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Turpol Diaphragms
Position |
Diameter |
Comment |
1 |
10" |
double |
2 |
7.5" |
double |
3 |
open |
|
4 |
37.5" |
single |
5 |
22.5" |
single |
6 |
15.0" |
single |
7 |
12.5" |
single |
0 |
5.25" |
double, photometry only |
Double diaphragms are available for polarimetry and sky chopping
photometry. Distance between hole centers is 15". NB! Note that for
polarimetry only diaphragms #1 and #2 should be used.
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