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Author Topic: 70-200mm f/2.8L IS II chromatic aberration  (Read 6514 times)

cheeseheadsaint

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70-200mm f/2.8L IS II chromatic aberration
« on: May 26, 2012, 01:15:50 PM »
Since getting the 70-200mm f/2.8L IS II last winter, this lens has been the most used lens. It's my first L and I love everything about it... except the chromatic aberration. One of the specs on the lens was that it was improved to minimize chromatic aberration. I guess 'minimize' is the key word because to me I feel like there is a good deal of chromatic fringing -equal to the amount I get from photos using the 55-250mm based off my experience.

But maybe I expected too much and maybe if I used the 55-250mm the color fringing would be even worse. At first I ignored it but lately when I edit photos, those purple fringes are really annoying. But I could be overreacting.

I'm not sure exactly how to do a 100% crop so I'm print screening what I see at 100%. This is unedited:
http://img689.imageshack.us/img689/7417/cafringing1.png
Canon Rebel XSi, kit lens, 50mm f1.8, ef-s 55-250mm IS, EF 70-200mm f/2.8L IS II, 6D

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70-200mm f/2.8L IS II chromatic aberration
« on: May 26, 2012, 01:15:50 PM »

drjlo

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #1 on: May 26, 2012, 01:54:55 PM »
I really haven't noticed much CA with my 70-200 MkII, definitely WAY less than with my 50L, 85L. 

However, if you are bothered by it, use DPP's DLO (Digital Lens Optimizer) module, which works even much better than DPP's CA correction module. 

bycostello

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #2 on: May 26, 2012, 02:08:47 PM »
i've had the mk2 for ages.. love  the lens and no problems...

cheeseheadsaint

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #3 on: May 26, 2012, 03:35:46 PM »
Would you consider my print screen to have minimal chromatic aberration?
Canon Rebel XSi, kit lens, 50mm f1.8, ef-s 55-250mm IS, EF 70-200mm f/2.8L IS II, 6D

thien135

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #4 on: May 26, 2012, 04:08:19 PM »
What type of filter are u using with the lens?

bornshooter

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #5 on: May 26, 2012, 04:52:03 PM »
I havent had any problems either if you have a filter on it take it off and see if it improves

B-Man

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #6 on: May 26, 2012, 05:41:02 PM »
i've had the mk2 for ages.. love  the lens and no problems...

No problem with my mk2 as well.

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #6 on: May 26, 2012, 05:41:02 PM »

Marsu42

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #7 on: May 26, 2012, 05:48:56 PM »
I guess 'minimize' is the key word because to me I feel like there is a good deal of chromatic fringing

Just use Lightroom 4.1RC2 with its new CA reduction and lens profiles, problem solved. CAs and vignetting aren't a problem if you do any postprocessing other than Microsoft paint, leaving only sharpness & focus (af on body & lens) to worry about.

Kernuak

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #8 on: May 26, 2012, 06:10:37 PM »
While I don't have the lens, something isn't right, as I am yet to come across any L lens with that much fringing. The 17-40 and 24-105 have quite a bit of CA at the wide end, but nothing like that. In addition to looking at filter use, make sure both the front and back elements are clean.
Canon 5D MkIII, 7D, 300mm L IS f/2.8 and a few other L's

TrumpetPower!

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #9 on: May 26, 2012, 07:16:30 PM »
What type of filter are u using with the lens?

My exact first thought, as well.

b&

D_Rochat

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #10 on: May 26, 2012, 09:46:03 PM »
I have this problem with my 24-70, but not my 70-200 mkII. My 70-200 mkII is flawless.

MazV-L

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #11 on: May 27, 2012, 01:30:55 AM »
Looks shocking :o Definitely something wrong there. I have the 70-200mm 2.8L is ii, love it and have no such problems with it!!

Radiating

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #12 on: May 27, 2012, 04:24:58 AM »
What you're seeing is purple fringing. The lens has no lateral chromatic abberation, but all long lenses suffer from purple fringing except for the Canon supertelephoto lenses and Leica APO lenses. If the lens corrected for purple fringing it would cost $11,000, and weight 3 times as much and be a cousin of the 200-400mm f/4.0 IS TC that's coming out.

Just correct it with DXO mark or lightroom.

On an related note, I would pay $10,000 for a 200-400mm f/4.0 TC with a wider focal length and faster aperture, say a 70-200mm f/2.0 IS TC :)

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #12 on: May 27, 2012, 04:24:58 AM »

birtembuk

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #13 on: May 27, 2012, 05:06:13 AM »
i've had the mk2 for ages.. love  the lens and no problems...

I don't see CA either w/ my 70-200/II and I'm usually quite bothered with it. Agree about DDP DLO which is a useful add-on (and also works fine with 35L - which for one exhibits quite its fair bit of CA).

Kernuak

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #14 on: May 27, 2012, 07:46:13 AM »
What you're seeing is purple fringing. The lens has no lateral chromatic abberation, but all long lenses suffer from purple fringing except for the Canon supertelephoto lenses and Leica APO lenses. If the lens corrected for purple fringing it would cost $11,000, and weight 3 times as much and be a cousin of the 200-400mm f/4.0 IS TC that's coming out.

Just correct it with DXO mark or lightroom.

On an related note, I would pay $10,000 for a 200-400mm f/4.0 TC with a wider focal length and faster aperture, say a 70-200mm f/2.0 IS TC :)
The only time I saw as much fringing as that, was with my old Carl Zeiss Jena 70-300 with 3x converter and I use telephoto lenses all the time.
Canon 5D MkIII, 7D, 300mm L IS f/2.8 and a few other L's

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Re: 70-200mm f/2.8L IS II chromatic aberration
« Reply #14 on: May 27, 2012, 07:46:13 AM »