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[UX Issue] Why Does The Camera FOV Follow The Horizon Coordinate System, Not Equatorial (Answer: Choose "Equatorial" As The Mount Type, Then The FOV Indicator Will Rotate As The Scope Moves To Different Parts Of The Sky)

Gshaughnessy

May 27, 2019 19:05

Answered

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I'm finding the field of view indicators follow the horizon coordinate system and not the equatorial system. This is a problem for framing my images since I have to manually rotate the fov indicators to get back to the equatorial system's frame. This changes, however, when I move to a different part of the sky. I think prior versions had the fov indicators match the equatorial frame. Here's a link to a video showing the issue when I pan around zenith.

https://www.dropbox.com/s/q6pbgrswk2t5t9z/SSP_fov_bug.mov?dl=0

Gabe

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5 comments

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  Theresamarie11 June 10, 2019 13:11

  I've brought this up several times, at several different times, with developers and for some reason they don't seem to get it..  Suspect we're not dealing with observers because it's such an obvious thing to me.     

   

   

  Terri

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  Bill Tschumy June 10, 2019 18:11

  Gabe,

  I don't understand what the issue is.  If you have your mount type specified to be an "equatorial" mount, then the FOV indicator rotates as the scope moves to different parts of the sky (or if you are showing it when not connected to a scope, as you pan the chart).  That is what I see happening in your movie.  I'm not sure what you are trying to indicate what you change the Field Rotation Angle.  It applies an additional amount of rotation to the FOV.

  I really don't understand your comment "I have to manually rotate the fov indicators to get back to the equatorial system's frame".  It should already be in the equatorial frame.  That is why it rotates automatically as you move around.  If you turn on "Cardinal Directions" you will see it rotates so the "top" of the FOV indicator always points North.

  If you really think there is a problem, you will need to explain it more.

  Terri,  I have been an active amateur astronomer for around 40 years.  I am definitely an observer.

   

   

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  Theresamarie11 June 10, 2019 23:35

  Hi Bill, thanks for the note.   I've brought this perceived issue up a couple of times including atar NEAF 2019, although at NEAF it just received blank stares.    I had never seen the mount definition, and no one has pointed it out to me before (that I ever recall).   Why wouldn't you put the mount definition with the telescope equipment... in any case, now that I know it's there I tried it (default is alt az) and changed it to equatorial.   Works like a champ, the frame moves as it should equatorially.    Thanks for pointing this out.

   

  
  Terri

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  Gshaughnessy June 11, 2019 04:33

  I can confirm that the issue I was having was the mount definition.  Now that it's defined correctly, it's working as expected.  I agree though with Terri, I don't think that it's all that intuitive.  

   

  Gabe

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  Bill Tschumy June 12, 2019 17:03

  There are two entries in the Telescope Setup screen: Scope Type and Mount Type.  You need to set them both for things to work properly.  It has been this way for 10 years.  For some mount types (like a push-to scopes) there are additional fields in the Mount Type screen that need to be filled out (like encoder resolution).

  Anyway, glad we got it straightened out.