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.
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)
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)