Lightroom will not read Nikon D800 NEF files. I have updated lightroom twice, first to 4.1 and second to 4.2 and in neither case would the files import. I have read several forum entries that say these files are compatible with Lightroom and/or to update Lightroom. Anyone have an answer? This is getting really aggravating!
Did you have Nikon's Capture NX software installed? Did you view the files there before you attempted to go to Lightroom?
I remember a bug from the 4.1 RC days where there was a problem with an older version of Capture NX that caused this. Uninstalling the old version of Viewer NX seems to be key. This thread might help: http://nikonrumors.com/forum/topic.php?id=5700
Gentlemen: Thanks for your responses. I have some news for you. I just tried downloading the files from the camera not using either Nikon Transfer or View. I downloaded from the camera via USB (no card reader on my laptop) using the Windows photo download process. I opened these files directly into Lightroom and they displayed! I still didn't get any previews but there was no msg. that previews were not available, just empty gray boxes. This may be because I didn't wait long enough for them to be generated. I noticed that it took quite awhile for the imported images to be displayed. The D800 FX files are a lot larger than my D300 DX files. Any way, the problem appears to be with one of the Nikon programs. I guess I'll try the Nikon tech support next. At least I can retrieve my NEF files. Maybe this will help other folks who may have the same problem.
Nikon Transfer is obsolete and should not be used. The Transfer option of an up-to-date ViewNX2 should be ok. I would hesitate to use something that tries to be very consumer friendly like Windows Photo Transfer in case it is extracting JPG previews from the NEFs instead of actually transferring the NEF files, unchanged, but if you can determine they are really raw files, not just JPGs or JPGs renamed to NEF, then it’s probably ok—the NEFs will be much larger than the JPGs so that’s a way to tell. I think you should test with a few photos, waiting long enough to make sure you do actually get previews rendered in LR’s Import area.
Personally I just use Windows Explorer and copy the files from my card in a card-reader to my local hard-drive then do an LR Add Import from there. I use a codec-pack that allows Windows Explorer to let me see the JPG-previews that are embedded into the raw files so I am not copying blind.
I use the Fast Picture Viewer Codec Pack that costs $15 for a single computer license. It got it a few years ago because while Canon provided a codec for their CR2 files for Windows 7 and Vista it was only a 32-bit codec and I used 64-bit Windows. I believe Canon has since released a 64-bit codec for their RAW files, but the FPV codec pack also shows thumbnails and previews for PSDs and TIFs and other files, and so I’d rather just have one Codec that works for Canon and Nikon and PS files instead of having to find one for each type of file and not having some covered.
You do not need the Fast Picture Viewer, just the Codec Pack:
North America
Europe, Middle East and Africa
Asia Pacific