Fix docs building

Author: Erol444

docs/source/samples/calibration/calibration_reader.rst

@@ -29,6 +29,9 @@ Here's theoretical calculation of the focal length in pixels:
 
   focalLength = width_px * 0.5 / tan(hfov * 0.5 * pi / 180)
 
+To get the HFOV you can use `this script <https://gist.github.com/Erol444/4aff71f4576637624d56dce4a60ad62e>`__, which also works for wide-FOV cameras and allows you to
+specif alpha parameter.
+
 With 400P (640x400) camera resolution where HFOV=71.9 degrees:
 
 .. math::
@@ -37,8 +40,12 @@ With 400P (640x400) camera resolution where HFOV=71.9 degrees:
 
 And for 800P (1280x800) camera resolution where HFOV=71.9 degrees:
 
+.. math::
+
   focalLength = 1280 * 0.5 / tan(71.9 * 0.5 * PI / 180) = 882.5
 
+
+
 Setup
 #####
 

docs/source/tutorials/configuring-stereo-depth.rst

@@ -36,8 +36,6 @@ Let's first look at how the depth is calculated:
 
    depth [mm] = focalLength [pix] * baseline [mm] / disparity [pix]
 
-.. dropdown::
-
 Examples for calculating the depth value, using the OAK-D (7.5cm baseline OV9282), for 400P resolution and disparity of 50 pixels:
 
 .. math::