Purple Fringing in New Nikon 20mm f/1.8G

<p>Is purple fringing common in the Nikon 20 f/1.8G? I read all the reviews and they all showed CA to be low.<br>

<img src="/photo/18335231&size=lg" alt="" /></p>

<p>Why is putting a picture on here so difficult?<br /> Here is a link: http://www.photo.net/photo/18335231<br /> It was shot at f/7.1, ISO 100, 1/2 sec. using Lee .6 soft GND</p>

<p>I must add that I was not able to remove it all in Lightroom.</p>

<p>[[Why is putting a picture on here so difficult?]<br>

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It appears that you attempted to reference a web page, not an image file, in your "insert image" step. An image file that displays in-browser from your uploads, would end in JPG. If you right-clicked and picked "copy link address" that link is not to the image, but to the web page that shows the larger image. Check the copied address before adding it to the "insert image" dialog box. <br>

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<p><img src="http://d6d2h4gfvy8t8.cloudfront.net/18335231-lg.jpg" alt="" /></p>

<p>Thank You Rob.</p>

 

<p>It looks like the camera body used is a D600, i.e. 24MP FX. If the attached image is showing the corner of a frame, some fringing is inevitable since 20mm is very wide on FX. I don't have the 20mm/f1.8 AF-S, but my 17-35mm/f2.8 AF-S is showing that type of fringing towards the corners on its wide end.</p>

<p>A crop closer to the center:<br>

<img src="http://d6d2h4gfvy8t8.cloudfront.net/18335248-lg.jpg" alt="" width="1096" height="1072" /></p>

<p>A minute spend in ACR (photoshop CC): </p>

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<p>And the other one:</p>

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<p>No doubt I am a little confused on how they test these lenses. My 18-35mmG lens was much better than this, wide open and in the corners. Yet, the 20mm f/1.8 rates much better at controlling CA? </p>

<p>Actually, according to photozone.de, the CA for the 20 and the 18-35 (at 21mm) stopped down to the same level as the images shown here should be about the same. Wide open, the performance should be better for the 20. DxOmark pretty much supports the photozone results.</p>

<p>Dieter, I don't have Photoshop. I do have Elements and Lightroom. Lightrooms CA feature does not work near as well. Not to mention it is one more step in PP that I would rather not have to do. </p>

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<p>Lightrooms CA feature does not work near as well.</p>

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<p>Just did the same correction in LR (CC), as easy and in ACR (not surprisingly, as it is my understanding that the underlying RAW converter is identical).</p>

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<p>Not to mention it is one more step in PP that I would rather not have to do.</p>

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<p>When shooting RAW, with lens correction enabled and not using Nikon software, CA correction is a just something one needs to do quite often. Most of the time, the automatic correction based on the profiles works quite well though.</p>

<p>Are you getting the same purple fringing when not using the Lee GND?</p>

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<p>Are you getting the same purple fringing when not using the Lee GND?</p>

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<p>I was wondering the same thing.</p>

<p>Isn`t it a bit of sensor blooming, too? I tend to think that it`s not only a lens issue, but also a sensor behavior. And the image looks overexposed (it makes the effect even more pronounced).<br /> It is quite common with extreme contrast subjects like yours, thin dark branches against a bright washed sky. I can get this effect with almost every lens I have.</p>

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<p>Isn`t it a bit of sensor blooming, too? I tend to think that it`s not only a lens issue, but also a sensor behavior.</p>

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<p>The fact that it is magenta on one side and green on the other points to lateral CA. Sensor blooming would show pink all around (and only around highlights), wouldn't it?</p>

<p>Dieter I used the auto correction and it did not work near as well as your corrected images. The CA auto correction I used is right beside the distortion and vignetting correction.</p>

<p>Ronald I will take some shots and see, same ugly day as yesterday.</p>

<p>Jose, it does look a little over-exposed but not enough to create highlight blinks on the D600 LCD. And I have photographed the same scenes many times over the years with 12-24mm f/4 and 18-35mmG. It is time for the chorus frog breeding and nothing shows that better than a dreary January day.</p>

<p>Here is the full photo:<br /><img src="http://d6d2h4gfvy8t8.cloudfront.net/18335249-lg.jpg" alt="" width="1500" height="1001" /></p>

<p>I have the 20mm f1.8G and rarely have CA problems. When I do see some, it is in the corners.</p>

<p>Kent in SD</p>

<p>Derek, sky behind dark branch is tough. That's where I see purple fringing with wides an zooms, and I have trouble getting rid of all of it. </p>

<p>Yours is a nice shot, and even in the full image I can see the purple hue in the upper left corner.</p>

<p>While I do not own that lens, I do own quite a few of the G series lenses and have never had any purple fringing from any of them. </p>

 

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<p >Jose Angel <img title="Hero" src="/v3graphics/member-status-icons/hero.gif" alt="" />, Jan 23, 2017; 01:38 p.m.</p>

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<p>Isn`t it a bit of sensor blooming, too? I tend to think that it`s not only a lens issue, but also a sensor behavior. And the image looks overexposed (it makes the effect even more pronounced).<br />It is quite common with extreme contrast subjects like yours, thin dark branches against a bright washed sky. I can get this effect with almost every lens I have.</p>

 

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<p>I completely agree with Jose. Those were my thoughts exactly. </p>

 

<p>I have the older version of the 20mm lens. My copy of the af-d 20mm f/2.8 has been a trouble. The af-d is supposed to be a lesser lens compared to the 20G. At f/7 af-d is still reasonably good. When testing I have shot a fair share of similar scenes.<br>

For the new af-s 20/1.8 G I would expect better behaviour around f/7. <br>

SW corrections may help. In Nikon world I have got help from axial CA correction in Capture NX-d. However, too much of the axial CA correction and I start losing overall image colors. <br>

What happens to the fringing if you are changing the focus distance?</p>

<p>See! You should have spent your handful of dimes on a NIKKOR-UD 20mm!!!</p>

<p>I haven't seen color fringing with the 20/1.8 but I don't usually overexpose the sky in the background.</p>

<p>Ilkka, I visited your flickr page and saw quite a few pics with over-exposed skies. This one in particular is quite over-exposed. Next time you have a sky like that in your area shoot some tree branches against it with your 20.1.8. and let me know how it fares.</p>

<p>I just got this lens and debating on whether to send it back or keep it. I was really wanting to know if this was a common problem with the lens or maybe I got a dud. I have never got that kind of fringing with any other lens. However, I did figure out how to fix it in Lightroom, you have to do it manually. I think I did a -4 on the purple slider. The build of the lens is quite cheap, but It did fairly well on a sunset last night. </p>