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Lens performance
Ghost/Flare
Point light source
Surface light source
Distortion
Dust in a picture
Lens barrel
Image blurring
・ No outstanding ghost/flare.
・ No outstanding flare at the center.
(Take pictures against light by horizontal/vertical shooting
positions in a good weather. Make a check of pictures through
the monitor.)
(Make a check at full aperture "with" and "without ND".)
(Make a check of the whole area of FOCUS/ZOOM.)
(Take pictures of the object with high luminance at periphery and
low luminance at center, and the object with adverse condition.
Make a check of the pictures through the monitor.)
・ No outstanding deformation.
(Take pictures of the linear object at horizontal/vertical shooting
positions.)
・ No outstanding dust in a picture.
・Zone I : Central area of the screen (i.e. circled area of which the
diameter length is approx. 80% of the shorter side of the screen.)
Zone II: the other peripheral areas of the screen.
The light reduction against the periphery is as follows :
a
Zone I
4 or less
Zone II
10 or less
a: 1.5% or less
b : More than 1.5% and less than 3.0%
(Take pictures of the 5100K viewer with full aperture at "T"-end,
and both "with" and "without ND". Make a check of the images.)
(Check them on PC.)
・ Deviation amount at center of the image blurring when zooming
"W ⇔ T": 2.5% or less of shorter length of the screen.
・ No abnormal operation e.g.) image slant, "caught-in-mechanism"
motion.
(Align the center positions of "W" and "T" and make a check of
the image blurring at center during zoom operation.)
(Display a through-the-monitor image on the 20-inch monitor.)
(By changing the posture of taking pictures, make a check in all
directions.)
- R5･ S1 -
Criteria
b
0
2 or less
VAA35001-R.3666.A
Tools
Visual check
Photoshop
CRT monitor
PC
Special chart
20-inch monitor
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