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#11
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"Paul Rubin" wrote in message ... Bruce Lewis writes: Just to clarify -- this means some kind of lossless compression is being done on the RAW files, right? Six megapixels at 24 bits each should be 18 megabytes of uncompressed data. There are usually just 10 or 12 bits at each pixel. In a RAW file there's not a separate R, G, and B value at each pixel. Each pixel is exactly one of R, G, or B, not all three. My *ist D (same sensor as DS) produces a 14.5MB 12 BIT RAW file. The * ist DS produces a 11.4 MB RAW, Pentax applies a different algorithm so the RAW files are a tad smaller. |
#12
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"Darrell" writes:
My *ist D (same sensor as DS) produces a 14.5MB 12 BIT RAW file. The * ist DS produces a 11.4 MB RAW, Pentax applies a different algorithm so the RAW files are a tad smaller. My guess is the D is storing a jpeg file along with the RAW, and it's storing 16 bits per pixel even though it's a 12 bit sensor. |
#13
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"Paul Rubin" wrote in message ... "Darrell" writes: My *ist D (same sensor as DS) produces a 14.5MB 12 BIT RAW file. The * ist DS produces a 11.4 MB RAW, Pentax applies a different algorithm so the RAW files are a tad smaller. My guess is the D is storing a jpeg file along with the RAW, and it's storing 16 bits per pixel even though it's a 12 bit sensor. AFAIK the Pentax * istD doesn't store a jpeg with the RAW. I am not sure why it has the biggest 12 bit RAW in it's class.I can store 70 RAW images on my 1 GB CF card, with the *ist DS it will store 90 on a 1 GB SD card. |
#14
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In article , "Darrell"
wrote: My *ist D (same sensor as DS) produces a 14.5MB 12 BIT RAW file. The * ist DS produces a 11.4 MB RAW, Pentax applies a different algorithm so the RAW files are a tad smaller. With my Canon 20D, the largest RAW file is 9.1mb on my 80gb drive. FWIW. JR |
#15
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In article , "Darrell"
wrote: My *ist D (same sensor as DS) produces a 14.5MB 12 BIT RAW file. The * ist DS produces a 11.4 MB RAW, Pentax applies a different algorithm so the RAW files are a tad smaller. With my Canon 20D, the largest RAW file is 9.1mb on my 80gb drive. FWIW. JR |
#16
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"Darrell" wrote:
AFAIK the Pentax * istD doesn't store a jpeg with the RAW. Apparently the istD RAW does include an embedded JPEG within it. This can be used by viewers to display the image without having to decode the RAW file in its entirety. I recently bought one of those Phototainer storage devices which makes use of this feature to display istD RAWs. TH |
#17
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"Darrell" wrote:
AFAIK the Pentax * istD doesn't store a jpeg with the RAW. Apparently the istD RAW does include an embedded JPEG within it. This can be used by viewers to display the image without having to decode the RAW file in its entirety. I recently bought one of those Phototainer storage devices which makes use of this feature to display istD RAWs. TH |
#18
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On Sat, 01 Jan 2005 12:43:17 GMT, Tony H wrote:
"Darrell" wrote: AFAIK the Pentax * istD doesn't store a jpeg with the RAW. Apparently the istD RAW does include an embedded JPEG within it. This can be used by viewers to display the image without having to decode the RAW file in its entirety. I recently bought one of those Phototainer storage devices which makes use of this feature to display istD RAWs. Correct - but it stores more than one - full resolution, VGA, and thumnail. -- John Bean I do not fear computers. I fear the lack of them (Isaac Asimov) |
#19
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On Sat, 01 Jan 2005 12:43:17 GMT, Tony H wrote:
"Darrell" wrote: AFAIK the Pentax * istD doesn't store a jpeg with the RAW. Apparently the istD RAW does include an embedded JPEG within it. This can be used by viewers to display the image without having to decode the RAW file in its entirety. I recently bought one of those Phototainer storage devices which makes use of this feature to display istD RAWs. Correct - but it stores more than one - full resolution, VGA, and thumnail. -- John Bean I do not fear computers. I fear the lack of them (Isaac Asimov) |
#20
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"Tony H" wrote in message
... "Darrell" wrote: AFAIK the Pentax * istD doesn't store a jpeg with the RAW. Apparently the istD RAW does include an embedded JPEG within it. This can be used by viewers to display the image without having to decode the RAW file in its entirety. I recently bought one of those Phototainer storage devices which makes use of this feature to display istD RAWs. TH I haven't read that in the manual or elsewhere. I had to download a free plug-in from Cerious so Thumbsplus could display RAW files. I will have to try it with the Epson 2000P when we get some in. |
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