Canon EF100mm f/2 USM Instruction - Page 9

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Canon EF100mm f/2 USM Instruction
7. Infinity Compensation
Mark

Infinity compensation mark

Distance index
To compensate for shifting of the infinity focus
point that results from changes in temperature.
The infinity position at normal temperature is the
point at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
For accurate manual focusing on subjects at
infinity distance, look through the viewfinder while
rotating the focusing ring.
8. Using the Tripod
Mount
(Sold separately)
To mount the lens on a tripod, Tripod mount ring B
(B) and the tripod mount adapter (sold separately) for
the EF100mm f/2.8 Macro USM will be necessary.
Tripod mount adapter
Mounting index
Tripod mount
attachment
lugs
Mounting lugs
• When switching to vertical shooting, rotate the
camera so that the grip is at the top. Rotating
the camera in the opposite direction will have
the grip bump into the tripod mount.
• Before attaching or detaching the lens, set the
tripod mount back to its normal position
(horizontal shooting position). Otherwise, the
tripod mount may bump into the camera grip or
pentaprism and prevent the lens from being
attached to or detached from the camera.
• If the EOS camera has a built-in flash, the
pentaprism may prevent the tripod mount from
being rotated to the top of the lens.
Tripod mount ring B (B)
Attachment
index
Locking
tab
Tripod mount
base
ENG-8