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| how to adjust the aperture (diaphragm) |
 |
| diaphragm iris on the inside |
 |
| diaphragm iris on the outside |
08/12/2010
PETRI 7 - EXTERIOR LENS
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|
| how to adjust the aperture (diaphragm) |
|
| diaphragm iris on the inside |
|
| diaphragm iris on the outside |
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