Zeiss T* ZM-Mount Lenses, Instruction Manual, Page: 20 / 115

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Attaching and removing the lens
Grip the lens at the grooves of the depth of field ring.
Align the blue index dot on the lens with the index on the
camera body. Turn the lens clockwise (seen from the front)
until it clicks and the lens is locked.
Remove the lens by gripping it at the grooves of the
depth of field ring. Turn the lens counterclockwise while
depressing the lens release knob on the camera.
Attaching and removing filters, lens hood
Standard filters can be attached to the front of the lens.
Do not use more than one filter, otherwise vignetting
may occur.
When the hood should be attached, align the white dot
on the hood with the aperture index on the lens. Turn the
hood clockwise until it clicks and the hood is locked. Re-
move the hood by pushing it towards the lens while turn-
ing counterclockwise.