?? Lightroom and non-Canon lenses ??

I just acquired a Tamron 24-70mm VC lens. My other non-Canon lenses are Rokinon 12mm FE and Sigma 15mm FE. Distortion is not an issue with with those. The Tamron has heavy barrel distortion at 24mm, and 2+ EC vignetting at f/2.8 & 70mm. Lightroom has a profile that works really well, IF I SHOOT RAW. I don't always shoot raw, but I see wanting to make those corrections frequently. Is there a way to make corrections to JPG output (the profile is much better than my attempts to correct manually), or should I just always shoot this lens raw?

BTW, LR tools don't work very well on the vignetting at 70mm. It is moderately strong, but it is pushed well into the corners. It is only a problem at f/2.8 - f/3.5.

PDFs and download links at:
https://helpx.adobe.co​m …hop/digital-negative.html

Thanks. But why bother with DNG when I can just work the .cr2 files.

Bassat wrote in post #17931628
Thanks. But why bother with DNG when I can just work the .cr2 files.

Who said anything about DNG? I thought you were looking for a lens profile for the Tammy 24-70 that can be used with SOOC jpgs. You can check to see if anybody has put one online or you can make your own.

I didn't realize the profiles only worked with RAW files, interesting.

The link in post #2 takes me to a description of DNG. Nothing there about JPG profiles.

Lens profile creator:

https://www.adobe.com …duct=193&platfo​rm=Windows

http://blogs.adobe.com …profile-creator-tool.html

The link Elie posted is the link that the Lens Profile Creator page provides - it is not correct, obviously.

from: http://blogs.adobe.com …profile-creator-tool.html

Thank you. I did assume the link was bad. I did not mean to blame the post-er, if that is how it came across.

I did look at the Profile Creator page. Way too involved for a lazy slug like me. I just wanted a downloadable profile. I'll just shoot the Tammy raw. Problem solved. LR has a profile for the lens if I shoot raw. Works like a charm.

I made some test charts for my Canon 15mm circular fisheye back when the lens profile creator first came out. It is not worth the hassle unless you have a very specialized need for a correction that does not exist.

kirk

How about that! I found an image I shot when I made the profile - Canon 5D.

The Profile Creator page states that using it is cumbersome and involved. CR2 solves all of that. I'll just shoot raw. Thanks.

kirkt wrote in post #17931956
I made some test charts for my Canon 15mm circular fisheye back when the lens profile creator first came out. It is not worth the hassle unless you have a very specialized need for a correction that does not exist.

kirk

How about that! I found an image I shot when I made the profile - Canon 5D.

Kirk, you *must* use 5 printed charts, one in each corner, and the center one, for wide-angle lenses. Using just one, as you show here, won't fix the corners correctly.

Back in caveman times when I did this for my 5D, one chart was good enough! At least that's what the future net ructions said.

Now I use better lenses and let DXO do the work for me.

kirkt wrote in post #17932359
...Now I use better lenses and let DXO do the work for me...

THIS is what I was going to recommend.