Anyone tried taking out lens cast on your digi lenses?

[Icarebecauseyoudo]

Get a bit of white perspex and put it right in front of the lens.

Take a shot without it and expose correctly. Then quadruple the exposure time with the plastic in front of the lens. If you are fussy do the same for all different f numbers, or the ones you use most.

You should get a mid grey image. Give it more or less time if you don't.

You also may see colour casts and vignetting created by the lens. It may be that your sensor compensates for them, it'll depend which lens you are using. All will have slightly different characteristics

If you find it is really bad there is a very neat and easy feature on capture one for taking it out of your photos

Classic lens colour cast shows magenta on right, green on left

Hereby ends the lesson

[Iain Hesford's Bait Box]

Originally Posted by Icarebecauseyoudo

Get a bit of white perspex and put it right in front of the lens.

Take a shot without it and expose correctly. Then quadruple the exposure time with the plastic in front of the lens. If you are fussy do the same for all different f numbers, or the ones you use most.

You should get a mid grey image. Give it more or less time if you don't.

You also may see colour casts and vignetting created by the lens. It may be that your sensor compensates for them, it'll depend which lens you are using. All will have slightly different characteristics

If you find it is really bad there is a very neat and easy feature on capture one for taking it out of your photos

Classic lens colour cast shows magenta on right, green on left

Hereby ends the lesson

I'm going to have to acquire Capture One aren't I.

[Icarebecauseyoudo]

Useful too for light fall-off you get with wide lenses

Especially useful if you are trying old lenses with an adapter on your DSLR

Remember to take filters off else it will compensate for them

[Iain Hesford's Bait Box]

Originally Posted by Icarebecauseyoudo

Useful too for light fall-off you get with wide lenses

Especially useful if you are trying old lenses with an adapter on your DSLR

Remember to take filters off else it will compensate for them

Lightroom does have lens profiles/lens corrections where it corrects perspective and gets shot of the vignetting.. Think it's doing the same job? Applying lens profiles is virtually the first thing I do when I import raw files.

http://helpx.adobe.com/x-productkb/m...ghtroom-4.html

[HebburnMackem]

Originally Posted by Iain Hesford's Bait Box

Lightroom does have lens profiles/lens corrections where it corrects perspective and gets shot of the vignetting.. Think it's doing the same job? Applying lens profiles is virtually the first thing I do when I import raw files.

http://helpx.adobe.com/x-productkb/m...ghtroom-4.html

Sometimes I leave it off if I want a slight fish bowl look... depends on the shot