7. Place the next filter onto the bottom ring in the camera’s PL mount.
The Ground Glass/Frameglow tool has to be in the 12 o’clock
position (1):
8. Align the filter ring’s main notch with the bottom ring’s red nut in
the 6 o’clock position. To ensure an accurate fit, align the filter
ring’s other notches with the two red noses in the bottom ring’s
10:30 and 1:30 positions
9. After the magnetic filter ring has audibly snapped into position,
carefully unscrew the Ground Glass/Frameglow tool. The filter has
to sit precisely on the bottom ring
10. Mount a lens (observe maximum lens dimensions!), or cover the PL
lens mount properly with its lid (1).
Note: All internal filters require a properly shimmed lens mount (see Chapter
Shimming the lens mount on page 228).
To compensate for the change in flange focal depth due to the shim, always
insert the IFM Optical Clear filter when no filtering is needed.
When the camera is no longer shimmed for IFM-1, the glassless IFM Empty
Filter Frame must be placed back into the filter position.
Note: Internal filtration does not work with ALEXA Studio and ALEXA Studio
XT. For PL mount lenses, IFM-1 works only with a lens mounting depth of 31.50
mm maximum.
17.1.5 Filter cleansing
Tools needed:
Cleaning Instructions
Fresh rubber gloves
Micro bellows
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