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8.3. Ground Glasses
The sensor aperture of the ARRIFLEX D-21 is
slightly different from the camera aperture of the
ANSI and DIN Super 35 format. Therefore, Super 35
ground glasses for ARRIFLEX 235/435/535 do not
provide exact frame markings in the D-21 viewfinder
image. For exact framing, only use ground glasses
that are listed for digital ARRIFLEX cameras. For
a list of available formats, please check the D-21
price list or the D-21 configuration overwiew.
Note: When set to HD Mode output, the D-21 delivers
images at 1.78:1 (16:9) aspect ratio using the full
sensor aperture width. To utilize the 1.33:1 (4:3)
area, it has to be set to Mscope or ARRIRAW
output (e.g. to shoot with anamorphic lenses)
Other aspect ratios (e.g. 1.85:1) can be achieved
by cropping the output image in postproduction.
Exchanging the Ground Glass
If the mirror shutter is not positioned in front of the
•
sensor, briefly press the PHASE button in standby so
the sensor cover glass is protected by the shutter.
Turn the camera off and disconnect
•
it from the power supply!
Remove the lens or the protective cap.
•
Using the
•
special forceps (Hirschmann clamp)
from the camera’s toolkit, pull the ground glass
out of the holder by its tongue
➪
image
.
Do not touch the mirror surface or the sensor
cover glass surface!
Check that the ground glass to be inserted as well
•
as the ground glass frame is completely clean.
With the
•
special forceps, push the chosen ground
glass into the holder as far as it will go. The red
marker point must be on the left looking into the
camera lens compartment. A ball catch fixes the
ground glass exactly in the right position.
Check that the ground glass is correctly locked in place.
•
Note: Cleaning or exchanging the field lens,
see chapter 15: Camera Care.
