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11-17-2013, 03:18 PM   #1
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Lightroom and K-3 raw files

I use lightroom 4.3 and it seems to be struggling to deal with the 24MP files of the K-3. With the K-30 it was OK, and still is, so nothing seems to have gone wrong with it. Seems that the bigger files are a bit too much for it.

I have upgraded my PC quite recently so I am hoping it is not a hardware limitation. It is an i5 quad core 3.4GHz with 8GB ram and 64 bit Windows 7.


Has anyone here upgraded from LR4 to LR5 after experiencing how LR4 handles K-3 raw files?

I know new releases are often more bloated and slower but I'm just hoping beyond hope that they would have improved the efficiency of the code in LR5. Currently that is my only reason for being interested in the upgrade.

11-17-2013, 03:28 PM   #2
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I was running LR5 before I received the k-3 so no experience with LR4 and k-3 files.

I was expecting to see a significant difference between k-5 and k-3 files so I was watching for it a little apprehensively. But, I can see no difference at all. Even during import I cannot detect any difference. I've noticed no difference in time for processing adjustments either. I was quite surprised actually.

Windows 7 64 bit i7 @3.4ghz and 16gb memory
11-17-2013, 03:34 PM   #3
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I'm running Lightroom 4.3 and have no issues with handling K-3 raw files. This is with DNG but I can't imagine that making a difference?

I don't think you're suffering a hardware limitation.

That said, how bad is the apparent performance you are experiencing? Can't really comment more without knowing what exactly you're observing...

11-17-2013, 03:51 PM   #4
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QuoteOriginally posted by lister6520 Quote
I use lightroom 4.3 and it seems to be struggling to deal with the 24MP files of the K-3.
Maybe take an incremental step and upgrade to LR 4.4?
Although I don't have a K-3, I've used LR4.4 to play with K-3 DNG's without any issues, and my Win7/64 PC is lower specced than yours. Every point upgrade to LR features a variety of bug fixes and optimizations. Maybe you'll see a difference just by using 4.4.

11-17-2013, 05:23 PM   #5
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I can't even get LR 5.2 to open the RAW files. I've been saving them as PEFs. Should I used DNGs?
11-17-2013, 05:33 PM   #6
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QuoteOriginally posted by K David Quote
I can't even get LR 5.2 to open the RAW files. I've been saving them as PEFs. Should I used DNGs?
Yes definitely
11-17-2013, 05:44 PM   #7
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QuoteOriginally posted by K David Quote
I've been saving them as PEFs. Should I used DNGs?
Yes double definitely. IMHO if you are using Adobe software there is no reason to use anything but DNG. If you use other software, that might or might not be different.
11-17-2013, 06:23 PM   #8
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+2 on using DNG for RAW captures.

11-17-2013, 11:51 PM   #9
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QuoteOriginally posted by K David Quote
I've been saving them as PEFs. Should I used DNGs?
DNG has it's advantages.

You can convert any existing K-3 PEF's to DNG's (if need be) using the Adobe DNG Converter, I think.
11-18-2013, 12:12 AM   #10
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LR4.4 is handling my K-3 DNG's just fine. No slower than the files from the K-5. It doesn't create thumbnails before importing though, which is a bit of a pain.
I have never used PEF files, so can't comment.

Last edited by Sandy Hancock; 11-18-2013 at 01:52 AM.
11-18-2013, 12:51 AM   #11
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Sounds good. Thank you, everyone. I'll give DNGs a try on my next outing.
11-18-2013, 04:00 AM   #12
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QuoteOriginally posted by K David Quote
Sounds good. Thank you, everyone. I'll give DNGs a try on my next outing.
I think you should be able to use the silky pix 5 software that came with the K-3 to save the PEF's as DNG's.

For what its worth, Ive spent the last few hours editing a fine art nude shoot from yesterday shot on the K-3 in Lightroom 4.4 (NSFW pics, so no samples here) I had no problems with using the software, but I'll add a caveat that I recently updated my PC with quad core processor, 8mb ram, etc...I think the hardware is the key.
11-18-2013, 05:42 AM   #13
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QuoteOriginally posted by lister6520 Quote
I use lightroom 4.3 and it seems to be struggling to deal with the 24MP files of the K-3. With the K-30 it was OK, and still is, so nothing seems to have gone wrong with it. Seems that the bigger files are a bit too much for it.

I have upgraded my PC quite recently so I am hoping it is not a hardware limitation. It is an i5 quad core 3.4GHz with 8GB ram and 64 bit Windows 7.


Has anyone here upgraded from LR4 to LR5 after experiencing how LR4 handles K-3 raw files?

I know new releases are often more bloated and slower but I'm just hoping beyond hope that they would have improved the efficiency of the code in LR5. Currently that is my only reason for being interested in the upgrade.
I have an Intel i7 3770 with 32G RAM & 256G SSD running Windows 7 64 bit Professional & LR5 still falters when dragging the sliders.

My old PC, an Intel Core 2 Duo with 8 G RAM, ran Lightroom 3 with any hitches but faltered under v4. I much preferred the ability to make +/- adjustments in v4 rather than just + adjustments in V3, so that's the reason I upgraded to a fairly top of the range PC.

By sharp contrast, the RAW interface in Photoshop CS6 is FAST. I don't know what Adobe have done with v4 & v5 but it certainly is not as slick as v3.
11-18-2013, 07:05 AM   #14
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No light Room experience for me but photoshop doesn't have any problems so far at all. I could download Lightroom but I've always been a fan of Photoshop myself.
11-18-2013, 10:51 AM   #15
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I have no K-3, but I have both the LR4.4 and 5.2 (for Mac). :-)
After downloading some sample files from K-3 I developed them first in LR 4.4 then - in LR 5.2.
File been tested, for example:
Digital Cameras, Pentax K-3 Digital Camera Test Image
Concerning the performance of each LR version:
I did not find any noticeable difference between the LR 4.4 and 5.2 while using any developing tool when the file of 35.3Mb was developed.
Also I did not notice the difference in performance while processing the 24.5Mb from K-5 and 35.3Mb file from K-3 in LR 4.4 as well as in LR 5.2.
It is the easy task for the both versions of software. ;-)
(I have the old iMac from early 2006, Mac OS X 10.7.5)
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