Re: [hugin-ptx] Fisheye image set?
21.1.2012 9:55, Thomas Pryds kirjoitti: But from what I can see from your list of hardware, your lens is a circular fisheye. Wouldn't that always result in image files with a circular image area sorrounded by a black area No, the Samyang (a.k.a Opteka/Bower/Vivitar/Walimex) fisheye covers the full APS-C frame. -- Markku Kolkka markku.kol...@iki.fi -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
2012/1/21 Markku Kolkka markku.kol...@iki.fi 21.1.2012 9:55, Thomas Pryds kirjoitti: But from what I can see from your list of hardware, your lens is a circular fisheye. Wouldn't that always result in image files with a circular image area sorrounded by a black area No, the Samyang (a.k.a Opteka/Bower/Vivitar/Walimex) fisheye covers the full APS-C frame. Ah, so with a Canon EOS 500D like mine, which does indeed have the APS-C sensor, there really no choice between circular and full frame no matter the lens... (?) Thomas -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
2012/1/21 Thomas Pryds tho...@pryds.eu 2012/1/21 Markku Kolkka markku.kol...@iki.fi 21.1.2012 9:55, Thomas Pryds kirjoitti: But from what I can see from your list of hardware, your lens is a circular fisheye. Wouldn't that always result in image files with a circular image area sorrounded by a black area No, the Samyang (a.k.a Opteka/Bower/Vivitar/Walimex) fisheye covers the full APS-C frame. Ah, so with a Canon EOS 500D like mine, which does indeed have the APS-C sensor, there really no choice between circular and full frame no matter the lens... (?) I am not completely sure, but think it is the truth. Cheers, Carlos E G Carvalho (Cartola) http://cartola.org/360 -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
21.1.2012 14:41, Thomas Pryds kirjoitti: Ah, so with a Canon EOS 500D like mine, which does indeed have the APS-C sensor, there really no choice between circular and full frame no matter the lens... (?) There are circular fisheyes for APS-C, for example Sigma 4.5mm F2.8 http://www.sigma-photo.co.jp/english/lens/digital/45_28.htm and Sunex 5.6mm F5.6 http://www.superfisheye.com/ -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
Guess those on a full frame sensor would do only a little ball image in the midle :) Carlos E G Carvalho (Cartola) http://cartola.org/360 2012/1/21 Markku Kolkka markku.kol...@iki.fi 21.1.2012 14:41, Thomas Pryds kirjoitti: Ah, so with a Canon EOS 500D like mine, which does indeed have the APS-C sensor, there really no choice between circular and full frame no matter the lens... (?) There are circular fisheyes for APS-C, for example Sigma 4.5mm F2.8 http://www.sigma-photo.co.jp/english/lens/digital/45_28.htm and Sunex 5.6mm F5.6 http://www.superfisheye.com/ -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
2012/1/21 Carlos Eduardo G. Carvalho (Cartola) cartol...@gmail.com Guess those on a full frame sensor would do only a little ball image in the midle :) Something like http://goo.gl/XF2xB :-) Thomas -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
Hi, I have put online some samples taken with a T2i (not full frame) using an Opteka 6.5mm: http://cartola.org/arquivos/Samples_T2i_Opteka6.5.zip In the file I put also a hugin projet used to stitch them. There are 12 images. I usually take more images than necessary to cover the whole sphere in order to have redundancy, mainly when there is people. You can see in the pto file that the last was not used at the end. I did some adjustments in GIMP in the final panorama and you can see the final image I did here: http://cartola.org/360/en/2012/01/04/workshop-at-iv-gnugraf/ At the end of the post I put some technical information (most of the times people don't see that) listing all software and hardware I have used. I really don't know if someone would notice the difference of a panorama made with a true fisheye or that lens you put on top of a non fisheye. I guess you probably can have some black borders with that, like you would have with a true fisheye in a fullframe camera. I had them when I used one in a point and shoot. You can think about your money, purpose and opinion. Do you have the money for a true fisheye? Will you miss this money? Are you professional or amateur? Cheers, Carlos E G Carvalho (Cartola) http://cartola.org/360 2012/1/19 Thomas Pryds tho...@pryds.eu Hi Does anyone here know of somewhere to obtain a (free) set of fisheye images in a reasonable resolution for stitching into a panorama? It would be great to try experimenting a bit with Hugin and some fisheye images before actually going out to buy a fisheye lens for my camera. I have been searching Google for such a set, but unfortunately without luck. On a side note: What would you recommend? A true fisheye lens to put directly onto the camera body, or one of these (less expensive) lenses to put on top of an ordinary lens? Thanks, Thomas -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
Re: [hugin-ptx] Fisheye image set?
2012/1/20 Carlos Eduardo G. Carvalho (Cartola) cartol...@gmail.com I have put online some samples taken with a T2i (not full frame) using an Opteka 6.5mm: http://cartola.org/arquivos/Samples_T2i_Opteka6.5.zip Thank you a lot! The only real problem I encountered when trying to do a panorama from scratch from your image set was figuring out the focal length and multiplicator, but I always have troubles with this, with image files that lack this info. Anyway, when I copied the values from your pto file, everything went smooth. I really don't know if someone would notice the difference of a panorama made with a true fisheye or that lens you put on top of a non fisheye. I guess you probably can have some black borders with that, like you would have with a true fisheye in a fullframe camera. I had them when I used one in a point and shoot. But from what I can see from your list of hardware, your lens is a circular fisheye. Wouldn't that always result in image files with a circular image area sorrounded by a black area (because all of the projected light is covered by the camera's sensor)? Or does that depend on the camera, also? Or perhaps you cropped the images? You can think about your money, purpose and opinion. Do you have the money for a true fisheye? Will you miss this money? Are you professional or amateur? Definitely amateur. Only doing this for the fun of it :-) So I do have to think of the money, indeed, but if I'm not mistaken it should be possible to get a used lens in a very nice condition at a fairly acceptable price. The main reason I thought of getting a fisheye is that it will enable me to cover the same area with fewer images. Doing the (few) panos I did with my 18-55 mm zoom lens I had to shoot a lot of images in order to cover everything, and then still it is easy to miss a small spot here and there. Also, stitching so many images (e.g. 42 for one of them, at 18 mm) means a lot of CPs and other things to keep track of. So one of the things I learned by this process of stitching others' image sets, was that a circular fisheye covers the widest angle, while a fullframe covers slightly less (obviously). Coverage at the expense of image resolution, of course. Thomas -- 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
