Canon Tele Super 55 Spesifikasi - Halaman 2
Jelajahi secara online atau unduh pdf Spesifikasi untuk Lensa Kamera Canon Tele Super 55. Canon Tele Super 55 4 halaman. Ultra telephoto zoom lens achieving 1480mm
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PJ55x13.5B IE 13.5-740mm 1:2.0
The "TELE Super 55" which features the incredible focal length of 740mm at the tele-end and 1,480mm with 2.0x extender, is
perfect for sports and other live events.The new and improved "TELE Super 55" can include Canon's optional "Crossover System"
which accommodates for the loss of wide angle in the 4:3 mode in some of the dual aspect ratio switchable camera systems.
The redesigned circuitry of the "TELE Super 55" realizes improvements in RF noise protection and its improved mechanical design
offers a modern look with easy accessibility for user friendly maintenance.
HIGH MTF PERFORMANCE
The next generation of 16:9 format has
become more widespread world-wide.
The height of the 16:9 format is 20%
shorter than that of the current 4:3
format, thus the scanning lines are 20%
greater(Fig.1). As a result, higher
resolution is required for the 16:9
format. In order to achieve this, the
TELE SUPER55 provides the
optimum balance of aberrations by Hi-
UD glasses (High Index Ultra Low
Dispersion glass) and Canon's unique
fluorite. The TELE SUPER55 succeeds
in having the higher MTF
performance, correspondent to 6MHz,
necessary for the 16:9 format.
DIMENSIONS
122
CANON "CROSSOVER" SYSTEM
All the Super series of lenses, including
the new TELE SUPER 55 are now
optionally available with
"CROSSOVER" compatibility. The 4
position extender turret incorporates a
0.8x "CROSSOVER" unit in addition
to the normal extenders i.e. 1.0x, 1.5x,
or 2.0x (Fig.2). When the CCD
switches to the 4:3 mode, the extender
turret rotates to the 0.8x position. The
0.8x "CROSSOVER" unit reduces the
diameter from 11mm to 9mm thus
shortening the focal length to produce
an identical picture angle. In essence,
the 0.8x "CROSSOVER" unit acts as a
1.0x extender for the switched 4:3
aspect ratio. Fig.3 shows the relation
between focal length and the
magnification of the extenders.
122
ULTRA TELEPHOTO
ZOOM LENS
ACHIEVING 1480mm
16:9 Scanning Lines
16:9
4:3
CROSSOVER SYSTEM
Crossover
(optional)
1X
1.5X
or Spare
0.8X
(Option)
2X
Fig.2
16:9 (dia 11mm)
Extender Focal Length
F stop
0.8X
1.0X
13.5-740mm
2.0
2.0X
4.0
27-1480mm
597.9
TELE SUPER
55
Fig.1
4:3 (dia 9mm)
Extender Focal Length
F stop
1.0X
11.1-611mm
2.0
1.2X
13.5-740mm
2.0
2.4X
4.0
27-1480mm
Fig.3
F.B.=48 in air