Panasonic G3 lens not corrected

[marbly]

I recently bought a Panasonic G3 + 14-42mm + 45-200mm kit to play around with. From my reading I have learned that Panasonic stores a lens profile in the lens firmware and it gets written to the raw file so that you don't need an external profile for the lenses. If you open the raw file in various raw processing programs the distortion is automatically corrected even though there is no external profile in the same sense as other lenses for other systems. I opened a raw file using Photoshop Elements 9/ACR 6.5 and the distortion is automatically corrected. I opened the same file in Lightroom 4.1 RC and it is automatically corrected. I opened the same file in ASP 1.0.1.10 and the distortion is not corrected. What am I doing wrong with ASP?

[afx]

As far as I know Adobe is the only company that got the info from Panasonic on the encoding of the distortion parameters...

On the other hand, it is rather trivial to calibrate a lens:
http://forum.corel.com/EN/viewtopic.php?f=90&t=45815

cheers
afx

[marbly]

Thank you for the reply. I will take a look at that link.

[marbly]

I did a bit of additional checking and I see that the G3 and 14-42mm lens are in the ASP db of lenses, but then when you select them it says the lens is uncalibrated. This is exactly the same problem that I reported to Corel that existed in 1.0.0.39 and I also started a thread here about it:

http://forum.corel.com/EN/viewtopic.php?f=90&t=45194

It is very, very deceiving to have an impressive list of lenses in the db and then discover that many, many of them are not calibrated. Can someone explain what the rationale is for including a bunch of lenses that have no profile?

I was expecting that Corel would have fixed this in the new version released recently. Remove lenses that are there for no reason or provide profiles for them.

[afx]

I did a bit of additional checking and I see that the G3 and 14-42mm lens are in the ASP db of lenses,

Nope, they are not.
There is a difference between recognized lenses and lenses that have correction data in the lens DB.

It is very, very deceiving to have an impressive list of lenses in the db and then discover that many, many of them are not calibrated. Can someone explain what the rationale is for including a bunch of lenses that have no profile?

You are mistaking a list of identified lenses with a correction database.

cheers
afx

[Denis de Gannes]

I am attaching a file processed by LR 4.1rc and ASP 1.1.10 from a Panasonic raw file Panasonic G 14-42mm lens with G3. It is my understanding that LR is in fact adjusting for the required Lens Correction necessary to proper render the m4/3 cameras and lenses. I am not seeing any difference in the files distortion wise, so I can only believe that ASP is making the same corrections.

[marbly]

I did a bit of additional checking and I see that the G3 and 14-42mm lens are in the ASP db of lenses,

Nope, they are not.
There is a difference between recognized lenses and lenses that have correction data in the lens DB.

I could provide a screenshot, but I we all know that isn't necessary. ASP shows them in the dropdown lens db list, but then reports that they are not calibrated if you select them.

It is very, very deceiving to have an impressive list of lenses in the db and then discover that many, many of them are not calibrated. Can someone explain what the rationale is for including a bunch of lenses that have no profile?

You are mistaking a list of identified lenses with a correction database.

Again, you seem to be pretending here.

[marbly]

I am attaching a file processed by LR 4.1rc and ASP 1.1.10 from a Panasonic raw file Panasonic G 14-42mm lens with G3. It is my understanding that LR is in fact adjusting for the required Lens Correction necessary to proper render the m4/3 cameras and lenses. I am not seeing any difference in the files distortion wise, so I can only believe that ASP is making the same corrections.

Maybe it depends on which focal length used (I think one of my photos where it is very obvious was taken at 14mm). I suspect that 14mm is the worst. I could provide photos, but it seems superfluous since it is so glaringly obvious. Even so, I will try to find a bit of time today to do so.

[Denis de Gannes]

I am sure ASP and LR are doing some initial correction on import based on the info for lens correction within the raw file.

Processing raw files, from m4/3 cameras and lenses, without the correction is a waste of time due to the design of the lenses, it is a basic requirement. This allows Panasonic and Olympus to reduce the size of the lens.

I am sure there is a case for additional correction using the lens correction features but the initial correction is needed to make to files usable.

I have just made another post with a file at 18mm as apposed to the previous file which is shot at 42mm. Clearly ASP is not making the required correction on import.

[afx]

I could provide a screenshot, but I we all know that isn't necessary. ASP shows them in the dropdown lens db list, but then reports that they are not calibrated if you select them.

Yes, that is the list of known lens, not the calibration DB.
just because you do not want to accept that does not change it....
That list is taken straight from the lens table files.

Just because you do not like it, does not change reality.

cheers
afx

[afx]

I am sure there is a case for additional correction using the lens correction features but the initial correction is needed to make to files usable.

AS has only one correction mechanism. And it is only usable if there is correction data in the lens files.
Unfortunately not all of the m4/3 lenses are covered.
See supportfiles/Profiles/LensProfiles/profile_micro43.txt

cheers
afx

[Denis de Gannes]

I am sure there is a case for additional correction using the lens correction features but the initial correction is needed to make to files usable.

AS has only one correction mechanism. And it is only usable if there is correction data in the lens files.
Unfortunately not all of the m4/3 lenses are covered.
See supportfiles/Profiles/LensProfiles/profile_micro43.txt

cheers
afx

Ok my previous file was at the long end i.e 42mm. I have done another test at 18mm and compared the LR and ASP rendition with the camera jpeg. Clearly LR is making corrections to match the camera jpeg and ASP is not. Clearly an untenable situation.

[greerd]

I recently bought a Panasonic G3 + 14-42mm + 45-200mm kit to play around with. From my reading I have learned that Panasonic stores a lens profile in the lens firmware and it gets written to the raw file so that you don't need an external profile for the lenses. If you open the raw file in various raw processing programs the distortion is automatically corrected even though there is no external profile in the same sense as other lenses for other systems. I opened a raw file using Photoshop Elements 9/ACR 6.5 and the distortion is automatically corrected. I opened the same file in Lightroom 4.1 RC and it is automatically corrected. I opened the same file in ASP 1.0.1.10 and the distortion is not corrected. What am I doing wrong with ASP?

The 14-42 lens isn't corrected but the 45-200 is. In order to apply the correction the 'Enable correction' in the Detail tab must be checked.

[marbly]

I have just made another post with a file at 18mm as apposed to the previous file which is shot at 42mm. Clearly ASP is not making the required correction on import.

I just came back here to the forum and was about to fire up ASP and LR to create examples to post here of a photo taken at 14mm. I am glad to see that you have been able to verify the problem already though. Thanks for posting.

[marbly]

Ok my previous file was at the long end i.e 42mm. I have done another test at 18mm and compared the LR and ASP rendition with the camera jpeg. Clearly LR is making corrections to match the camera jpeg and ASP is not. Clearly an untenable situation.

Yes, I agree.