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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] (current)
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: 2020/06/17 11:54 by niccolo