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Compression-Decompression Issue

220 Views 2 Replies Latest reply: Nov 6, 2012 10:53 AM by Keith Barkley RSS
mylesfromlos angeles Calculating status...
Currently Being Moderated
Nov 6, 2012 6:08 AM

I have a Nikon D800 and shoot RAW images. I use Aperture 3.2.4 for photo processing. The camera settings are as follows:

 

1.) Raw recording set at lossless compressed

2.) Bit depth set at 14 bit

3.) Image size set at FX (36x24) L (8390x4912 pixels).

 

The file size of the resulting images averages 45 MB. Prints larger than 24x16 inches begin to blur. My goal is to achieve prints in the 36x48" range or larger.

 

Questions:

 

Does shooting raw images "lossless compressed" limit print size?

If so, how does one use Aperture 3.2.4 to decompress the files?

Thank you.

  • Ernie Stamper Level 8 Level 8 (37,455 points)
    Currently Being Moderated
    Nov 6, 2012 6:32 AM (in response to mylesfromlos angeles)

    The lossless compression is not the issue.  Note on page 87 of the Users Manual for the D800 (love mine) that the print size at 300 dpi is 24.5 x 16.4.  So with larger prints than that, the resolution must drop below 300 dpi, which depending upon the detail of the scene photographed may be responsible for your "bluring".  Btw, on that page the FX (36 x 24) is reported as 7360 x 4912 -- where did you arrive at the 8390 number?  But the number of pixels is fixed by the camera's sensor.

     

    The latest versions of Photoshop can use vector scaling to upsize photo files for large scale printing.  I have not tested how (or whether) Aperture might perform at scaling an image to add pixels.

     

    Ernie

  • Keith Barkley Level 5 Level 5 (5,140 points)
    Currently Being Moderated
    Nov 6, 2012 10:53 AM (in response to mylesfromlos angeles)

    How are you printing? If you are not using Aperture, the image you export might not be full size.

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