Differences

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--- en:ost:fokus_new [2025/10/09 07:45] – rhainich
+++ en:ost:fokus_new [2025/10/09 08:37] (current) – [Using NINA] rhainich
@@ Line 132: / Line 132: @@
 Under ''Options>Autofocus'' the settings to finetune the autofocus can be found. An image can be seen below the documentation of these settings:
-  * **Use filter offsets** Lets you apply predefined offsets per filter instead of refocusing every time. (Currently not available, test observation needed). Default: OFF
+  * **Use filter offsets** lets you apply predefined offsets per filter instead of refocusing every time. (Currently not available, test observation needed). Default: OFF
-  * **Autofocus initial offset steps** How far the focuser moves out initially to start the autofocus. Default: 10
+  * **Autofocus initial offset steps** determines how far the focuser moves out initially to start the autofocus. Default: 10
-  * **Autofocus method** Self explanatory. Default: Star HFR (Half-Flux Radius of stars)
+  * **Autofocus method**: Self explanatory. Default: Star HFR (Half-Flux Radius of stars)
-  * **Curve fitting strategy** Function to fit your measurement. Default: Hyperbolic
+  * **Curve fitting strategy**: Function to fit your measured data points. Default: Hyperbolic
-  * **Number of attempts** How many times NINA retries autofocus if the first attempt fails. Default: 1
+  * **Number of attempts**: How many times NINA retries autofocus if the first attempt fails. Default: 1
-  * **Use brightest n stars** If >0, only the n brightest stars instead of all detected stars (Good for poor star fields/Noisy images). Default: 0
+  * **Use brightest n stars**: If >0, only the n brightest stars instead of all detected stars (Good for poor star fields/Noisy images). Default: 0
-  * **Outer crop ratio** 1 crop overscan region, -1 include overscan region. Default: 1
+  * **Outer crop ratio**: If 1 the overscan region is cropped. If -1 the overscan region will be included. Default: 1
-  * **Binning** Pixel binning during autofocus. Default: 2×2
+  * **Binning**: Pixel binning during autofocus. Default: 2×2
-  * **R² threshold** Minimum quality fit for the autofocus curve before retrying. Default: 0.8
+  * **R² threshold**: Minimum quality fit for the autofocus curve before retrying. Default: 0.8
-  * **Autofocus step size** How far the focuser moves between samples. Default: 150
+  * **Autofocus step size** determines how far the focuser moves between samples. Default: 150
-  * **Default autofocus exposure time** Exposure duration (in seconds) per autofocus frame. Default: 6s, but for clear, needs to be adapted for other filters.
+  * **Default autofocus exposure time**: Exposure duration (in seconds) per autofocus frame. Default: 6s. Needs to be adapted for other filters.
-  * **Disable guiding during AF** Turns off guiding while autofocus runs. Default: off
+  * **Disable guiding during AF**: Turns off guiding while autofocus runs. Default: off
-  * **Focuser settle time** Delay after a focuser move to allow mechanical settling. Default: 1
+  * **Focuser settle time**: Delay after a focuser move to allow mechanical settling. Default: 1
-  * **Number of exposures per point** How many frames are taken at each step, then averaged. Default: 1
+  * **Number of exposures per point**: How many frames are taken at each step, then averaged. Default: 1
-  * **Inner crop ratio** Crops the center region of the frame when detecting stars. Default: 0.5 = 50%, can be selected within [0.2,1]
+  * **Inner crop ratio**: Ratio of the frame that is used for detecting stars. Default: 0.5 = 50%. Can be selected within [0.2,1]
-  * **Backlash compensation method** Overshoot or Disable, to cancel gear play. Default: Not available/Overshoot
+  * **Backlash compensation method**: Method used to cancel gear play. Available are ''Overshoot'' and ''Disable''. Default: Not available/Overshoot.
-  * **Backlash IN/OUT** Step count used to clear backlash when moving in or out. Default: 20,0
+  * **Backlash IN/OUT**: Step count used to clear backlash when moving in or out. Default: 20,0
@@ Line 162: / Line 162: @@
 </WRAP>
-In the Exposure Tab of the Camera Control window (see below), select Focus in the Exposure Preset drop-down menu. In this preset many settings, important for focusing, are already pre-selected. In the examples shown below the exposure time (''Seconds'') is set to one second, this must be adjusted according to the object used for focusing.
+In the //Exposure Tab// of the //Camera Control// window (see below), select ''Focus'' in the //Exposure Preset// drop-down menu (see below). In this preset many settings, important for focusing, are already pre-selected. In the examples shown below the exposure time (''Seconds'') is set to one second, this must be adjusted according to the object used for focusing.
 {{ ost:software:maximdl:focus_maximdl_1.png |}}
-After a click on ''Start'' images are continuously taken and displayed. Now the telescope can be focused by means of //CW3// or the hand terminal of the EFA. To find the coarse focus, it is recommended to first approach a bright star and to focus in such a way that the diffraction ring disappears. Rough values for the focus with the different instruments and eyepieces can be found in the table above.
+After a click on ''Start'' images are continuously taken and displayed. Now the telescope can be focused by means of //PWI4// or the hand terminal of the EFA. To find the coarse focus, it is recommended to first approach a bright star and to focus in such a way that the diffraction ring disappears. Rough values for the focus with the different instruments and eyepieces can be found in the table above.
 In order to further optimize the focus, a globular cluster can be observed. The low angular distance between the stars in a globular cluster facilitates very good focusing results, since the Airy discs of the individual stars can only be separated with a very well focused telescope. An optimally focused telescope operates with a seeing limited resolution, which for our site is often larger than 2“. This is significantly worse than the diffraction limited resolution of our telescope, which is 0.23″. The [[https://de.wikipedia.org/wiki/Rayleigh-Kriterium|Rayleigh criterion]] describes the theoretical limit at which two Airy discs can be recognized as separated light sources.