DXO PhotoLab and Teleconverters

**Larrymc** · 12-16-2022, 03:33 PM

Originally posted by AjaLx

See my (updated) answer above for an example of the difference.
Full size pictures can be downloaded from my dropbox

looking at your dropbox images it is very obvious that the modified images are sharper.

**UncleVanya** · 12-16-2022, 06:23 PM

Originally posted by AjaLx

See my (updated) answer above for an example of the difference.
Full size pictures can be downloaded from my dropbox

Wow! I may have to try this.

**Larrymc** · 12-16-2022, 06:59 PM

Originally posted by UncleVanya

Wow! I may have to try this.

Well you have the TC and the Lens and also DXO PhotoLab! What's stopping you?

**UncleVanya** · 12-16-2022, 10:26 PM

Originally posted by Larrymc

Well you have the TC and the Lens and also DXO PhotoLab! What's stopping you?

TIME… lol. I’ll get around to it eventually.

**ehrwien** · 12-17-2022, 01:35 PM

That could be a game changer

Will have to try this with a few files, perhaps even some "proper" comparison with and without TC, with and without the hack.

AjaLx · 12-18-2022, 11:31 AM - **2 Likes**

Since this subject needed a refresh for me as well, I took another look at my exiftool scripts today and improved them.
Perhaps also useful for some others?

Using a cmd file that can edit an entire folder.

1) To Update FocalLength (Previous version I set them always to 250 in case >250, now focallength / 1.4
set DngPath="D:\some foldername"
exiftool -overwrite_original "-SerialNumber<focallength" "-focallength<${focallength#;$_*=0.714285714286}" -if "$focallength#>250" %DngPath%

2) RestoreFocalLength; copy previous saved FocalLength back from SerialNumber (contains 'mm') | Can be used for DNG as well as JPG files
Beware, these SerialNumbers are MY serial numbers.
set DngPath="D:\some foldername"
exiftool -overwrite_original "-focallength<SerialNumber" "-SerialNumber=6100229" -if "$Model# eq 'PENTAX K-3' and $SerialNumber=~/mm/" %DngPath%
exiftool -overwrite_original "-focallength<SerialNumber" "-SerialNumber=8085878" -if "$Model# eq 'PENTAX K-3 Mark III' and $SerialNumber=~/mm/" %DngPath%

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12-16-2022, 03:33 PM	#16
Larrymc Site Supporter Join Date: Jun 2014 Location: Mississippi, USA Posts: 5,025 Original Poster	Originally posted by AjaLx See my (updated) answer above for an example of the difference. Full size pictures can be downloaded from my dropbox looking at your dropbox images it is very obvious that the modified images are sharper.

12-16-2022, 06:23 PM	#17
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 24,775	Originally posted by AjaLx See my (updated) answer above for an example of the difference. Full size pictures can be downloaded from my dropbox Wow! I may have to try this.

12-16-2022, 06:59 PM	#18
Larrymc Site Supporter Join Date: Jun 2014 Location: Mississippi, USA Posts: 5,025 Original Poster	Originally posted by UncleVanya Wow! I may have to try this. Well you have the TC and the Lens and also DXO PhotoLab! What's stopping you?

12-16-2022, 10:26 PM	#19
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 24,775	Originally posted by Larrymc Well you have the TC and the Lens and also DXO PhotoLab! What's stopping you? TIME… lol. I’ll get around to it eventually.

12-17-2022, 01:35 PM	#20
ehrwien Site Supporter Join Date: May 2016 Posts: 2,151	That could be a game changer Will have to try this with a few files, perhaps even some "proper" comparison with and without TC, with and without the hack.

12-18-2022, 11:31 AM - 2 Likes	#21
AjaLx New Member Join Date: Oct 2019 Photos: Albums Posts: 9	Since this subject needed a refresh for me as well, I took another look at my exiftool scripts today and improved them. Perhaps also useful for some others? Using a cmd file that can edit an entire folder. 1) To Update FocalLength (Previous version I set them always to 250 in case >250, now focallength / 1.4 set DngPath="D:\some foldername" exiftool -overwrite_original "-SerialNumber<focallength" "-focallength<${focallength#;$_*=0.714285714286}" -if "$focallength#>250" %DngPath% 2) RestoreFocalLength; copy previous saved FocalLength back from SerialNumber (contains 'mm') \| Can be used for DNG as well as JPG files Beware, these SerialNumbers are MY serial numbers. set DngPath="D:\some foldername" exiftool -overwrite_original "-focallength<SerialNumber" "-SerialNumber=6100229" -if "$Model# eq 'PENTAX K-3' and $SerialNumber=~/mm/" %DngPath% exiftool -overwrite_original "-focallength<SerialNumber" "-SerialNumber=8085878" -if "$Model# eq 'PENTAX K-3 Mark III' and $SerialNumber=~/mm/" %DngPath%

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