Canon BU-51H Pocket Manual - Page 16

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Canon BU-51H Pocket Manual
HDTV Optical Accessories
Tele-Side Converter
Focal length is shifted to the telephoto side by a
T15 HD
factor of 1.5x
F No. of the original lens is not affected
Only the telephoto side of the lens can be used,
the picture corners are eclipsed at wide angle
Adapter 85 II
The minimum object distance becomes 2.25 times
98 II
that of the original lens.
Wide Converter
W80 HD
Focal length becomes wider by a factor of 0.8X that
of the original lens with W80 HD
F No. of the original lens is not affected
Adapter 85 II
98 II
Wide Attachment
WA75 HD
The zoom lens becomes a wider fixed focal length
lens with the wide attachment
The focal length is widened by a factor of 0.75x
that of the original lens
Adapter 85 II
Focus is adjusted by use of the macro lever
98 II
Fish-Eye Attachment
Example: HJ17ex7.6B with fish-eye attachment
FEA HD
Focal Length
Zooming
Adapter 85 II
Focus adjustment
98 II
30
4.6mm, fixed
focal length
Not possible
By Macro mechanism
SDTV Optical Accessories
Tele-Side Converter
Combination
J17ex7.7B + T15-II/85II
T15-II
J22ex7.6B + T15-II/98II
YJ20x8.5B + T15-II/85II
Adapter 85 II
98 II
Wide Converter
Combination
J17ex7.7B + W80-IIIB/85II 7.7 to 131mm 6.2 to 104.8mm
J22ex7.6B + W80-IIIB /98II 7.6 to 168mm 6.0 to 132mm
W80-III B
YJ20x8.5B + W80Y-85
*W80Y-85
Focal Length
Minimum Object
Distance
Adapter 85 II
Zooming
98 II
F-number
*W80Y-85 is exclusively for 20X and 19X series and does not require an adapter.
Wide Attachment
WA75-II
Focal Lens
Close-Up
distance
Zooming
Adapter 85 II
Focus
98 II
adjustment
Fish-Eye Attachment
FEA-III B
Focal Length
Zooming
Focus adjustment
Adapter 85 II
98 II
M.O.D.
Eclipse Point
1.35m
f : 60mm
1.8m
f : 60mm
2.00m
f : 80mm
Master Lens
With Wide
Converter Attached
9 to 171mm
7.2 to 136.8mm
0.8X
(Magnification) 2 X
(Minimum object
distance of master lens)
Usual operation
Same as usual
Changes caused
Example:
by attachment
when used w/
J17ex7.7B lens
Fixed Focal Length
Fixed focal
(magnification) X
length
(wide angle focal length)
Approx. 5.8mm
Close-Up distance of
30mm
Macro feature
Not possible
Not Possible
By Macro mechanism
By Macro
F.B. adjustment
mechanism
Example: J17ex7.7B with fish-eye attachment
4.6mm, fixed
focal length
Not possible
By Macro mechanism
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