Differences

This shows you the differences between two versions of the page.

--- doc:appunti:hardware:canon_s120 [2019/03/22 09:19] – [Manual Focus] niccolo
+++ doc:appunti:hardware:canon_s120 [2020/10/31 07:16] – [Web References] niccolo
@@ Line 84: / Line 84: @@
   * If the **Safety MF** option is **On** (see the [MENU], camera tab):
     * Move the **focusing frame** (orange rectangle) tapping the touch screen.
-    * Press **halfway the shutter button** to **refine the focus**. Warning! The instruction manual talks about //fine-tune//, but it is not clear how much can be this fine tuning. Some users reported that a manual set of one meter, was corrected by fine-tune to infinite, beacuse no objects to be focused were in that range.
+    * Press **halfway the shutter button** to **refine the focus**. Warning! The instruction manual talks about //fine-tune//, but it is not clear how much can be this fine tuning. Some users reported that a manual set of one meter, was corrected by fine-tune to infinite, beacuse no objects to be focused were in the one meter range.
 ===== Safety Shift =====
+**Safety Shift** is an option that interferes with manual settings in **Tv** and **Av** modes.
+Pressing the **shutter button halfway** will show the aperture value or the shutter speed **selected automatically to obtain a standard exposure**, if such exposure cannot be obtained, the value is displayed in **orange color**. But if **Safety Shift** is enabled, the manually selected value (aperture or speed) will be corrected and displayed on the screen. To enable this option, press the **%%[MENU]%%** button and search the **%%[Safety Shift]%%** into the //camera tab//.
+===== Neutral Density Filter =====
+In photography, a **neutral-density filter** is a filter that **reduces the intensity of all colors of light** equally. The purpose of a neutral-density filter is to **reduce the amount of light** entering the lens, **allowing combinations** of aperture and exposure time that would otherwise produce overexposed pictures.
+For example you can use it to allow an **high aperture value** and get a **lower depth of field**.
+====== Python Script Download ======
+Here it is a Python script to decode Exif metadata from photos taken by the Canon PowerShow S120: **{{.:canon_s120:canon-metadata.txt|canon-metadata}}**.
+====== Web References ======
+  * **[[https://www.exiv2.org/tags-canon.html|Exiv2 - Canon MakerNote Tags]]**
+  * **[[https://www.dpreview.com/forums/post/35260903|Wow.... focus distance reported in EXIF???]]**
+  * **[[https://photo.stackexchange.com/questions/105977/what-is-focus-distance-lower-upper-and-how-is-it-different-from-depth-of-field|What is “focus distance lower/upper” and how is it different from depth of field?]]**
+  * **[[https://www.dpreview.com/forums/post/51962463|Distance in EXIF]]**