Archived posting to the Leica Users Group, 2005/06/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi, Douglas. You are right. The auto WB in Camera RAW for PS Elements 3.0 sets the colour temperature at < 4000K. I do not know whether it is a compatibility problem between the current Camera RAW and the DNG for DMR. I have not yet managed to obtain decent image quality from the DNG files by changing parameters of Camera RAW. Cheers, MIKIRO Douglas Sharp wrote: > 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 > > >