Archived posting to the Leica Users Group, 2001/11/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks for the response. When I did my last panorama... http://members.aol.com/zeissleica/private/Silver.JPG ...it was with the Noct. The Noct images had very little perspective distortion and were quite easy to stitch with a low end stitching program, considering they were pretty large. When I began trying to stitch the images from the 21mm, I was dismayed by how far off the overlap was. I don't yet whether I will actually be able to create a pano with the shots, as I don't think I shot enough overlaps to compensate for the distortion. Any stitching program recommendations out there? /Mitch Zeissler - -----Original Message----- From: Henning Wulff [mailto:henningw@archiphoto.com] Sent: Wednesday, November 14, 2001 12:13 PM To: leica-users@mejac.palo-alto.ca.us Subject: Re: [Leica] Panorama question Regarding 2): The 21 CV has very little distortion; in fact, it has somewhat less than the current 21 ASPH from Leica. This is using the term 'distortion' to refer to the usual criteria of constant image magnification, meaning that the lens images straight lines in the subject as straight lines on film. You're not going to get any significant improvement by going to any other lens. 'Perspective distortion', or the distortion seen in the corners of very wide angle images due to the very lack of geometric, linear distortion mentioned above, is unavoidable if some form of geometric distortion isn't accepted. Fisheye lenses have less distortion in some ways, and rotating lens cameras create images with a certain amount of geometric distortion which reduce other types of distortion. If you want very wide, you have to make compromises. With regard to stitching, use only the middle of very wide angle lenses. If you want your final image to subtend a very large angle vertically, use your 21 vertically (portrait) and overlap your images so that you only need to use about 1/3 or less of each frame. Then your 'distortion' problems will start to go away. The thinner the slice, the less the 'distortion'. With respect to your program; if Adobe Elements is like Photoshop, 512Mb is not that much for handling 90Mb image files. What with the undo files, and intermediate states the amount of data being shuffled can be a lot more. - -- * Henning J. Wulff /|\ Wulff Photography & Design /###\ mailto:henningw@archiphoto.com |[ ]| http://www.archiphoto.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html