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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 17 Aug 2014 (Sunday) 04:32
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Other options than 85 1.8 to avoid CA / purple fringing ?

 
CanonYouCan
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Aug 17, 2014 04:32 |  #1

I have the 85 1.2L MKI, 135L, 70-200 2.8L II portrait lenses allready
85L also has CA, I bought the 85 1.8 for the faster action, but the purple borders around faces, t-shirts,.... is really disturbing :(

I just did some shots on a playground of my daughter, the sunlight wasn't so extreme and again lots of purple.
Then I tested shots on the same place with same sunlight with my Sigma 35 1.4 Art at f1.4, 135L at f2 and no purples...

What would you buy instead, I thought of :
- Sigma 85 1.4, or is this one also so sensitive to CA / purple fringing and not much faster focussing than 85L MKI ?
- Canon 100 f2 or Canon 100 2.8 macro
- Or just rebuy the Tamron 24-70 2.8 VC zoom and use it at 70mm f2.8 for shots with moving subjects and a reasonable compact zoomlens.

I know that CA is fixable in pp, but it's a lot of work each time, I like to have out of the cam optical quality.


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davidfarina
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Aug 17, 2014 06:21 |  #2

Do you really need a 85? I mean you have the 85L and a 135L, which would both have been my recommendation...


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garbidz
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Aug 17, 2014 06:27 |  #3

Lightroom profiles help you to get rid of the purple fringes cheaper than buying a new lense. I know you know this.
I have the 100mm f/2.0 and it makes purple bokeh fringes full open so it won't be your solution.


Ooops, sorry. It is not the lens. the purple fringes only become visible in LR at normal preview but once enlarged, they disappear.
There must be something there how LR is rendering its thumbnails. The "Fringe Finder" cannot find anything to fix. You cannot see any fringes on the exported picture.
I keep getting keepers on the 100mm f/2.0 at a reasonable price. I put a 3rd party hood on to make it look a bit more professional, as it is quite discreet.

It is one of the better lenses I've got.
(In fact, according to the Photozone test site, it is one of the sharpest lenses that they ever have tested)


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frugivore
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Aug 17, 2014 06:36 |  #4

The Sigma has CA also. Just stop down and/or remove it in post.




  
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ekkybedmond
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Aug 17, 2014 07:03 as a reply to  @ frugivore's post |  #5

Ah, the advantanges of digital ....




  
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CanonYouCan
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Aug 17, 2014 08:41 |  #6

Yes in LR when I click on that colour pencil I can click on the purple edges and pull the slider so that they get grey, but somehow I have the feeling I lose sharpness/detail when the edges washed out, especially in faces this isn't nice...

garbidz wrote in post #17101029 (external link)
Lightroom profiles help you to get rid of the purple fringes cheaper than buying a new lense. I know you know this.
I have the 100mm f/2.0 and it makes purple bokeh fringes full open so it won't be your solution.


Ooops, sorry. It is not the lens. the purple fringes only become visible in LR at normal preview but once enlarged, they disappear.
There must be something there how LR is rendering its thumbnails. The "Fringe Finder" cannot find anything to fix. You cannot see any fringes on the exported picture.
I keep getting keepers on the 100mm f/2.0 at a reasonable price. I put a 3rd party hood on to make it look a bit more professional, as it is quite discreet.

It is one of the better lenses I've got.
(In fact, according to the Photozone test site, it is one of the sharpest lenses that they ever have tested)


Sony A7 III | Metabones V | Canon 16-35 F4 L | Sigma 85 1.4 Art | 70-200 2.8L II
Lighting : Godox AD600B TTL + Godox V860II-S + X1T-S
Modifiers: 60cm Collapsible Silver Beautydish + grid | Godox 120cm Octagon softbox + grid + Speedlite Flash bender
Tripod: Vanguard Alta 253CT carbon

  
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garbidz
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Aug 17, 2014 08:46 |  #7

frugivore wrote in post #17101039 (external link)
The Sigma has CA also. Just stop down and/or remove it in post.


You have a point there. Why don't people just do the necessary moves to get rid of the stuff that annoys them and go to the next issue.

I cannot understand.
If you have come up with an explanation, please share.
I want pictures that my clients are happy with.

Or that satisfy me personally.
Which ever way, it has never been a technical flaw...it is alway how I did not manage to direct the shoot. As long as you can, it is about what you want, about patience.
If you cannot, go on an blame the equipment...

The modern cameras can do everything. What is the role of the photogrqpher?
In my mind it is to put something worth sharing in the view finder before pushing on 'click'.
Nothing to do about pixels or megabites.

About the eye.


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Talley
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Aug 17, 2014 08:52 |  #8

My sigma has CA. I just remove it in post. It's a damn sharp lens.


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raptor3x
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Aug 17, 2014 09:04 |  #9

CanonYouCan wrote in post #17100950 (external link)
I know that CA is fixable in pp, but it's a lot of work each time, I like to have out of the cam optical quality.

If you're using LR it's really quite trivial to fix in post. Click purple fringe, click green fringe, sync, and all of your photos are fixed. Takes maybe 15 seconds to do all your shots. That said, I think all the other 85 options actually have more fringing than the 1.8. The 100 f/2 supposedly has slightly less but I've never actually tried it. If you can tolerate having any fringing then you're probably stuck with the 24-70 or a 70-200.


Bodies: X-T1, E-M1ii, G9 Lenses: µ.Z 7-14 2.8, µ.Z 12-40 2.8, µ.Z 25 1.2, X 18-55 2.8-4, µ.Z 40-150 2.8, µ.Z 45 1.2, µ.Z 60 2.8, µ.Z 75 1.8, PL 200 2.8

  
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pkim1230
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Aug 17, 2014 09:32 |  #10

I would give Opteka 85mm f/1.8 a try



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CanonYouCan
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Aug 17, 2014 10:56 |  #11

I'll give it a last try and shoot less wide open, at f2 or f2.8, I don't know if there is much copy variation or if I have a bad copy.
Also my iso was ISO200 and ISO100 was better (maybe this caused even more purple).
Maybe a lot of us owning fast lenses shoot too much (some always) wide open :-D


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MalVeauX
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Aug 17, 2014 15:13 |  #12

CanonYouCan wrote in post #17101411 (external link)
I'll give it a last try and shoot less wide open, at f2 or f2.8, I don't know if there is much copy variation or if I have a bad copy.
Also my iso was ISO200 and ISO100 was better (maybe this caused even more purple).
Maybe a lot of us owning fast lenses shoot too much (some always) wide open :-D

Heya,

We get fast lenses for the wide open shots. Deal with CA in post.

Very best,


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EverydayGetaway
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Aug 17, 2014 18:28 |  #13

pkim1230 wrote in post #17101262 (external link)
I would give Opteka 85mm f/1.8 a try

OP has an 85mm L, he's only using the 85/1.8 because he needs the faster AF... plus, Opteka has more CA than the EF85mm from what I've seen.

I would go with either the 100/2 or just use what you've got, there's not that much difference FL wise between 100mm and 135mm. Heck, I'd just use your 70-200mm if it were me... that's the only reason I want one, shooting moving subjects with MF gets a little too difficult sometimes :lol:


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Other options than 85 1.8 to avoid CA / purple fringing ?
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