How to view DNG thumbnails in Windows

If you convert RAW files to DNG as a part of your workflow in Lightroom like I do, you probably get frustrated with the fact that Windows does not display DNG image thumbnails or let you view files in Windows Photo Viewer. Windows by default does now know how to read DNG files and the only operating system today that has some support from Adobe, is Windows Vista. Adobe officially released a 32-bit DNG codec for Windows Vista, but it does not work with the 64-bit version of Windows Vista, Windows XP or Windows 7, making it pretty worthless. Gladly, there are a couple of workarounds to get all Windows operating systems to display DNG thumbnails and open them in Windows Photo Viewer and I will show you how to do that in this quick article.

DNG support in Windows XP

Interestingly, Windows XP (32-bit) comes with full DNG support, but it needs to be activated from the Windows registry. If you are running Windows XP, here is what you need to do:

  1. Download this registry file and save it on your desktop
  2. Double-click the file, which will ask you to confirm if you want to add entries to your registry. Click “Yes”, which then will modify the registry as needed.
  3. Reboot the computer.
  4. Go to a folder with DNG files and switch to thumbnail view. Verify that you can see the thumbnails, as you can see with JPEG files.
  5. Delete the downloaded registry file from your desktop.

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RAW vs JPEG

What is RAW format in digital photography? What are the advantages and disadvantages of RAW versus JPEG and why? Should you shoot in RAW or JPEG? Will shooting in RAW complicate your post-production and workflow? These are some of the most common questions that people ask after they buy their first DSLR camera and go through the camera options. Having a thorough understanding of advantages and disadvantages is essential for photographers to make the right decision on whether to use RAW format for their work.

RAW Sand Dunes

Sand Dunes - Shot in RAW

I remember my first time going through the camera options and reading the Nikon D80 manual, wondering about what RAW does and why I should consider using it. JPEG is a no-brainer – it’s the default image format that is used in most point and shoot cameras and we all got used to it and know it very well, seeing and sharing JPEG images online and downloading/uploading them from and to our mobile devices. But there was something about RAW that I wanted to find out about immediately. Maybe it was the word “raw” that sounded intriguing, maybe it was the immediate desire to get the sharpest, highest quality and best pictures ever without knowing much about the camera…whatever it was, I went ahead and changed my camera settings to RAW and tried to take a picture. The first thing I noticed, was how small all of a sudden my memory card became. Wait a second! How come the number of pictures went down from over 700 to under 200? The image looked exactly the same on the LCD and yet it consumed more than three times more memory? Bummer. Then, I took the memory card and inserted it into my laptop. To my surprise, I couldn’t even open the darn thing! Worthless, I thought and changed my camera settings back to JPEG.

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DNG vs RAW

Should you use DNG or RAW format? This is one of the most important questions that you as a photographer need to ask yourself, because it will definitely affect your digital photography workflow. Every photographer has their own say on whether to use DNG or RAW, but it is important to know the key differences between the two, along with their advantages and disadvantages. In this article, I will provide as much information as I can about both formats, in addition to my opinion and workflow. If you are looking for more information about how RAW images compare to JPEG images, then please read my “RAW vs JPEG” article.

1) What is RAW?

RAW images, also known as “digital negatives” are truly “raw”, meaning they are almost unprocessed data coming directly from the camera sensor. Unlike JPEG files that can be easily opened, viewed and printed by most image-viewing/editing programs, RAW is a proprietary format that is tied to the camera manufacturer and sensor, and therefore is not supported by all software products. RAW files preserve the most amount of information about an image and generally contain more colors and dynamic range than other formats.

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Nikon RAW (NEF) Codec for 64 bit Vista or Windows 7

If you are running a 64 bit version of Windows Vista or Windows 7, you cannot use Nikon’s NEF codec, because it is only compatible with 32 bit operating systems. It is unfortunate that Nikon has not yet released a 64 bit version yet and it seems like it will stay that way – Nikon basically said that they do not have any plans to develop a 64 bit version of the NEF codec.

UPDATE: On 7/26/2011, Microsoft released a new Codec Pack for Windows 7 that incorporates many Nikon DSLRs. The latest codec pack can be downloaded from here. The newest DSLRs like Nikon D5100 and D7000 are not yet supported, but Microsoft should be releasing updates to the codec pack in the future.

For those who do not know what a “RAW codec” is, when you import a RAW image from your camera into your machine, if your PC has no support for that RAW file, it will not display the image thumbnail. In addition, none of the Windows image applications and viewers will be able to open the RAW files. Not that the latter is critically important, especially for those who always process RAW images in Adobe Photoshop or Lightroom, but it is still helpful to be able to see the image thumbnails of files when opening RAW images for editing directly in Windows or when browsing through the archived RAW files.

So, with no support from Nikon for NEF files in 64 bit operating systems, the only other option is to use third party codecs. As of today, there are multiple types of third party codecs, but I will only write about the one that works very well and is 100% free (as of 06/17/2010, the product is no longer free, as explained here. The codec pack is now $9.99. If you want to get the older version that is still free, either Google for “Fastpictureviewer codec 1.70″ or download the file from CNET – not sure how long CNET will keep the file).

FastPictureViewer WIC RAW Codec Pack

The FastPictureViewer RAW codec pack is a product from fastpictureviewer.com, which includes support for both 32 and 64 bit versions of Windows Vista and Windows 7 and covers over 20 RAW image formats and about 300 camera models (all current Nikon cameras, including D3s are supported). I installed it on my 64 bit Windows 7 Ultimate and the installation went smoothly without any problems (requires reboot after install).

FastPictureViewer Installer

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