Creating Lens correction profile for Sony RX100IV ?

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_andreas_
Posts: 12
Joined: Sat Jan 28, 2012 4:21 am
operating_system: Mac
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motherboard: MacBook Pro Retina 13inch - Late 2012
processor: i5 2.5 Ghz
ram: 8GB
Hard_Drive_Capacity: 128 GB
Location: Munich/Germany

Creating Lens correction profile for Sony RX100IV ?

Post by _andreas_ »

ASP 2.3.0.99 (Mac) has no lens correction profile for the Sony RX100 IV yet. (same lens as RX100 III)

The RX100 internal makes heavy lens distorsion corrections from Raw to Jpg especially at the wide end of the lens.

My second raw-converter is "Iridient Developer" - there is at the "lens distorsion correction menu" an option "use source image metadata" - Click, and thats it.
So I investigate the exifs with Phil Harveys "exiftool" and found an interesting line:

Distortion Corr Params : 11 -137 -129 -125 -125 -134 -151 -175 -185 -165 -103 0 0 0 0 0 0

Does anybody know what this values are stand for? - Google has no idea to interpret... ;)

Is it possible to convert this values into an ASP-readable Lens Profile? How?

ASP lens correction profiles looks like this. (and "cal_abc" contains the crucial values [focal length, a, b, c])

begin lens
group: fujiX
multiplier: 1.5
aperture: 1.4
menu_lens: XF35mmF1.4 R
cal_abc: 35.0 0.00729 -0.02422 0.02113
end


Any idea is very welcome.

Thanks in advance.

Andreas
_andreas_
Posts: 12
Joined: Sat Jan 28, 2012 4:21 am
operating_system: Mac
System_Drive: N/A
32bit or 64bit: 64 Bit
motherboard: MacBook Pro Retina 13inch - Late 2012
processor: i5 2.5 Ghz
ram: 8GB
Hard_Drive_Capacity: 128 GB
Location: Munich/Germany

Re: Creating Lens correction profile for Sony RX100IV ?

Post by _andreas_ »

... 2 months later:

I found this lines in Lensfun.db *) for the RX100M3 which has the same lens.
Modified my profile_sony.txt for the RX100M4 and it works fine. :D

Andreas

*) https://github.com/LebedevRI/lensfun/bl ... t-sony.xml

Code: Select all

begin camera
group: sonyRX100
multiplier: 2.70
menu_make: Sony
menu_model: RX100IV
exif_make: SONY
exif_model: DSC-RX100M4
end

begin lens
group: sonyRX100
multiplier: 2.70
calibrated: false
menu_lens: Standard
cal_abc:   8.8  0.02266  -0.09581  0.00190
cal_abc:  10.9  0.02376  -0.09457  0.03217
cal_abc:  13.0  0.02326  -0.08674  0.04569
cal_abc:  14.7  0.02340  -0.08395  0.04970
cal_abc:  16.6  0.02045  -0.06253  0.02684
cal_abc:  20.0  0.02295  -0.06814  0.05127
cal_abc:  25.7  0.02377  -0.06078  0.04156
end
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