Canon T 90 - Manual (Page 190)

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)
110