Archived posting to the Leica Users Group, 2005/06/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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