Tamron 672D - Manual (Page 6)

MACRO SWITCHOVER MECHANISM
The model 672D allows macro photography by operating the macro selector switch. The
maximum magnification ratio in the macro photography mode is 1:2 (f = 300 mm, 0.95m).
It is necessary that the zoom be aligned to 180-300 mm when switching the macro
selector switch from Normal to Macro. In addition, it is necessary that the focus ring be
aligned to 1.5 m to infinity to switch from Macro to Normal.
SWITCHING TO MACRO PHOTOGRAPHY
First, turn the zoom ring to align the zoom between 180 and 300mm. Next, slide the macro
selector switch from the Normal to the Macro position. The lens is now switched to the
macro photography mode.
When in the macro photography mode, the focus ring rotates continuously from
infinity to the minimum focus distance of 0.95m. The magnification ratio reaches a maxi-
mum when the focus distance is 0.95 m at 300 mm. The magnification ratio at this time is
1:2.
When in the macro photography mode, the zoom ring can only be rotated over the
range of 180mm and 300mm. Angle of view can only be adjusted over the range of 180mm
to 300mm when in the macro photography mode.
The macro selector switch cannot be operated unless the zoom ring is between
180mm and 300mm. Always make sure to align the zoom ring between 180mm and
300mm before operating the macro selector switch
.
CANCELLATION OF MACRO PHOTOGRAPHY
First check that the focus ring is aligned to 1.5m or farther (1.5 - infinity). (Turn the focus
ring to 1.5m or farther when it is set to a distance closer than 1.5m). Next, slide the macro
selector switch from the Macro position to the Normal position. The macro photography
mode is now cancelled.
The focus ring can only be turned between infinity and 1.5m when the macro selector
switch is set to the Normal position (when macro photography is cancelled.) It cannot be
turned to a distance closer than 1.5m.
The macro selector switch cannot be operated unless the focus ring is set to a dis-
tance between 1.5m and infinity. Always make sure to set the focus ring between 1.5m and
infinity before operating the macro selector switch.