I have the Laowa 4mm f/2.8 Fisheye lens. Used on Olympus OMD-EM5 II. Not any useful results. Certainly nothing like the examples here. This was a few years ago, and I should revisit the lens again.
Groetnis Marius mailto:[email protected] BMedSci (Hons) UP, PGCHE (UP) HCM (FPD) add some chaos to your life and put the world in order On Tue, 4 Feb 2025 at 08:24, Greg 'groggy' Lehey <[email protected]> wrote: > > On Monday, 3 February 2025 at 20:08:38 -1000, David W. Jones wrote: > > On 2/3/25 16:16, Greg 'groggy' Lehey wrote: > >> I have recently got a 7Artisans 4 mm f/2.8 circular fisheye lens with > >> an angle of view of claimed 225°. I'm using it on an Olympus E-PM2, > >> and I'm having no luck at all stitching panoramas. I suspect that > >> there is some issue with Hugin misinterpreting the Exif data, but > >> before I go to even more work, a question: is anybody using a lens of > >> this nature? Are there any tricks? > >> > >> One thing that is interesting: the "focal length" popup sometimes > >> reports a horizontal angle of view of 248° (close enough, since it's > >> way off the end of the image), but at other times 186°, which is > >> clearly wrong. Is there any way to tell the GUI or the underlying > >> scripts what the real angle of view is? > > > > I tried several different ways of generating control points with > > your JPEGs, and was unable to generate any control points connecting > > any images. > > I think that's actually less success than I had. I did get some > control points, but there were other issues before that. In > particular, the second image was always masked in a "fleur-de-lis" > pattern (see first attachment). It didn't make any difference which > image I loaded second, and if I loaded the same image again it was > correct. See the first attached image. > > > I manually added some, but alignment didn't give me anything except > > a jumble of spikes. > > Did you set the lens type to circular fisheye? What angle of view did > the GUI claim? I did get something like a panorama, but it was > useless (second image). > > > Sorry, I have no other ideas. I don't know if everything's being > > affected by the pronounced chromatic distortion around the edges of > > each image, but I know nothing about using fisheye lenses like > > yours! > > Thanks for the try. I was really hoping to find somebody who had been > there before, and maybe somebody will pop up. FWIW I regularly make > panos with an 8 mm full frame fisheye, and I don't have any issues > there. I'm beginning to think that this might be a bug. > > Greg > -- > Sent from my desktop computer. > Finger [email protected] for PGP public key. > See complete headers for address and phone numbers. > This message is digitally signed. If your Microsoft mail program > reports problems, please read http://lemis.com/broken-MUA.php > > -- > A list of frequently asked questions is available at: > http://wiki.panotools.org/Hugin_FAQ > --- > You received this message because you are subscribed to the Google Groups > "hugin and other free panoramic software" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/hugin-ptx/Z6GyqJTTG7KdGeFG%40hydra.lemis.com. -- This message and attachments are subject to a disclaimer. Please refer to http://upnet.up.ac.za/services/it/documentation/docs/004167.pdf <http://upnet.up.ac.za/services/it/documentation/docs/004167.pdf> for full details. -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/hugin-ptx/CAMMfdg63EjC05Hy1XLcqrVSZKhw9udJShfFCt6dwQ-fpQxnyPA%40mail.gmail.com.
