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Handbook: 193 of 287
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TABLE OF LUXFER PRISM PRESCRIPTIONS.
HIGHEST LIGHT 10° BELOW HORIZONTAL.
Zenith- |
Inclination of Lowest Light Below Horizontal. |
tangent |
|
20° | | |
25° | | |
30° | | |
35° | | |
40° | | |
45° | | |
.50 |
A | |
A | |
A | |
A | |
A | |
A | |
.60 |
A | |
A | |
A | |
A | |
A | |
A | |
.70 |
S | |
S | O |
S | M |
S | L |
S | K |
S | J |
.80 |
O | |
O | |
O | M |
O | L |
O | K |
O | J |
.90 |
N | |
N | |
N | M |
N | L |
N | K |
N | J |
1.00 |
N | |
N | |
N | M |
N | L |
N | K |
N | J |
1.10 |
M | |
M | |
M | |
M | L |
M | K |
M | J |
1.15 |
M | |
M | |
M | |
M | L |
M | K |
M | J |
1.20 |
L | |
L | |
L | |
L | |
L | K |
L | J |
1.25 |
L | |
L | |
L | |
L | |
L | K |
L | J |
1.30 |
L | |
L | |
L | |
L | |
L | K |
L | J |
1.35 |
L | |
L | |
L | |
L | |
L | K |
L | J |
1.40 |
L | |
L | |
L | |
L | |
L | K |
L | J |
1.50 |
L | |
L | |
L | |
L | |
L | K |
L | J |
1.60 |
K | |
K | |
K | |
K | |
K | |
K | J |
1.70 |
K | |
K | |
K | |
K | |
K | |
K | J |
1.80 |
K | |
K | |
K | |
K | |
K | |
K | J |
1.90 |
K | |
K | |
K | |
K | |
K | |
K | J |
2.00 |
K | |
K | |
K | |
K | |
K | |
K | J |
2.25 |
J | |
J | |
J | |
J | |
J | |
J | |
2.50 |
J | |
J | |
J | |
J | |
J | |
J | |
2.75 |
J | |
J | |
J | |
J | |
J | |
J | |
3.00 |
J | |
J | |
J | |
J | |
J | |
J | |
3.50 |
J | |
J | |
J | |
J | |
J | |
J | |
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