Archived posting to the Leica Users Group, 2007/01/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]much thanks to all who replied. I am luckily now testing out my very own M8. So far I am very impressed. I highly recommend putting a half case on - preferablly Luigi's with the snap open back panel. Makes you focus on shooting rather than chimping and fiddling with buttons. Eric On 1/14/07, G Hopkinson <hoppyman@bigpond.net.au> wrote: > Eric, I managed to locate the rather gargantuan thread on this subject in > the Leica User Forum. My brain hurts. If you are feeling > especially robust, here it is. > http://www.leica-camera-user.com/digital-forum/7498-m8-why-10mb-vs-dmr-20mb.html > The executive summary, as near as I can figure is that the difference > between the DMR & M8 file size is due to the use of lossless > compression with the M8. The issue of how the final M8 file is arrived at > is rather more painful. > The empirical result from the couple of original DNGs that I have is that > the file saves as a 16 bit TIFF of about 59MB. When the > tonal range is manipulated in Photoshop it shows none of the posterisation > and gapped histogram that I would expect when performing > the same operation on an 8 bit file, such as a JPG. > I want one. > Cheers > Hoppy > > > -----Original Message----- > From: G Hopkinson [mailto:hoppyman@bigpond.net.au] > Sent: Thursday, 11 January 2007 10:45 > To: 'Leica Users Group' > Subject: RE: [Leica] M8 Article in LFI > > Thanks Eric, I have no experience at all with the DMR, except admiring > magnificent output from Doug Herr, for example. My > understanding is that both sensors are capturing at 14 bit. It's what's > happening afterwards that I am most interested in. 14 bit to > a 16 bit DNG must involve processing too. The sample M8 DNG that I have > here saves as a 59MB 16 bit TIFF. > Do you think that the file size difference could be due to more efficient > lossless compression with the M8? I have an idea that this > subject has been attacked within the Leica User Forum. I must do some > searching. > > Cheers > Hoppy > > -----Original Message----- > From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org > [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On Behalf Of > Eric Korenman > Sent: Thursday, 11 January 2007 10:06 > To: Leica Users Group > Subject: Re: [Leica] M8 Article in LFI > > The DMR chip captures 14 bit directly into 16 bit DNG files. > Thats why DMR RAW filres are 20mb > And the 8 bit DNGs from the M8 are 10mb > > I think the upper end Canon's chips capture 12bits of data. > I am sure a Canon user will chime in here. > > Eric > > > On 1/10/07, G Hopkinson <hoppyman@bigpond.net.au> wrote: > > > > Guys this is an area of great interest to me. I do wish that I had that > > LFI article. AFAIK no digital camera sensor captures at a > > higher bit rate than that. There's a lot that I don't understand > > regarding > > that processing within the camera. However empirically, > > when you manipulate the M8 RAW files tonal range within Photoshop they > > ARE > > emphatically superior to any 8 bit file and certainly as > > robust as any 16 bit scan from 35mm (which is my own experience). > > So I join Eric in hoping that a LUG member of scientific bent can give us > > an insight into the in-camera processing. > > > > Cheers > > Hoppy > > > > -----Original Message----- > > From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org [mailto: > > lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On Behalf Of > > Didier Ludwig > > Sent: Wednesday, 10 January 2007 22:21 > > To: Leica Users Group > > Subject: Re: [Leica] M8 Article in LFI > > > > > > >So.. Isn't the weakest link in the imaging processing chain an 8 bit > > format? > > > > yes if you exclude 6-bit and 4-bit format > > > > >LFI then goes on to say essentially "you won't see the difference > > >anyway" > > > > This translates in "the main thing is there's a red dot on" > > ;-) > > Didier > > > > > > > > _______________________________________________ > > 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 > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >