Archived posting to the Leica Users Group, 2007/01/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Indulge for now. I'm sure that's part of the learning process. You'll grow out of it. Len On Jan 14, 2007, at 9:57 AM, Eric Korenman wrote: > 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 >> > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information