Differences

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--- doc:appunti:hardware:olympus-e-m10-mark-ii [2019/12/10 11:19] – [Acronyms] niccolo
+++ doc:appunti:hardware:olympus-e-m10-mark-ii [2020/06/16 18:54] – [Scene Mode] niccolo
@@ Line 1: / Line 1: @@
 ====== Olympus E-M10 Mark II ======
+The **Olympus E-M10 Mark II**  is a mirrorless camera introduced in september 2015; it features a **4/3 sensor** (17.3 x 13.0 mm) capable of 4608 x 3456 pixels, an **OLED electronic viewfinder** with 2.36 Mpixels and a 3.5 inches touch screen. A feature that distinguishes this camera from other mirrorless ones, is the presence of **two adjustment dials** (in addition to the one which selects the mode and the on/off/flash lever). The dials, like the three Fn buttons, can be **freely assigned** among many functions.
+The camera, in combination with the **M.ZUIKO 12-42 mm pancake lens** (28-84 mm equiv.), is extremely compact and portable.
+{{.:olympus:olympus-e-m10-mark2.jpg?480|The Olympus E-M10 Mark II}}
 ^ Sensor Size           | 17.3 mm (H) x 13.0 mm (V)  |
@@ Line 15: / Line 21: @@
 ===== Anti-Shock and Silent Shutter =====
-The Olympus E-M10 Mark II has two shutter modes called **Anti-Shock** and **Silent**. To fully understand the meaning of these modes, you need to be familiar with some concepts:
+The Olympus E-M10 Mark II has two shutter modes called **Anti-Shock** and **Silent**. The following picture shows the **Anti-Shock/Silent** page of the //Advanced shooting options// menu:
+{{.:olympus:menu-anti-shock-silent.png?300|Configuration Menu for Anti-Shock and Silent Shutter}}
+To fully understand the meaning of these modes, you need to be familiar with some concepts.
 {{ .:olympus:olympus-shutter.jpg?200|Olympus E-M10 shutter. Photo by hmx0979, dpreview.com}}
@@ Line 61: / Line 71: @@
 ===== AEL/AFL and Back Button Focus =====
-===== Acronyms =====
+The **normal behavior** for autofocus and automatic exposure is to **press the shutter button halfway**: the camera performs AF/AE and generally keeps the values locked while you keep the button pressed halfway. Then you can **change framing** and **shoot** by pressing the button completely.
+This behavior can be changed, for example by **separating the AF and AE functions**. Only one of them will be associate to pressing the **shutter button halfway**, the other will be associated to another button, usually a **Fn key**. In general **the Fn button will be used first** (to activate AF or AE), the other //auto// function will be activated by pressing the shutter button halfway, just before completing the shot.
+{{.:olympus:menu-af-mf.png?200|AEL/AFL Modes Menu}}
+{{.:olympus:menu-af-mf-mode1.png?200|S-AF Default Mode for AEL Button}}
+===== Acronyms from the Olympus OM-D Camera Manual =====
 ^ AEL   | **Auto Exposure Locking**: Press the assigned button once to lock the exposure and display **AEL** on the monitor. Press the button again to cancel the lock.  |
-^ AFL   | **Auto Focus Locking**:   |
+^ AF    | **Auto Focus**.  |
+^ AFL   | **Auto Focus Locking**.  |
 ^ BKT   | **Bracketing**: General technique of taking several shots of the same subject using different camera settings.  |
 ^ C-AF  | **Continuous Auto Focus**: The camera repeats focusing while the shutter button remains pressed halfway.  |
+^ EFCS  | **Electronic Front-Curtain Shutter**: also known as //Electronic First Shutter Curtain// (EFSC). It is a feature to eliminate camera shake originating from the shutter mechanism.  |
+^ ESP   | **Electro-selective pattern**: //Digital ESP-metering// measures the brightness of the center of the subject and the surrounding area separately.  |
+^ EV    | **Exposure Value** is a number that represents a combination of a camera's shutter speed and f-number. A difference of 1 EV corresponds to a standard power-of-2 exposure step (one //stop//).  |
