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13.3. Cleaning the Field Lens
If the mirror shutter is in front of the imager,
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briefly press the PHASE button. The shutter
is positioned to protect the mirror surface
from damage as far as possible.
Before cleaning the field lens, switch the
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camera’s main switch off and disconnect
the camera from the power supply!
Remove the lens or the protective cap.
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Do not touch the sensor or the mirror surface!
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Using the
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special forceps (Hirschmann clamp)
from the camera’s toolkit, pull the ground
glass out of the holder by its tongue.
Using the
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special forceps, first lift the field lens
upwards by its tongue then pull it out of its holder.
Clean the field lens with a dry, lint-free cloth.
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Check that ground glass and field lens to
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be inserted are completely clean.
Using the
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special forceps, push the field lens 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 field lens in the correct position.
Check that the field lens is locked in place.
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With the
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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.
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