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                    Neutral Density Filters ZAB Series
Focus on Colored Glass Melting and Optical Filters Manufacturing for Over 30 years'.
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Our products neutral density filters ZAB Series are neutral filter glass with balanced blocking in the visible light, they are equivalent to filter glass NG Series of Germany Schott and optical lens ND series of Japan Hoya.
These filters possess level spectral transmittance characteristics in the visible region independent of wavelength. They are ideal for exposure control in color photography, and are also used for light control in other measuring instruments. They are designed to uphold designated performance capabilities through controlling the thickness.
Main Application: Camera Lens, Optical Instruments.
Type Thickness
A[2856k]
D65
Chemical Stability
ND
α×10-7
(℃)Tg (℃)
Ts (℃)
S
(mm)
x
y
Y
x
y
Y
DA
DW
ZAB00
0.5
5
3
1.527
65
469
582
2.46
ZAB02
1
5
3
1.514
65
469
582
2.41
ZAB2
2
0.447
0.396
1.1
0.306
0.315
1
5
3
1.509
65
469
582
2.43
ZAB5
2
5
4
1.505
65
469
582
2.42
ZAB10
2
0.434
0.402
9
0.297
0.314
8.9
1
3
1.526
65
469
582
2.52
ZAB25
2
0.442
0.408
25.7
0.308
0.327
25.4
5
3
1.502
65
469
582
2.41
ZAB30
2
1
3
1.523
65
469
582
2.52
ZAB50
2
0.444
0.408
45.7
0.31
0.329
45
5
3
1.502
65
469
582
2.41
ZAB65
2
1
3
1.521
65
469
582
2.52
ZAB70
2
0.499
0.41
70.2
0.316
0.385
68.7
5
3
1.502
65
469
582
2.41
Technical Standard of Neutral Density Filters
Type Thickness(mm)
TP(%)
QZ(%)
standard tolerance ZAB00
0.5
2
1.0~4.0
≤4.0
ZAB02
1
1.5
0.5~3.0
≤3.0
ZAB2
2
2
1.0~3.0
≤3.0
ZAB5
2
5
1.0~9.0
≤5.0
ZAB10
2
10
6.0~15.0
≤5.0
ZAB25
2
25
18.0~32.0
≤6.0
ZAB30
2
30
23.0~37.0
≤10.0
ZAB50
2
50
41.0~59.0
≤8.0
ZAB65
2
65
58.0~72.0
≤6.0
ZAB70
2
70
63.0~77.0
≤7.0
Quality Level of Neutral Density Filters
Type Bubble
Stripe
Stress
ZAB00
C-B
4
3
ZAB02
C-B
4
3
ZAB2
C-B
4
3
ZAB5
C-B
4
3
ZAB10
C-B
4
3
ZAB25
C-B
4
3
ZAB30
C-B
4
3
ZAB50
C-B
3C
3
ZAB65
C-B
3C
3
ZAB70
C-B
3C
3
  
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