Thanks Steve, I just found a short thread in the archives but it didn't
seem to reach a definite conclusion.
Seems that TIFF makes no provision for storing partial bytes of data
in less than full bytes of storage space.
The only downside to this is waste of storage space and increased
read/write times.
Kinda like being in the old FAT days again. ;-)

Don


> -----Original Message-----
> From: Steve Jolly [mailto:[EMAIL PROTECTED]
> Sent: Thursday, October 21, 2004 6:02 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Yet Another Discussion of Bayer Sensor Resolutions (was Re:
> MZ-S discontinued?)
> 
> 
> Don Sanderson wrote:
> > If an istD is 6MP at 12bits per pixel this would be about 9MB 
> of raw sensor
> > data.
> > The .PEF files are a little over 12MB in size.
> > What information is contained in the additional ~3MB?
> > Or is the file simply "padded" to 2 bytes per pixel?
> 
> The file *is* simply padded to two bytes per pixel. :-)  Plus IIRC it 
> contains a low-resolution JPEG version of the image for preview purposes.
> 
> S
> 

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