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
