Need to export 204" x 96" @ 300dpi

[ronn33414268]

I am trying to export a tiff file to 204" x 96" at 300dpi.  Lightroom exports but the size only goes to about 96 inches.  Is there a limitation in LR?

[JoeKostoss]

Wow, that is a very high resolution for such a large image!  Please post a screenshot of your export dialog where you select these dimensions?  What is the size in pixels of the original image you are trying to export.  If your original is a different aspect ratio than what you want to end up with, it may not work as you expect.

[ronn33414268]

Client request for the file, I know it will not be printed at that res, but they want it anyway.  Working from an 35mb raw file, aspect ratio is the same.

[johnrellis · Accepted solution]

Also, the exported image would be too big for TIFFs, which have a maximum file size of 4 gigabytes:

8-bit: 61,200 pixels * 28,800 pixels * 3 bytes/pixel = 5.3 GB

16-bit: 61,200 pixels * 28,800 pixels * 6 bytes/pixel = 10.6 GB

You'd have to edit the image in Photoshop, resize it to the required pixel dimensions, and then save it as a PSB.

[johnrellis]

I am trying to export a tiff file to 204" x 96" at 300dpi.  Lightroom exports but the size only goes to about 96 inches.  Is there a limitation in LR?

The exported TIFF would be 61,200 pixels x 28,800 pixels:

204 in * 300 pixels/in = 61,200 pixels

96 in * 300 pixels/in = 28,800 pixels

The image would have a total of 1680 megapixels:

61,200 pixels * 28,800 pixels / (1024 * 1024) = 1680 megapixels

Unfortunately, LR only supports images up to 512 megapixels (import and export).

But as JoeKostoss suggests, do you really want such a huge image at 300 dpi?