Canon T 90 User Manual
Page 190
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5. When Using the Canon Extenders
Exposure compensation may be necessary
when using the Canon Extenders with the
T90. Coirrect the exposure by using the expo
sure compensation index as follows:
Extender
Lens
The max.
aperture of
the lens
T90’s metering mode
Center-weighted
average
Partial
Spot
2X-A
Single
All lenses
0
—2/3 step
—2/3 step
Zoom
All lenses
0
—2/3 step
—1/3 step
2X-B
Single
f/1.2-f/2.0
-1-2/3 step
-1-2/3 step
-1-1/3 step
f/2.5-f/2.8
-L2/3 step
0
0
f/3.5 or slower
0
0
0
Zoom
All lenses
-1-1/3 step
— 1/3 step
0
1.4X
Single
All lenses
0
—2/3 step
—2/3 step
Zoom
All lenses
0
0
0
• •+” means increasing the expwsure.
•
" means decreasing the exposure. (-* p.86)
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