# Strange rotation angle in telescope simulator
**URL:** https://forum.telescopius.com/t/strange-rotation-angle-in-telescope-simulator/646
**Category:** General Questions
**Created:** [November 22, 2022, 9:28pm UTC](https://forum.telescopius.com/t/strange-rotation-angle-in-telescope-simulator/646 "2022-11-22T21:28:00Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@BrendanC](https://forum.telescopius.com/u/BrendanC)
#### Post date: [November 22, 2022, 9:28pm UTC](https://forum.telescopius.com/t/strange-rotation-angle-in-telescope-simulator/646/1 "2022-11-22T21:28:00Z")
Hi,
I’ve used the scope simulator a lot in the past, for putting together mosaics. It’s always worked fine.
Tonight I was using it for a two-pane mosaic of M45. The rotation said 104.4 degrees. However, when I looked at the preview from my camera, it was quite a way out from what I expected. I noticed the FOV angle said East, so on a hunch, wondered if this translated to 75.6 degrees. On rotating my camera to that angle, it was as per the Telescopius preview.
So, I don’t understand why the scope simulator gave me a different angle from that which actually worked. I’ve looked and can’t find a way to make the simulator give a FOV angle West, in case that would change things.
Any ideas?
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### Author:  [@sebagr](https://forum.telescopius.com/u/sebagr)
#### Post date: [April 14, 2023, 5:54pm UTC](https://forum.telescopius.com/t/strange-rotation-angle-in-telescope-simulator/646/2 "2023-04-14T17:54:36Z")
Hi @BrendanC, sorry for the late reply! Given the amount of questions I get regarding the PA, I’ve just posted [this topic](https://forum.telescopius.com/t/position-angle-rotation-angle-is-it-backwards/757) to try and clarify any confusion. I hope you find it useful 🙂