Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: simplify on September 17, 2008, 10:32:57 pm

Title: Lens Cast in Lightroom
Post by: simplify on September 17, 2008, 10:32:57 pm
Hello,
I am currently using lightroom 2.0,  images processed in Lightroom compared to CaptureOne show a lens cast that is green on the left 10% of the image and magenta on the right 10%, and also slightly more dense on the right.  I am using a Mamiya AFD II and 120mm lens and 35mm lens, with PhaseOne P45+.  Is there a way to correct for this lens cast in lightroom?  It is extremely subtle, as I haven't noticed it for a month, but upon printing 20 16x20's in lightroom, they all have the slight variation.

Thanks,
Title: Lens Cast in Lightroom
Post by: stefan marquardt on September 18, 2008, 03:04:11 am
Quote
Is there a way to correct for this lens cast in lightroom?
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I know, this isn´t the best possible way, but for my ZD it´s the only (quick) way of dealing with the lens cast, particularly with white interiors. in lightroom i just use the brushes and either desaturate and/or paint tiny doses of green/magenta over the affected area.
I just finished a interior job , shoot similar pics with both the 5d and the zd and  - compared with the 5D - the Mamiya records (like I suppose other mf´s too) some fluorescent lightsources very yellowish. using the paintbrush (desat and blue) in lightroom to deal with that yellow cast works very good and makes lightroom a very effective and productive bit of software.

stefan
Title: Lens Cast in Lightroom
Post by: free1000 on September 18, 2008, 12:45:46 pm
Could you use two graduated filters?  I've found these useful for some colour corrections.

There is a video on Adobe's site showing how the grads work, they are on the same LR2 palette as the brushes.
Title: Lens Cast in Lightroom
Post by: simplify on September 18, 2008, 02:40:08 pm
Yes I think this will be the way to do it,  once I get it right I can just apply it to all of my images.  I started trying to do it, but am clueless with the gradient and I got frustrated and gave up.  I need to learn how to use it first.
Thanks.
Quote
Could you use two graduated filters?  I've found these useful for some colour corrections.

There is a video on Adobe's site showing how the grads work, they are on the same LR2 palette as the brushes.
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