set up hugin for sigma 8mm fish eye

[Maria Prontera]

I'm new with Hugin. I'm trying to learn the software and create panoramas 

Camera: Nikon D5100

Lens: Sigma fish eye 8mm

Panoramic head: Nodal Ninja R10

Exposure: +/- 2EV - 

Total number of images: 12 (4 point of view horizontally aligned x 3 hdr exposure)

Here attached the result. Images are not aligned properly as you can see. Where I'm wrong?

I tried with different type of lens: normal, fish eye circular, fish eye equirectangular... which is the right one?

Please is there an online tutorial that explain how to create a 360panos with 8mm sigma fish eye?

Thank you

[Greg 'groggy' Lehey]

On Monday, 26 December 2016 at 4:27:23 -0800, Maria Prontera wrote:
> I'm new with Hugin. I'm trying to learn the software and create panoramas
>
> Camera: Nikon D5100
> Lens: Sigma fish eye 8mm
> Panoramic head: Nodal Ninja R10
> Exposure: +/- 2EV -
> Total number of images: 12 (4 point of view horizontally aligned x 3 hdr
> exposure)
>
> Here attached the result. Images are not aligned properly as you can see.
> Where I'm wrong?

It's hard to tell from the results. Where are the original files and
the .pto file? FWIW, I take many panoramas with an 8 mm fisheye, and
they align and stitch very well, so it's quite possible.

> I tried with different type of lens: normal, fish eye circular, fish
> eye equirectangular... which is the right one?

One of the fisheyes. I haven't seen a difference, but the question is
whether your lens covers the complete sensor, or whether the corners
are empty.

> Please is there an online tutorial that explain how to create a 360panos
> with 8mm sigma fish eye?

I think I've seen one, but I'd have to search. Let's see your images
first.

Greg
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[panostar]

Maria, Since you are new to PTGui, I think you should first try to get a good stitch using only the 4 normally exposed set of images.  Move on to HDR after that.  Your lens type should be 8mm circular fisheye, as the edges of the image circle will be visible in the corners of the image frame.  Check and adjust the crop circle so that it is aligned just inside the image circle. 

Your poorly aligned sample panorama is probably due to some badly placed control points, some perhaps on similar features in two images that are not actually the same features.  This often happens when you have repeating architectural features around the room.  There might be control points on similar features in images that don't even overlap! 

Check the positioning of points with high distance values in the Control Points table: double clicking a line in the table will display the corresponding images in the Control Points window. Delete/adjust points as necessary. The distance value is a measure (in pixels) of the misalignment of the marked features, so you are ideally wanting to see values no higher than 3 or 4, say.  If all else fails, assign control points manually between images 0-1, 1-2, 2-3 and 3-0.  Run the Optimizer after any changes and it will report the average and maximum control point distances, which will be a good indication of how well the images are aligned - at least in the areas where control points are placed.

John

[panostar]

Maria, I should have remembered to mention another cause of bizarre alignment issues, viz. control points automatically generated on sundry parts of the tripod/panohead at the bottom of the images. Be sure to delete any points there.  More generally, in outdoor panoramas avoid points on anything moving like clouds, vehicles, people, foliage etc.

John