 ^ EVF   | **Electronic Viewfinder**: The image captured by the lens is projected electronically onto a miniature display.  |
 ^ HDR   | **High Dynamic Range**: technique used to reproduce a greater dynamic range of luminosity, see [[wp>High-dynamic-range imaging]].  |
+^ HP    | **Home Position** for Auto Focus Area. You can associate the **Home** action to a function key, then set the default AF area using the //Menu// => //Custom menu// => //%%AF/MF%%// => //Set Home//.  |
 ^ LV    | **Live View**: A mode which allows to view the photographic sensor output in almost realtime on the camera's LCD screen.  |
+^ Live Control  | Panel to control shooting options, generally activated by the **OK** and **INFO** buttons. It is a simplified version compared to the //Super Control Panel//.  |
+^ Live Guide  | Generally activated by the **OK** and **INFO** buttons: make it easy to access a variety of advanced photographic techniques.  |
 ^ MF    | **Manual Focus**: Manually focus on any position by operating the focus ring on the lens.  |
 ^ ND    | **Neutral Denisty filter**: stops light reaching the camera sensor, allowing a higher aperture and/or a longer exposure time.  |
 ^ RC mode  | **Remote Control Mode** for external flash units.  |
 ^ S-AF  | **Single Auto Focus**: The camera focuses once when the shutter button is pressed halfway.  |
+^ Scene Menu  | Activated with **OK** and **INFO** buttons, it is a special control panel for **ART** e **SCN** modes.  |
+^ SCP   | **Super Control Panel**: Activated on the monitor or into the viewfinder with the **OK** button, allows you to set the shooting options.  |
 ^ S-OVF  | **Simulate an Optical Viewfinder**: Viewfinder display similar to an optical viewfinder.  |
 ^ WB    | **White Balance**: Is used to adjust colors to match the color of the light source so that white objects appear white.  |
@@ Line 84: / Line 109: @@
 ^ Portrait    | According to manual, it **//produces beautiful skin tones//**.  |
 ^ e-Portrait  | The manual says about this mode that it **//produces smooth skin textures//**.  |
+===== 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 f **22**.
+The Olympus E-M10 have aprture stops at 1/3 of each full stop values:
+|  1,0 |
+|  1,4 |
+|  2,0 |
+|  2,8 |
+|      |
+|      |  3,5
+|  4,0 |  4,0
+|      |  4,5
+|      |  5,0
+|  5,7	5,6
+|  	6,3
+|  	7,1
+|  8,0	8,0
+|  	9,0
+|  	10,0
+|  11,3	11,0
+|  	13,0
+|  	14,0
+|  16,0	16,0
+|  	18,0
+|  	20,0
+|  22,6	22,0
 ===== OLYMPUS Image Share =====
@@ Line 106: / Line 161: @@
   * **dcraw**
-  * **digikam**
   * **rawtherapee**
+  * **darktable**
+  * **digikam**
   * **ufraw**
   * **lightzone** (missing in Debian)
   * **rawstudio** (missing in Debian)
+<code>
+dcraw -i -v PC150102.ORF
+Filename: PC150102.ORF
+Timestamp: Sun Dec 15 11:27:45 2019
+Camera: Olympus E-M10MarkII
+Owner: Niccolo Rigacci
+ISO speed: 200
+Shutter: 1/2000.0 sec
+Aperture: f/3.5
+Focal length: 14.0 mm
+Embedded ICC profile: no
+Number of raw images: 1
+Thumb size:  3200 x 2400
+Full size:   4640 x 3472
+Image size:  4640 x 3472
+Output size: 3472 x 4640
+Raw colors: 3
+Filter pattern: RG/GB
+Daylight multipliers: 2.155587 0.934705 1.481107
+Camera multipliers: 2.015625 1.000000 1.671875 0.000000
+</code>
+===== Comparison with a Compact Camera =====
+^              ^ Canon S120         ^ Olympus E-M10 Mark II  ^
+^ Weight       | 217 g              |  |
+^ Size         | 100 x 59 x 29 mm   |  |
+^ JPEG Images  | 4000 x 3000 24bit  | 4608 x 3456 24bit      |
+^ RAW Images   | 4192 x 3062 36bit  | 4640 x 3472 36bit      |
 ===== Web References =====
   * **[[https://www.wrotniak.net/photo/m43/em1.1-picmode.html|Olympus Picture Modes]]**
   * **[[https://www.wrotniak.net/photo/m43/em1.1-picmode.f.html|i-Enhance, Vivid, Natural and Muted comparison]]**
+  * **[[http://lclevy.free.fr/cr2/|Understanding Canon RAW .CR2 files]]**