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Autopano not able to stitch, hugin no issue?

PostPosted: Mon Mar 19, 2018 11:32 pm
by bastibasti
Hi,

I shot a test pano in my living room:
- Canon 77D
- Samyang 8mm F3.5 Fisheye
- Landscape orientation
- 6 horizontal +1 nadir +1 zentith
- bracketed mode
- fisheye and 8mm focal length entered in the image properties.

However I have issues to stitch the images. Please check the screenshot.

I am a total noob. However I had no issues stitching the images made with my Yi4k Action cam + panohero.

Any hints what I did wrong?

Re: Autopano not able to stitch, hugin no issue?

PostPosted: Tue Mar 20, 2018 10:01 am
by olivierbo
Hello,

If you get a messy panorama, the first thing to do is to check the focal which is 12.8mm in that case.
Let me know if it helps.

Best,
Olivier

Re: Autopano not able to stitch, hugin no issue?

PostPosted: Tue Mar 20, 2018 11:02 am
by bastibasti
Hi,

I will try it. Can you PLMK how to find out that information?

Re: Autopano not able to stitch, hugin no issue?

PostPosted: Tue Mar 20, 2018 11:08 am
by olivierbo

Re: Autopano not able to stitch, hugin no issue?

PostPosted: Tue Mar 20, 2018 8:31 pm
by bastibasti
Thanks. Yes. No my question was: for the samyang 8mm, how do you know the focal length is 12.8mm? BTW entering 12.8mm seems to work - however I need to understand where did you get that number from (I'm a noob - next time I dont want to have to ask)

Re: Autopano not able to stitch, hugin no issue?  [SOLVED]

PostPosted: Wed Mar 21, 2018 8:28 am
by olivierbo
Hello,

As you use a Canon APS-C sensor, you must multiply 8 by 1.6 (24x36 equivalent conversion ratio): https://en.wikipedia.org/wiki/APS-C
If your camera is detected in image properties (Camera sensor scale field), just change the Focal lenght field and Autopano will automatically calculate the Focal (35mm equiv) ;)

Hope this helps.

Best regards,
Olivier

Re: Autopano not able to stitch, hugin no issue?

PostPosted: Thu Mar 22, 2018 1:42 pm
by bastibasti
Thank you for that answer!