


|
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.
| |