Archived posting to the Leica Users Group, 2014/07/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]When I got my D40x Nikon in 7/22/2007 22 July, 2007 my Adobe Bridge would not open them but there was a converter free on the internet. A few months later I upgraded my Bridge and Photoshop and it worked without them. now when I look they don't make the converter any more. But maybe you're right and I have it switched around... On 7/3/14 2:04 AM, "Geoff Hopkinson" <hopsternew at gmail.com> wrote: > Mark you don't have that right. Nothing 'half assed' about it. > A DNG file is a true raw format file. The structure of the file is like a > TIFF but with instructions. That is to say the RGB information is the same > but the developing instructions are not actually applied, just recorded. So > you can go back and change those instructions with no loss of info (the > same as with other raw formats). > > You can choose to convert NEF (or other raw formats) to DNG if you want > but you can't go the other way. At least I never heard of that. > > > > > Cheers > Geoff > http://www.pbase.com/hoppyman > > > On 3 July 2014 15:18, Mark Rabiner <mark at rabinergroup.com> wrote: > >> Though a "DNG is both a raw image format and a format that supports >> "non-raw", or partly processed, images" >> Nothing Raw about a Tiff. >> A DNG can be converted to say a NEF which is the digital Nikon raw format. >> A thing I needed to do when I first got my D40X. >> They converted to full RAW. Not some half assed thing. >> >> >> On 7/2/14 5:16 PM, "Geoff Hopkinson" <hopsternew at gmail.com> wrote: >> >>> Howard a DNG is essentially a TIFF with some more instructions. >>> >>> >>> Cheers >>> Geoff >>> http://www.pbase.com/hoppyman >>> >>> >>> On 3 July 2014 06:41, Howard Ritter <hlritter at bex.net> wrote: >>> >>>> This file-size difference is intrinsic to TIFF, which interpolates a >> value >>>> for all 3 colors, R-G-B, for each pixel. >>>> >>>> The X-Pro 1 has a 24-Mpx sensor, 8 million for each of R, G, and B (this >>>> is simplified), each of which generates 1 byte of luminance >> information. So >>>> its raw (adjective, not acronym!) file size is 1 byte x 8 Mpx x 3 >> colors--to >>>> a first approximation, 24 MB. If JPEGed for storage, it is re-expanded >> when >>>> viewed. When the image is viewed or printed, software gives each R >>>> photosite also a G and a B value by interpolation from adjacent G and B >>>> photosites, and likewise for native G and B photosites. So the full >> image >>>> you see in Photoshop should have a file size of ~72MB. TIFF is simply >> this >>>> full file, with interpolated colors at each pixel. That's why it's >> always >>>> generally about 3 x the size of the stripped-down raw file. Differences >>>> seen in practice may result from compression, which can save significant >>>> storage capacity without loss of information (unlike JPEG). There may be >>>> some housekeeping stuff that brings your TIFF file to 4 x your raw; >> perhaps >>>> the file also incorporates a separate raw image. >>>> >>>> I don't know how this relates to DNG, though. >>>> >>>> --howard >>>> >>>> >>>> On Jul 2, 2014, at 1:58 PM, Ken Carney <kcarney1 at cox.net> wrote: >>>> >>>>> I hadn't really looked either. My X raw files are about 24-27 MB (not >>>> sure what causes the size differential), opening to 94MB Tiff's. My >> Canon >>>> 5D MkII files are roughly the same raw size, but open to 120+ MB Tiff's. >>>>> >>>>> Ken >>>> >>>> _______________________________________________ >>>> 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 >> >> >> >> >> -- >> Mark William Rabiner >> Photographer >> http://gallery.leica-users.org/v/lugalrabs/ >> >> >> >> _______________________________________________ >> 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 -- Mark William Rabiner Photographer http://gallery.leica-users.org/v/lugalrabs/