[sorins]

Hi all,
I encounter a very strange behavior of LR with one of my DNG photos, taken with a K1 camera.
In fact, you may download the file from here: https://we.tl/jHKZuq1CDC, and here is what's happening in my LR 5.2 (this is what I have now available, v.6 is on another computer, only available in few days: there is a visible silhouette which, immediately after imported in LR is... disappearing from the photo! A friend of mine confirms the same thing in ACR.
The photo was taken in HDR mode and (probably this is the trick), I went in front of the camera only for the third (last) exposure. It might this be the answer? If so, why? LR is reading each individual exposure and "sees" 2 of them without silhouette?
Thanks for any idea you might have!

[stevebrot]

The photo was taken in HDR mode and (probably this is the trick), I went in front of the camera only for the third (last) exposure. It might this be the answer? If so, why? LR is reading each individual exposure and "sees" 2 of them without silhouette?

LR does not support Pentax HDR. The initial preview is from the embedded JPEG and is replaced by a LR generated version (probably based on the first of the stacked DNG in the HDR sequence). Your shadow image is probably on the embedded JPEG, but not on the DNG used for the working preview.


Steve

[sorins]

Hey Steve, thanks for quick reply and you're most probably right, as in Camera Calibration section the only choice for camera profile is "embedded"!
Thanks a lot, I had no idea about this possibility!

[stevebrot]

as in Camera Calibration section the only choice for camera profile is "embedded"!

That is not related. LR 5.2 does not provide camera-specific profile support (.dcp file) for your K-1 and uses the embedded dcp profile in the DNG instead. The embedded JPEG is something different and a common function of almost all RAW files. As for Pentax HDR support, Adobe does not provide that for any Pentax camera in any version of LR. The fail-over behavior is to simply extract the first image in the stack and ignore the others.


Steve

[Paul the Sunman]

If you use DCU that came with your K-1 you can separate the three components of the HDR (Tools > Separation of HDR RAW file ...). Then you'll see clearly what's happening.

[sorins]

That is not related. LR 5.2 does not provide camera-specific profile support (.dcp file) for your K-1 and uses the embedded dcp profile in the DNG instead. The embedded JPEG is something different and a common function of almost all RAW files. As for Pentax HDR support, Adobe does not provide that for any Pentax camera in any version of LR. The fail-over behavior is to simply extract the first image in the stack and ignore the others.


Steve

Understood now, thanks Steve!

---------- Post added 12-19-16 at 06:36 AM ----------

If you use DCU that came with your K-1 you can separate the three components of the HDR (Tools > Separation of HDR RAW file ...). Then you'll see clearly what's happening.

Thanks Paul! The truth is I never used DCU, for some reasons, some of them being the interface, the capacity of processing images etc. But...it's never too late! Thanks again!

[Paul the Sunman]

Thanks Paul! The truth is I never used DCU, for some reasons, some of them being the interface, the capacity of processing images etc. But...it's never too late! Thanks again!

You can just use DCU to separate them. Then you can import into LR and build an HDR from them. A bit clunk, but it works.

[stevebrot]

You can just use DCU to separate them. Then you can import into LR and build an HDR from them. A bit clunk, but it works.

One can also use dcraw to extract embedded DNG. Being a command line program, it is also a bit of a clunk, but still a fast and reasonable option. Alternatively, a bracketed sequence for original exposure is equivalent. BTW, the OP's LR 5.2 does not have native HDR support.


Steve

[emalvick]

Yes... I think short of the DCRAW option, I think DCU is the only option for processing or separating HDR DNG files from a Pentax camera. I remember looking into it a bit back when I got my camera and at that point felt that just shooting the bracketed series was good enough. I'd much rather have the 3 (or I shoot 5) raw files... 90% of the time I don't even need all of them or an HDR to begin with. Images always have better DR than the histogram during shooting leads me to believe.