On Sun, May 20, 2012 at 8:33 PM, Philip Webb <purs...@ca.inter.net> wrote: > 120520 Michael Mol wrote: >> as Philip later remarked, it turns out the lens was likely a 75mm prime > > The picture of the camera looks exactly what I remember, > tho' there might have been different models with different lenses. > It was a very good camera for its time.
I'll say! Based on that pic, other things you've said, and the information I found[1], that's an Ikonta 521 B with a Tessar f/3.5 lens, which appears to have been a high-end lens. Meanwhile, all of the lenses for that camera appear to have been 75mm; the big difference appears to be f-stop, which has an impact on depth-of-field/bokeh. And an f/3.5 lens isn't something your modern DSLR's kit lens can usually do. [1] http://camerapedia.wikia.com/wiki/Zeiss_Ikon_Ikonta > >> The leftmost portion will never look all that great, >> as he captured the Sun setting behind a building >> or maybe that's a water spot > > The Sun was indeed setting to the left at that time + date, > but the bluish blemish is some sort of physical decay in the negative, > which was stored in a cardboard box for c 55 yr without being touched. > >> If these source JPG files are scans of paper photos > > No, they're 2 overlapping scans of the same negative, > whose size is 58 x 43 mm = 2,3 x 1,7 inch . Ah. Well, the same holds true; a higher-resolution scan of the source image, stored in an HDR image format (such as 16-bit-per-channel TIFF, 16-bit-per-channel PNG, or OpenEXR) would ultimately give better results. Any of the 16-bit-per-channel formats would increase the available dynamic range (of the format, at least) by a factor of 16, at least. (IIRC, JPEG models luminance in 12 bits, and, for monochrome images, that's at least somewhat advantageous over 8-bit-per-channel grayscale or RGB formats.) > >> Anyway, the final Hugin pto file is here: http://pastebin.com/gudxvAEa > > What is a 'pto' file ? -- I downloaded it & it's text. It's a Hugin project file; you can load that file with Hugin. It assumes the two source JPEG files are in the same directory. > >> And the final stitch is here: >> http://img407.imageshack.us/img407/2030/brum3068brum30702.jpg > > All Firefox gives me is a black window : can you check ? Works on my system. It comes up all-black in geeqie, though; I had to load it in Chrome. Also loads fine in Gimp 2.6. -- :wq
