Archived posting to the Leica Users Group, 2005/06/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Eric, Unfortunately I have no experience with the high-end Canons, only the 20D and 300D(digital Rebel), but even the bottom of the range 300D doesn't have anything like it. I reckon there must be some parameters that you can set on the DMR which were possibly set wrongly for this test, I can't imagine that Leica would release anything with a standard like this. If I oversharpen and over contrast the Canon 20D parameter settings I might just get a little fringing but that would be pushing the settings to their upper limit and even then the results are not that drastic. It is however interesting to note that the church shot is a qquite long exposure, maybe the fringes are something connected to this. Douglas eric korenman wrote: > But what about the color fringing? > Isn't it awfully prominent at high contrast borders? > Do the D2x and MKII exihibit this degree of fringing? > > Eric > > >> From: Douglas Sharp <douglas.sharp@gmx.de> >> Reply-To: Leica Users Group <lug@leica-users.org> >> To: Leica Users Group <lug@leica-users.org> >> Subject: Re: [Leica] DMR RAW files for download, NOW: Fringing. >> Date: Fri, 03 Jun 2005 13:19:58 +0200 >> >> Hello Mikiro, >> try auto colour correction on the dragonfly picture and see if it >> shifts to blue, it did when I ran it in PS Elements 3.0. >> >> I agree about the quality, I think it resembles more the shots from >> the Olympus P&S digicamera my wife uses more than what I'm used to >> getting from a Canon 20D or 300D. Are the images losing something >> during transfer from the linked site? >> >> I've just compared a few parameters between 20D and DMR files >> >> DNG file size 19.4MB converts to TIFF 28.7 MB >> CR2 file size 8.4MB converts to TIFF 23.4 MB >> >> Unless my way of thinking is terribly wrong I make that a compression >> factor of 1.48 for DNG and 2.8 for CR2, so you would be getting a lot >> more CR2 files on your storage card. >> The relative sizes are, at 240 dpi >> DMR 3876x2584 Canon 20D 3504x2336 pixels >> DMR 41.02x27.35cm Canon 20D 37.08x24.72cm print size at 240dpi >> >> Both files do have an aspect ratio of 1,5 (2:3 format) so nothing has >> been cropped here. The Leica file is in effect 1.2 times larger than >> the Canon file, so somebody is being not quite accurate with the >> factors 1,37 and 1,6 quoted for the crop factors, this should work out >> as 1.16 >> >> So in non-mathematical language the full resolution print size >> advantage you get with a Leica DMR file is 20%, sounds quite >> reasonable until you see that the print is then only 3.9cm longer >> (1.55 inches) and 2.6cm higher (1.03inches) at the same resolution of >> 240dpi. >> >> Probably all a waste of time , but somebody may find the figures >> interesting. >> Cheers >> Douglas >> >> >> MIKIRO wrote: >> >>> Douglas, >>> >>> I played with the image files on Photoshop. To my eye they look as if >>> they had been taken with a smaller digicam, which may suggest the >>> limited dynamic range you feel and/or possible problems of the lenses >>> used. I do not see a massive shift to the blue channel but a tone >>> similar to those I saw with Panasonic/Leica digicams. >>> >>> Cheers, >>> >>> MIKIRO >>> Japan >>> >>> Douglas Sharp wrote: >>> >>>> I downloaded the church and the dragonfly <nd ran them through PS >>>> with acouple of simple standard processes, levels. contrast, auto >>>> colour correction. Also through a couple of plug-ins like ColorCastFX. >>>> The reaction of the dragonfly shot to processing is disturbing, I >>>> get the impression that there is a very limited dynamic range on >>>> these files, and a tendency to a massive shift to the blue channel. >>>> Can anyone else confirm this so that I can be sure that it's not me >>>> making mistakes. >>>> Douglas >>>> >>>> B. D. Colen wrote: >>>> >>>>> And a 100 iso image at that. >>>>> >>>>> >>>>> On 6/2/05 7:20 PM, "eric" <leica_korenman@hotmail.com> wrote: >>>>> >>>>> >>>>>> Interesting - the color fringing problem is pretty darn severe on >>>>>> some >>>>>> images. >>>>>> Look at "Kapuzinerkirche Salzburg" and look at the light fixture >>>>>> on the >>>>>> upper left. >>>>>> Very prominent color fringing is evident. >>>>>> >>>>>> Eric >>>>>> >>>>>>> >>>>>>> ----- Original Message ----- >>>>>>> From: "Douglas Herr" <telyt@earthlink.net> >>>>>>> To: <lug@leica-users.org>; <leica@freelists.org>; >>>>>>> <leicareflex@freelists.org> >>>>>>> Sent: Thursday, June 02, 2005 6:06 PM >>>>>>> Subject: [Leica] DMR RAW files for download >>>>>>> >>>>>>> >>>>>>> >>>>>>>> Several sample RAW files in DNG format are available on Peter >>>>>>>> Werner's >>>>>>>> website (not dial-up friendly): >>>>>>>> >>>>>>>> http://www.leicaphoto.net/Download/DMR_Raw/index.html >>>>>>>> >>>>>>>> >>>>>>>> Doug Herr >>>>>>>> Birdman of Sacramento >>>>>>>> http://www.wildlightphoto.com >>> >>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >