BTW you are right that it is perfectly OK to call the lens type fisheye when you optimize lens parameters; Hugin will find the best fitting curve anyhow. If you did not optimize or calibrate, then calling it stereographic would be preferable.
On Apr 19, 10:31 am, "Carlos Eduardo G. Carvalho (Cartola)" <[email protected]> wrote: > Hi, > > I also thought Opteka and Samyang were the same or at least very similar, I > have heard that before. As you asked for some samples, I have some here if > you still want to see: > > http://cartola.org/arquivos/Sample-6.5mm.tgz > > I have calibrated the lens not only using the tutorial at hugin site but > also saving the lens after a good stitch, but always have to do similar > optimization that finishes the necessary lens distortions to make the lines > join correctly. That is why I think it doesn't matter very much if I define > the lens initially as fish eye or stereographic. > > Good exchange of information till now. :) > > Tks, > > Carlos E G Carvalho (Cartola)http://cartola.org/360 > > 2012/4/19 Carl von Einem <[email protected]> > > > > > > > > > Thanks for that hint! A second look at <http://michel.thoby.free.fr/** > > SAMYANG/Early%20test%20report.**html<http://michel.thoby.free.fr/SAMYANG/Early%20test%20report.html>> > > shows me that Michel Thoby actually pointed to the fact that both the > > 'Samyang 8mm 1:3.5 FISH-EYE CS' and the 'Opteka 6.5mm 1:3.5 FISH-EYE CS' > > are identical products. > > > Though there is a difference: the Opteka lens (<http://opteka.com/opt65ii. > > **aspx <http://opteka.com/opt65ii.aspx>>) comes with a detachable lens > > hood (sun shield) while the Samyang has a fixed one: > > <http://michel.thoby.free.fr/**SAMYANG/Samyang_shaved.jpg<http://michel.thoby.free.fr/SAMYANG/Samyang_shaved.jpg> > > > <http://i1186.photobucket.com/**albums/z374/dmc1965/newalbum/** > > 65_II_ALT1.jpg<http://i1186.photobucket.com/albums/z374/dmc1965/newalbum/65_II_ALT1.jpg> > > > I really love these marketing heroes... did you know that Mercedes will > > sell the Renault Kangoo soon, just with a big star added? > > > Carl > > > Emad ud din Bhatt schrieb am 19.04.12 14:25: > > >> Thanks all for your support. > > >> I feel Optika and Samyang both are same with different brand names. > >> These lenses are sold with different bran names. > > >> I will try to create equirects this weekend.... > > >> On Thu, Apr 19, 2012 at 12:58 PM, kfj wrote: > > >> I use the Samyang a lot on my 450D. The closest projection type is > >> stereographic, and if you use that, the lens correction coefficients > >> you need are smallest. Here's a values from a typical lens.ini file > >> for it: > > >> [Lens] > >> image_width=4272 > >> image_height=2848 > >> type=10 > >> hfov=138.025 > >> crop=1.6 > >> a=0.00716497 > >> b=-0.0360894 > > >> These settings probably won't be correct for you, as you use a > >> different body, but the lens correction coefficientsshould be similar > >> and the projection type is the same. But you can take it from there. > > >> Also keep in mind that every body and every lens, even within a > >> series, is different. You have to calibrate your own equipment if you > >> want really good results. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Hugin and other free panoramic software" group. > > A list of frequently asked questions is available at: > >http://wiki.panotools.org/**Hugin_FAQ<http://wiki.panotools.org/Hugin_FAQ> > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to hugin-ptx+unsubscribe@** > > googlegroups.com <hugin-ptx%[email protected]> > > For more options, visit this group athttp://groups.google.com/** > > group/hugin-ptx <http://groups.google.com/group/hugin-ptx> -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
