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Distortion in my picture.
May 28, 2022 16:31:14   #
vova
 
I’m new to photography and i would like to ask you for your help.I have a problem, with my Canon 90d or with the lens I use . Tamron 16-300mm f/3.5-6.3. When I shut an 16mm. I see multiple colors around the object like rainbow but when I shut an 18-300 I have no problems.Thanks you for your help.


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May 28, 2022 16:41:30   #
rook2c4 Loc: Philadelphia, PA USA
 
That's typically the downside of such lenses with a very broad focal range - they can do everything, but not everything very well.

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May 28, 2022 16:46:42   #
fredpnm Loc: Corrales, NM
 
It's called Chromatic Aberration and many post-processing software, such as Lightroom and Photoshop, can correct for this condition. As has already been noted, lenses such as the Tamron 16-300 are famous for having this issue - as you will discover lenses with this wide range (16-300) are best avoided.

What software are you using (or plan to use) to process your photos afterward?

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May 28, 2022 17:34:59   #
vova
 
Thanks for quick response and very helpful explanation.

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May 29, 2022 10:21:39   #
sippyjug104 Loc: Missouri
 
Chromatic Aberration is caused by the rays of light bending as they pass through the aperture of the lens. It is a physical characteristic of the lens and aperture.

If you want to try using this lens at 16mm, shoot with a more open aperture (f/3.5 or one-stop more) and the effect should be less noticeable. Even the best lenses lose resolution and are subject to chromatic aberration when they stop down the aperture (think of it in the way that a garden hose nozzle turns from a solid flow to that of a spray when it is closed down).

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May 29, 2022 15:00:59   #
Alphabravo2020
 
Sometimes you pay extra 💲 for these lens effects. As an example, chromatic aberration from Nikon's legendary 50mm f1.2ai could be mistaken for a DragonBallZ powerup (if you get that reference 😲)

CA is especially prominent under backlighting and at close angles to the sun as you can see from your first example and mine. Under direct frontal light (second shot) the effect mostly goes away.

Shooting wide open increases CA since light comes through the lens every which way. Stopping down will reduce it up to a point.

When the CA is this prominent, LR can't do much for you. Better to choose a different lens or or lighting condition that doesn't send diffracted light directly down the barrel of your lens.







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May 29, 2022 17:39:25   #
fantom Loc: Colorado
 
vova wrote:
I’m new to photography and i would like to ask you for your help.I have a problem, with my Canon 90d or with the lens I use . Tamron 16-300mm f/3.5-6.3. When I shut an 16mm. I see multiple colors around the object like rainbow but when I shut an 18-300 I have no problems.Thanks you for your help.


That is chromatic aberration. Lightroom corrects for this with one click in the Lens Correction Panel. It does a good job and generally removes all of the CA.

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May 29, 2022 22:24:56   #
vova
 
Thanks to everyone for the response and explanation.

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