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Making Adjustments
Adjusting the Focal Balance (Only for ET-ELW30C, ET-ELW31C)
The focal balance between the center and periphery of the projected image changes
depending on the size of the projected image.
The lens is equipped with a focus balance adjustment function for the screen periphery.
Procedure for adjusting the focal balance
J
Index line
Projected image size
Specifications
Please check the projection lens specifications and use the appropriate projection lens
depending on the usage condition.
Model No.
Lens Type
F value
Focal Length (f)
Width
Height
Dimensions
Depth 194.5 mm (7-21/32") 194 mm (7-5/8")
Net Weight
Note
For about the projection distance, see "Setting up" in the operating instructions for the projector
z
you are using.
6 - ENGLISH
Periphery focus
adjustment ring
ET-ELW31C
Short focus
zoom lens
F 1.7 to 2.0
10.46 to 13.61 mm 13.09 to 17.03 mm 31.34 to 56.79 mm 56.41 to 101.66 mm
127.4 mm (5")
127.4 mm (5")
(excluding protrusion)
(excluding protrusion)
Approx. 1.2 k ]
(2.6 lbs)
1) Turn the periphery focus adjustment ring
(the laurette ring in the middle of the lens)
to adjust the index line to the projected
image size (between 40" and 400").
For example, when the projected image size is
z
250", adjust the index line to between 100" and
400".
2) Adjust the projected image size to match
the screen by operating the projector.
3) Adjust the focus by operating the projec-
tor.
ET-ELW30C
Short focus
zoom lens
F 1.7 to 1.99
F 1.7 to 2.24
110 mm (4-11/32")
127.4 mm (5")
(excluding protrusion)
127.4 mm (5")
110 mm (4-11/32") 110 mm (4-11/32")
Approx. 1.2 k ]
Approx. 1.52 k ]
(2.6 lbs)
ET-ELT30C
ET-ELT31C
Long focus
Ultra long focus
zoom lens
zoom lens
F 1.7 to 2.3
110 mm (4-11/32")
(excluding protrusion)
205.1 mm
214.5 mm (8-7/16")
(8-1/16")
Approx. 1.55 k ]
(3.4 lbs)
(3.4 lb)
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