A question for the Kelby apostles among the forum
I have a few thousand picture to process in Lightroom (5.2 since yesterday evening)
To my suprise even Lightroom 5.1 had already full support for the new Canon EF-M 11-22
And anyway there always seems to be every Canon lens my hearts desire to be available in Lightroom.
Now with 5.2 I try to find the correction for my Sigma 17-35 1.8 and the only thing Lightroom offers me are 4 rather obscure lenses... Am I doing something wrong or is Adobe just ignoring Sigma?
If there is such a correction already out, how to get it and how to make it visible in Lightroom?
Good question ... but what does Kelby have anything to do with this?
Anyway, I found this on the net (might interest you) How to add a missing Lens Profile using Lens Profile Creator
Correcting chromatic aberration and vignetting issues in your images by manually adjusting the sliders in Lightroom works fine for most cases, because you can easily see CA and vignetting in images. Distortion, however, is not as easy to fix, because an image would have to contain straight lines from corner to corner in order for you to correctly fix them. If you shoot with fisheye or ultra-wide angle lenses that suffer from severe distortion, you might be able to visually fix most images, but the results might not be consistent from image to image.
If you want to have consistent results, the best thing to do is to either wait for Adobe to release your lens profile, or to create it yourself. The latter would obviously be much quicker than waiting for Adobe, but as you will see from the steps below, it would take a significant amount of time and effort on your side.
Adobe Lens Profile Creator
Here are the steps to this process:
Download and unzip the Lens Profile Creator
Go to the Calibration Charts folder, select a calibration chart to fit your printer and paper, print it out and then mount it on a planar surface in a room with plenty of ambient light.
Take pictures of multiple checkerboard images (a minimum of three images are required, but nine are recommended) for each camera/lens settings that you are interested in obtaining the lens profiles for.
Convert your RAW images to DNG format and make sure that full EXIF data is preserved.
Process the raw DNG images (or the JPEG/TIFF images if you prefer creating lens profiles for the non-raw workflow) through the Lens Profile Creator to create the custom lens profile.
Save the lens profiles that you have created into the specific lens profiles folder(s) that Photoshop CS5, Camera Raw and Lightroom would be looking for them for lens corrections.
So, in order for you to be able to create an image, you need to print out a test chart, photograph it and then feed the images to Lens Profile Creator to create a profile. Bear in mind that if you shoot with multiple camera bodies with different sensors, you will have to create profiles for each camera/lens combination. For example, if you own Nikon D800 and Nikon D7100 cameras and you have a Nikon 24mm f/1.4 lens, you will have to mount the lens on both cameras and create two separate profiles. The reason why you have to do this, is because different cameras/sensors handle lenses differently and in the case of FX vs DX, issues such as distortion and vignetting will appear less obvious on DX when compared to FX, because the corners are chopped off.
If you use multiple lenses or different cameras, I would recommend to create lens profiles for all of your lenses and cameras at once. The process is time-consuming, but pretty straightforward and you should not have any problems with creating the profiles.
Once the profiles are generated (LCP file extension), save the files into the “C:\Users\All Users\Adobe\CameraRaw\LensProfiles\1.0″ folder if you are using Windows Vista/7/8 (for other operating systems, refer to Adobe Lens Profile Creator documentation inside the documentation folder) and relaunch Lightroom. Once you do that, your images should be automatically recognized when you click “Enable Profile Corrections” within Lens Corrections in Lightroom.
By the way, there are other third party software tools such as DxO Optics Pro and PTLens that contain hundreds of camera/lens combinations that you might not find in Lightroom. If you have rare lenses, you might want to give those tools a try, since they will probably have more lens profiles than Lightroom.
Read more: http://photographylife.com/lightroom-lens-corrections#ixzz2fEpCEWna