance and iris range extremes
as well as all of the specific focus distance marking points that are present on the barrel of
the lens. This means they will be displayed exactly the same way on the focus scale instantly
without needing to program them in at all.
TIP The focus markers overlay can also be sent to any output so you can see them
on the EVF, LCDs and any SDI monitor connected to your camera’s SDI outputs. To do
this, open your camera’s menu and go to page 2 of the setup settings. Here, choose
which output you want to view markers on and set the display to ‘focus markers’. Make
sure status text is also set to ‘on’.
Self Calibration
For other i/Data lenses that provide positional information electronically, but not information like
their focus and iris range, the camera is able to self calibrate for each lens, learn this information
and save it to its internal database. To do so after mounting the lens, simply move the lens
to each end point of its focus and iris adjustment range by moving the focus or iris ring. This
information will then be added to the scale and saved to the camera for next time this lens is
mounted. If you are on the 1st AC page when a lens like this is first mounted you will be able
to see this happening and see the scale expanding in front of you as you move the lens barrel
towards each end of its range.
It’s important to note that focus scales are only able to be shown for lenses that provide
accurate focus distance information to URSA Cine through the lens mount. This means regular
EF stills lenses that don’t supply this information will not show focus scales on the 1st AC Page.
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