Archived posting to the Leica Users Group, 2004/02/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks, Henning! A much better explanation than Shutterbug's. Looks like the 10D can be used for some time to come. S. Dimitrov > From: Henning Wulff <henningw@archiphoto.com> > Reply-To: leica-users@mejac.palo-alto.ca.us > Date: Mon, 2 Feb 2004 09:15:22 -0800 > To: leica-users@mejac.palo-alto.ca.us > Subject: Re: [Leica] 32 bit digital cameras > > At 6:50 AM -0800 2/2/04, Slobodan Dimitrov wrote: >> The Shutterbug talk made me think about it. And I'm going from memory here. >> They had a piece on the 4 gig flash card. In it, they say that with current >> cameras it turns into a 2 gig card, as one would need a 32 bit system to >> activate the 4 gig capability. That can only mean one thing, a 32 bit camera >> might be in the pipeline somewhere. >> S. Dimitrov > > In this case 32bit refers to the file allocation system. The 16bit > system used on most cameras (whether they produce 8bit/channel or > higher images) can only address up to 2Gb. The 32bit system, called > FAT32 (for File Allocation Table) can address terabytes, and is > necessary to make use of anything over 2Gb. > > Most digital cameras have sensors that capture more than 8 > bits/channel, but most reduce this to 8 bits to be able to output the > files as JPEGs. That's standard JPEG, as understood by most of the > industry, not JPEG2000, which can handle high bit images, but is > understood by few programs. > > Cameras that can output RAW, or NEF, or DCR output more than 8 > bits/channel. Generally 12 or 14 at this time. Software is then > needed to convert that to a useable 16 bit/channel file that > Photoshop can deal with, or reduce it to 8 bits than any program and > the web can deal with. > > So the Canon D60 and the 10D are both high bit cameras, in that they > can produce RAW files than can be converted into 16bit/channel (48bit > RGB or 64bit CMYK) Photoshop files, but the D60 is not FAT32 > compatible, and thus using 4Gb cards in it is pointless, as it can > only access 2Gb, while the 10D is FAT32 compatible, and can make use > of any card now and in the next number of years. > > -- > * Henning J. Wulff > /|\ Wulff Photography & Design > /###\ mailto:henningw@archiphoto.com > |[ ]| http://www.archiphoto.com > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html