# Real FoV rotated by 90 degrees

**URL:** https://forum.telescopius.com/t/real-fov-rotated-by-90-degrees/875
**Category:** General Questions
**Tags:** telescope-simulator
**Created:** [September 10, 2023, 2:29pm UTC](https://forum.telescopius.com/t/real-fov-rotated-by-90-degrees/875 "2023-09-10T14:29:49Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![BerndD](https://forum.telescopius.com/user_avatar/forum.telescopius.com/berndd/32/514_2.png) [@BerndD](https://forum.telescopius.com/u/BerndD)
#### Post date: [September 10, 2023, 2:29pm UTC](https://forum.telescopius.com/t/real-fov-rotated-by-90-degrees/875/1 "2023-09-10T14:29:49Z")

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Hi there,  
I’m pretty new to astrophotography, but have been using Telescopius and Stellarium for a while. When I target an object based on my camera and telescope data, the FoV in Telescopius and Stellarium are consistent. However, when I point my camera/telescope to that target using an aequatorial mount, the fov is rotated by 90 degrees.  
Can anyone explain?  
Thanks!

-Bernd

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### Author: ![sebagr](https://forum.telescopius.com/user_avatar/forum.telescopius.com/sebagr/32/6_2.png) [@sebagr](https://forum.telescopius.com/u/sebagr)
#### Post date: [September 11, 2023, 1:27pm UTC](https://forum.telescopius.com/t/real-fov-rotated-by-90-degrees/875/2 "2023-09-11T13:27:00Z")

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Hi Bernd,

Have you tried plate solving your pictures to see the position angle / orientation of your framing?

Maybe your camera is actually rotated 90 degrees and not with the long side towards the celestial pole?

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### Author: ![BerndD](https://forum.telescopius.com/user_avatar/forum.telescopius.com/berndd/32/514_2.png) [@BerndD](https://forum.telescopius.com/u/BerndD)
#### Post date: [September 12, 2023, 10:55am UTC](https://forum.telescopius.com/t/real-fov-rotated-by-90-degrees/875/3 "2023-09-12T10:55:47Z")

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Thanks for this hint.  
I haven’t plate solved (how?) but when the mount is at zero position (pointing to the pole) the camera’s long side is in east-west direction (landscape format). So, if I understand correctly this would be 90° rotated?

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### Author: ![sebagr](https://forum.telescopius.com/user_avatar/forum.telescopius.com/sebagr/32/6_2.png) [@sebagr](https://forum.telescopius.com/u/sebagr)
#### Post date: [September 12, 2023, 12:01pm UTC](https://forum.telescopius.com/t/real-fov-rotated-by-90-degrees/875/4 "2023-09-12T12:01:04Z")

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You can plate solve any picture by uploading it to Telescopius to your profile - menu Astrophotography \> Upload your astrophotography

After you upload your picture it usually takes a few minutes to plate solve using [Astrometry.net](http://Astrometry.net) serivce.

If the long side is indeed in the East-West direction (I assume you know this by visual inspection?), that should be a rotation / position angle of 0 degrees (or maybe 180, but not 90).
