Archived posting to the Leica Users Group, 2005/06/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have never experienced this color fringing on my MKII. Mike ----- Original Message ----- From: "eric korenman" <leica_korenman@hotmail.com> To: <lug@leica-users.org> Sent: Friday, June 03, 2005 8:57 AM Subject: Re: [Leica] DMR RAW files for download, NOW: Fringing. > 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 -- I am using the free version of SPAMfighter for private users. 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