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11-09-2012, 12:19 AM   #1
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Is this normal for D FA 100mm WR?

I was wondering is these kind of "color errors" typical for this lens or should i consider to change it. I just bought it. Is these just a problem of high contrast edges at max aperture? My Sigma 70mm 2.8 macro doesn't do this.

Few examples (test shots and so on):

D FA 100mm WR - Sam

You can click photos to original size. There are four photos at the moment.

Thanks for comments.

-Sami-

11-09-2012, 12:49 AM   #2
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That's some pretty major purple fringing going on. If you notice, the portrait shot of the trees you made at f/5.6 is much better than the others - you've stopped the lens down a bit for that one as opposed to the rest you shot wide open at f/2.8.

I can't say how normal that is for that lens, but it looks like you have one prone to it when shooting wide.

EDIT: You were also shooting slow, which means you were shooting in the dark (or close to it... ) 1/30 of a second @ f/2.8 means your light conditions kind of blew. Does the lens show similar effects when you fire your flash, or shoot during brighter conditions? It could simply be a matter of less-than-stellar conditions causing the fringing to show up on you.
11-09-2012, 01:01 AM   #3
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That's...pretty intense, and this is coming from a guy who doesn't mind a little fringing...
11-09-2012, 01:09 AM   #4
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QuoteOriginally posted by Eulogy Quote
That's...pretty intense, and this is coming from a guy who doesn't mind a little fringing...
Ditto. The only lenses I have (and I have some cheap, CHEAP lenses) that flare that much are the 400mm and 500mm Quantaray tube-o-dooms I own.

11-09-2012, 03:01 AM   #5
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Wow. That looks a bit extreme to me.
Not sure how the D FA 100 PF is normally but with my old FA 100 f2.8 macro I certainly have never seen PF anything remotely like that.

Will have to wait for other D FA owners to reply but one question - is there any accessories like a filter attached? And if so try it without.
11-09-2012, 05:59 AM   #6
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I have the DFA WR macro and I can say that's far from what I get with mine. My copy is a shining example that this design is normally nearly free of any optical flaws.
11-09-2012, 06:24 AM   #7
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Hello again! And thanks for comments.

I have done more tests and same problem is still. There is no filter attached. Problems does not dissappear completely when stopping down. I loaded more pictures if you want to check.
http://samsshots.smugmug.com/photos/i-2rNPpqx/0/XL/i-2rNPpqx-XL.jpg

I know these situation are really tough for lens and I realise that you should avoid this kind of situations. And these photos are not all I have taken, there are lot of good ones of course. But I don't want to buy f/2.8 lens and use it f/5.6 or smaller aperture. Lens is sharp and good otherwise.

I just contacted seller with few photos and next week my lens is going to service. They said if they could not do anything for "color errors", they will replace that to new one. This was relief.

-Sami-
11-09-2012, 06:28 AM   #8
s76
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sorry, this should work better
D FA 100mm WR - Sam
-Sami-

11-09-2012, 09:09 AM   #9
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There is definitely something wrong with this copy. Never seen purple fringing like this with my DFA100. Not with any other lens for that matter.
11-10-2012, 09:27 AM   #10
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I tried something similar to your shot of the ruler, there is some PF but does not seem as bad as your example. 1st is original, re-sized. 2nd is a 100% crop.

Last edited by Ex Finn.; 11-11-2014 at 05:46 PM.
11-11-2012, 08:18 AM   #11
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Isn't this called chromatic aberration?
11-11-2012, 08:27 AM   #12
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QuoteOriginally posted by Racer X 69 Quote
Isn't this called chromatic aberration?
I think in this case they can be used interchangeably. I think PF is a type of CA.
11-11-2012, 10:52 AM   #13
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My copy does show a lot of pf in high contrast situations wide open. especially if sun light is involved.
11-11-2012, 08:47 PM   #14
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In high contrast situations, my DFA 100 WR will exhibit PF. Given how easy it is to fix in Lightroom, it has never bothered me. I'm not sure I see anything that's all that unusual here.
11-12-2012, 09:43 AM   #15
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QuoteOriginally posted by Racer X 69 Quote
Isn't this called chromatic aberration?
QuoteOriginally posted by oxidized Quote
I think in this case they can be used interchangeably. I think PF is a type of CA.
The slight purple around the ruler markings in front of the plane of focus, or the green fringing behind the plane of focus is Longitudinal CA (not the easily correctable Lateral CA that gets worse at the edges - see here). That is normal CA, and I see it all the time with my DFA 100mm Macro at 2.8...

The broad purple fringing around the highlights is sensor overflow due to high contrast, and can be influenced by the type of sensor as well as the lens itself. My K-5 shows more of this purple fringing than my old K20D with the same lenses... but it's still quite a lot in those photos!
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