[Christine Tham]

First of all - some caveats ...

These are Adobe lens profiles created by me, for my specific lenses on my camera. I don't guarantee that they will work well on your camera or your lenses - they seem to work okay for me.

Secondly, these lens profiles do not include lens design data (well, I don't have access to the data so there) so they won't be as good as the manufacturer created lens profiles that comes with Lightroom or Adobe Camera Raw. For some of you, that means you may get better results using the Lightroom supplied ones, even though they are created for a different body.

Thirdly, a warning - using these lens profiles CORRECTLY requires you to MANUALLY edit EXIF data - the way adobe lens profile corrections work is that they build an internal model of the lens vignette, chroma and perspective distortions, which are dependent on focal length, focus distance and aperture - and Adobe uses the EXIF data to apply the correction to each image.

IF YOU DO NOT KNOW HOW TO EDIT EXIF DATA ON YOUR IMAGES, DON'T BOTHER USING THESE LENS PROFILES. And if you manually apply them anyway, don't be surprised if the correction may not be optimal.

What I do is I use a Mac OSX program called EXIF Editor (purchased from the App Store) to edit the EXIF data on my images. I create a EXIF profile for each lens with the necessary EXIF tags, then I apply the profile prior to import and manually enter the aperture value for the shot.

Here is a list of EXIF data that I apply:

• F Number
• Aperture Value
• Focal Length
• Focal Length in 35mm Format
• Lens Make
• Lens
• Lens Model
• Lens Type (Pentax specific)

Lastly - the vignette model sometimes over-corrects on some lenses. This is because vignetting actually depends on focus distance. As I don't enter focus distance in the EXIF data (I can't remember what focus distance I have used for each, and it's going to be approximate anyway), the vignette correction will only be accurate if I capture a shot at the same focus distance as the calibration images used to build the lens profile. Generally I build the lens profile focusing at around 1-2m. In Lightroom, the amount of vignetting correction can be adjusted after the profile has been applied, so I generally manually adjust if there is over-correction.

[Christine Tham]

Okay, first lens profile - decided to submit a lens profile for the humble but rather charming Pentax smc A50mm f1.7

EXIF Parameters to manually insert into your image before applying the lens profile correction:

• F Number = 1.7 (or whatever the actual F Number for the image is)
• Aperture Value = 1.7
• Focal Length = 50
• Focal Length in 35mm Format = 50
• Lens Make = smc PENTAX
• Lens = smc PENTAX-A 50mm F1.7
• Lens Model = smc PENTAX-A 50mm F1.7
• Lens Type (Pentax specific) = A Series Lens

[Christine Tham]

Next up - the venerable Pentax smc FA-43mm Limited

EXIF Parameters to manually insert into your image before applying the lens profile correction:

• F Number = 1.9 (or whatever the actual F Number for the image is)
• Aperture Value = 1.9
• Focal Length = 43
• Focal Length in 35mm Format = 43
• Lens Make = smc PENTAX
• Lens = smx PENTAX-FA 43mm F1.9 Limited
• Lens Model = smx PENTAX-FA 43mm F1.9 Limited
• Lens Type (Pentax specific) = smx PENTAX-FA 43mm F1.9 Limited

[hinman]

@Christine, thank you so much for your kind and generous efforts -- you are our Sony hero. Please be kind to yourself as well as we don't want you to hurt your hands from typing in the holiday.

Warmest,
Hin

[Christine Tham]

Pentax smc FA* 24mm

EXIF Parameters to manually insert into your image before applying the lens profile correction:

• F Number = 2 (or whatever the actual F Number for the image is)
• Aperture Value = 2
• Focal Length = 24
• Focal Length in 35mm Format = 24
• Lens Make = smc PENTAX
• Lens = smc PENTAX-FA* 24mm F2 AL[IF]
• Lens Model = smc PENTAX-FA* 24mm F2 AL[IF]
• Lens Type (Pentax specific) = smc PENTAX-FA* 24mm F2 AL[IF]

[Christine Tham]

Pentax smc A 100mm macro

EXIF Parameters to manually insert into your image before applying the lens profile correction:

• F Number = 4 (or whatever the actual F Number for the image is)
• Aperture Value = 4
• Focal Length = 50
• Focal Length in 35mm Format = 50
• Lens Make = smc PENTAX
• Lens = smc PENTAX-A macro 100mm F4
• Lens Model = smc PENTAX-A macro 100mm F4
• Lens Type (Pentax specific) = A Series Lens

[Christine Tham]

Pentax smc A 135mm F2.8

EXIF Parameters to manually insert into your image before applying the lens profile correction:

• F Number = 2.8 (or whatever the actual F Number for the image is)
• Aperture Value = 2.8
• Focal Length = 135
• Focal Length in 35mm Format = 135
• Lens Make = smc PENTAX
• Lens = smc PENTAX-A 135mm F2.8
• Lens Model = smc PENTAX-A 135mm F2.8
• Lens Type (Pentax specific) = A Series Lens

[Christine Tham]

Leica Summicron-M 1:2/50

EXIF Parameters to manually insert into your image before applying the lens profile correction:

• F Number = 2 (or whatever the actual F Number for the image is)
• Aperture Value = 2
• Focal Length = 50
• Focal Length in 35mm Format = 50
• Lens Make = Leica
• Lens = Summicron-M 1:2/50
• Lens Model = Summicron-M 1:2/50

[Christine Tham]

That's it guys - I have run out of attachment space on my account so unable to post anymore lens profiles.

Merry Christmas!