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doc:appunti:hardware:olympus-e-m10-mark-ii [2020/06/16 23:52]
niccolo [F-Stop Values]
doc:appunti:hardware:olympus-e-m10-mark-ii [2020/06/17 11:54]
niccolo [F-Stop Values]
Line 112: Line 112:
 ===== F-Stop Values ===== ===== F-Stop Values =====
  
-Traditionally the **f-stop scale** is composed of values which distantiate each other by halving the light that is allowed to come in. A value of **f 1.0** means that the lens aperture (the hole diameter) is equal to the focal lenght. Each following stop value is obtained by multiplying the previous one by **the square root of 2**. So the value **f 1.4** means that the aperture is obtained by dividing the focal lenght by 1.4, and so on with **2.0**, **2.8**, **4.0**, **5.7**, ... The minimum aperture is usually **f 16** or **22**.+Traditionally the **f-stop scale** is composed of values which distantiate each other by halving the light that is allowed to come in. A value of **f/1.0** means that the lens aperture (the hole diameter) is equal to the focal lenght. Each following stop value is obtained by multiplying the previous one by **the square root of 2**. So the value **f/1.4** means that the aperture is obtained by dividing the focal lenght by 1.4, and so on with **f/2.0**, **f/2.8**, **f/4.0**, **f/5.7**, ... The minimum aperture is usually obtained dividing the focal lenght by 16 or 22, thus the **f/16** or **f/22**.
  
 The Olympus E-M10 have aprture stops at 1/3 of each full stop values: The Olympus E-M10 have aprture stops at 1/3 of each full stop values:
  
-^  Full F-Stop  ^  E-M10  ^ +^  Full F-Stop  ^  E-M10 F-Stop ^ Note  ^ 
-|   **1.0** |         - | +|   **1.0** |         |  
-|   **1.4** |         - | +|   **1.4** |         |  
-|   **2.0** |         - | +|   **2.0** |         |  
-|   **2.8** |         - | +|   **2.8** |         |  
-|                   - | +|                   |  
-|                 3.5 | +|                 3.5 | Max aperture at 14 mm focal lenght.  
-|   **4.0** |   **4.0** | +|   **4.0** |   **4.0** |  
-|                 4.5 | +|                 4.5 |  
-|                 5.0 | +|                 5.0 |  
-|   **5.7** |   **5.6** | +|   **5.7** |   **5.6** | Max aperture at 42 mm focal lenght.  
-|                 6.3 | +|                 6.3 |  
-|                 7.1 | +|                 7.1 |  
-|   **8.0** |   **8.0** | +|   **8.0** |   **8.0** |  
-|                 9.0 | +|                 9.0 |  
-|                10.0 | +|                10.0 |  
-|  **11.3** |  **11.0** | +|  **11.3** |  **11.0** |  
-|                13.0 | +|                13.0 |  
-|                14.0 | +|                14.0 |  
-|  **16.0** |  **16.0** | +|  **16.0** |  **16.0** |  
-|                18.0 | +|                18.0 |  
-|                20.0 | +|                20.0 |  
-|  **22.6** |  **22.0** |+|  **22.6** |  **22.0** |  |
  
 ===== OLYMPUS Image Share ===== ===== OLYMPUS Image Share =====
doc/appunti/hardware/olympus-e-m10-mark-ii.txt · Last modified: 2020/09/20 09:02 by niccolo