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06-01-2010, 01:24 PM   #1
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Adobe lens correction profile: K-7 + DA 12-24mm F4

Hey!

I already commented on the ongoing thread "Adobe lens profiles wanted" But I figured that maybe people with K-7 + DA 12-24mm would notice this better with its own thread. So here it is. (If moderators think this is unnessecary, please delete this tread)

I tried to do a profile for my combination PENTAX K-7 + DA12-24mm f4 lens. I took a 54 photo series (@ 12mm, @18mm, @ 24mm and @f4, @f11). Focus distance to the grid was about 1 metre in 12mm shots, 1,2 meters in 18mm shots and 1,8 meters in 24mm shots. I used Adobes A2 sized 27x43 with 36pts squares. Lightning were two light at both sides. Tripod and a cable release used.

I tried to do this so well that I could, and I was quite pleased that out of 54 photos only two had invalid grids (one @12mm f4 set, and one @12mm f11 set)

I have just barely tested this profile and experienced just mediocre results with it, for my eye you face substantial image loss at edges when using geometric correction. Chromatic aberration correction seems to work okay. vignetting I havent' tested yet.

So I'll put a link to my dropbox where you can download the profile and test it out. If it's utter crap I'll try again maybe But if you find it useful that's good.

Hopefully this is a okay place to post this kind of request to test profile more througly.

link to the profile : http://dl.dropbox.com/u/2655364/PENTAX%20K-7%20%28smc%20PENTAX-DA%2012-24mm%...%20-%20RAW.lcp

Greets
-Juho

06-01-2010, 01:58 PM   #2
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Have you tested it against the built-in correction in the K-7?
06-01-2010, 03:45 PM   #3
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The lensfun library has a correction for the lens. As I don't own one I haven't been able to try it. Can anyone help here?

Http://lensfun.berlios.de
06-02-2010, 10:23 AM   #4
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Original Poster
QuoteOriginally posted by RawheaD Quote
Have you tested it against the built-in correction in the K-7?
I'm sorry I have now so busy time at work. I posted it here so if someone has time and will they could test it.

I will test it myself maybe next week...

----------

QuoteQuote:
The lensfun library has a correction for the lens. As I don't own one I haven't been able to try it. Can anyone help here?

Http://lensfun.berlios.de
Have to test that one as well

-J

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