unknow affect in picture .

[photocist]

It happens because a) different color wavelengths are diffracted at different angles, so they tend to spread out. b) most likely your lens is not aspherical. spherical lenses (Where the glass elements are perfectly curved, as opposed to a slight parabolic curve) do not focus all wavelengths of light in the same place.

 

[huujason]

Here are more pic of the effect
all took HAND HELD at F1.8

CROP DOWN

 

[photocist]

That is chromatic aberration, 100%

 

[o hey tyler]

It doesn't matter if you take the photo hand held or not, it's a lens property. If you stopped your lens down to f/2.2 or further, you probably wouldn't have as much of an issue. Shooting wide open WILL NOT render the best image quality.

 

[huujason]

Hey tyler
this happen for all the lenses? i hope a have a good copy.
the lens im using is a carl zeiss 135mm f1.8, scores near perfect in reviews
after i saw this effect im thinking of returning the lens.


MORE PICS
ALL AT F1.8

CROP

 

[arpan]

Omg I was not able to see that green tint

 

[KmH]

The examples of the tree branches you posted is a specific Ca known as 'purple fringing': Purple fringing - Wikipedia, the free encyclopedia

 

[thebutler4]

Are you shooting with a UV filter? If you are not .. that may solve your issue.

 

[clanthar]

It's correct that some degree of CA is going to show up for nearly all lenses, but it's quite variable between types and brands. It's worse and more common in zoom lenses. In a Zeiss fixed focal length lens it should be very well controlled -- better than evident here. My Zeiss vario-sonnar is much better than what shows in these photos. I also shoot Canon L series zooms and they're better. In fact the Schneider zoom on my Samsung pocket camera is dramatically better. O hey tyler is correct that stopping down should help subdue CA, but I'd expect better from that lens.

Joe

 

[clanthar]

I needed to run a comparison for this. I took my Samsung pocket camera (TL-500) and ran out onto the porch. I did everything I could to make the CA as bad as possible. I used the wide end of the zoom range where CA is worse. I placed the white painted railing at the frame edge where CA is worse. I manually set the lens wide open to f/1.8 where CA is worse. I got CA as I expected I would, but it's not bad. The photos above from the 135mm Sonnar look more like photos from $129.00 Casio -- sorry. I'd be taking that lens back.

Here's the shot:

Joe

 

[AlexColeman]

is this mean my lens could be defected ?

I don't think it is. CA is present in all lenses. Some lenses treat it better than others, but CA is to a camera lens like belly buttons are to people.... we all have one.

Lateral Chromatic Aberration is in every lens, its simply a result of the lens not focusing every spectrum of light back on one point. Some lenses show it more then others, such as cheap lenses, and long fast primes. There are ways to simply remove it in post, and in your case, I wouldn't worry about it, as its supposed to be there.

 

[riverstone images]

In all digital slr's? Do you know if the Canon 50D has that option? I remove it now in Photomatix or simply edit it in Photoshop which can be a little tedious to say the least...

 

[Helen B]

It looks a bit more like axial chromatic aberration than lateral chromatic aberration. ACA can also be called purple fringing because it looks like a purple fringe on both sides of a bright detail. ACA decreases when you stop down. LCA generally looks like red and cyan lines that get worse as you get away from the centre of the image. It does not improve on stopping down.

Best,
Helen

 

[Dao]

Upon take a look at a review site, this is what the site said about the lens (Zeiss Sonnar T* 135mm f/1.8 ZA) you have.


Quote from Photozone.
"Longitudinal (Axial) Chromatic Aberrations (LoCA)
LoCAs (non-coinciding focal planes of the various colors), sometimes called "bokeh CAs", can be a visible in certain situations. This is slightly surprising regarding the 2 large ED elements in the lens design but it's obviously not enough for a true apochromatic correction (=fully color corrected). The problem isn't as pronounced in field conditions as in the 85mm f/1.4 league (across the different brands) though. "