RAW processing of Pentax K5 DNG Files

On my recent trip to Bali, I decided to shoot all the RAW files using the DNG setting on the Pentax K5. I figured this would maximize compatibility and also allow me to view the files on Picasa on my netbook that I used as a back up drive while travelling.

When I got home and downloaded the photos onto my MacBookPro, I was dismayed to see that a lot of the night shots had a magenta cast. I opened the files in Photoshop CS3 and looked at them and they rendered correctly. However, iPhoto and Aperture had the magenta problem.

A quick Google search indicated that the RAW converter for Apple had this problem but that it was fixed in the latest update to Snow Leopard (10.6.7). Problem was I was still running Leopard (10.5.8) and there didn’t seem to be a fix for this in Leopard.

I bought Snow Leopard and installed it – took about an hour. Got all the latest software updates, and then opened iPhoto. After reprocessing a few of the RAW files that had this problem (ISO 400 and ISO 800 files), the files rendered correctly.

The following shows are two JPEGs, the first a straight convert from the previously processed RAW file, and the second, a JPEG after reprocessing the RAW file.


About petergsimmons

Global citizenship is conferred on those who have lived in a variety of countries, and who don’t identify with any one culture. I am such a person. Having lived in Jamaica, Canada and Japan, I have been exposed to First World/Third World, East and West, North and South. This has lead to a rich living experience, open-mindedness and curiosity about the world around me. This variety of living conditions in human landscapes is coupled with equally diverse travels in natural landscapes from the jungles of South East Asia and South America to the Arctic tundra; tropical beaches to the Himalayas, resulting in an incredible journey through life itself.
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