Chromatic aberration in Nikon 18-140mm - is this common?
Mar 30, 2018 20:21:22 #
I had read so many very good comments about the subject lens that I was surprised to see the dreaded CA in my first few pics. And not in the corners, just off to the side, @ 18mm.
Is this a known problem?
Bill
Is this a known problem?
Bill
Mar 30, 2018 21:29:28 #
WJShaheen wrote:
I had read so many very good comments about the subject lens that I was surprised to see the dreaded CA in my first few pics. And not in the corners, just off to the side, @ 18mm.
Is this a known problem?
Bill
Is this a known problem?
Bill
Not in mine. Which camera are you using?
Mar 30, 2018 22:06:52 #
Mar 30, 2018 22:09:16 #
More info. I was using 3 other lenses and never had this problem. I wanted the 18-140 for its reputed sharpness throughout the focal range.
Mar 31, 2018 01:05:55 #
Mar 31, 2018 07:53:16 #
What I've since learned: As the saying goes, you can't make a silk purse out of a sow's ear. The original photo was taken of a sunset with several saguaro in the foreground, which presented strong contrast images, to say the least. It was in my opinion asking too much of the lens. Image (1) is the original (opened in View-NXi) and exported to tif.
Image (2) is after strong post processing, raising the black levels. (3) is with a CA adjustment applied in PP.
(1) http://www.pbase.com/wjshaheen/image/167238382/large
(2) http://www.pbase.com/wjshaheen/image/167238383/large
(3) http://www.pbase.com/wjshaheen/image/167238384/large
A perfect candidate for employing HDR imaging.
Thanks,
Bill
Image (2) is after strong post processing, raising the black levels. (3) is with a CA adjustment applied in PP.
(1) http://www.pbase.com/wjshaheen/image/167238382/large
(2) http://www.pbase.com/wjshaheen/image/167238383/large
(3) http://www.pbase.com/wjshaheen/image/167238384/large
A perfect candidate for employing HDR imaging.
Thanks,
Bill
Mar 31, 2018 10:12:36 #
You should check with Nikon. Chromatic aberrations are common with digital gear but I have not heard much about chromatic aberrations with the lens you are using now.
Mar 31, 2018 10:27:18 #
camerapapi wrote:
You should check with Nikon. Chromatic aberrations are common with digital gear but I have not heard much about chromatic aberrations with the lens you are using now.
I thought I'd live with the lens for a couple weeks under more normal (and experienced) shooting situations and decide where to go.
And, your suggestion is certainly an option.
Thank you,
Bill
Mar 31, 2018 20:21:45 #
WJShaheen wrote:
I thought I'd live with the lens for a couple weeks under more normal (and experienced) shooting situations and decide where to go.
And, your suggestion is certainly an option.
Thank you,
Bill
And, your suggestion is certainly an option.
Thank you,
Bill
Just a thought. Some year ago, my wife gave me a D7000 - 18-200 mm lens. Buncha shots exhibited some CA. Like you, I was surprised.
A while later, I was looking at my camera's menu settings. When I opened the AF Fine Tune Menu, I discovered that the camera had a +5 adjustment. I had NOT done this. Possibly, someone at the factory had been testing the camera and forgot to re-do the setting.
I set the AF Fine Tune adjustment back to zero. Took a few shots and saw two things. The focus was MUCH better and the CA was gone.
Give it a look-see.
Mar 31, 2018 20:34:56 #
JaiGieEse wrote:
Just a thought. Some year ago, my wife gave me a D... (show quote)
Oh, I gotta try that. I've been meaning to get into checking the fine tuning and just hadn't gotten around to it. Thank you.
Mar 31, 2018 20:40:46 #
WJShaheen wrote:
Oh, I gotta try that. I've been meaning to get into checking the fine tuning and just hadn't gotten around to it. Thank you.
Just checked and my AF-tune is at zero. Thanks.
Mar 31, 2018 20:47:46 #
https://www.imaging-resource.com/lenses/nikon/18-140mm-f3.5-5.6g-ed-af-s-dx-vr-nikkor/review/
They report that CA is higher than usual when compared to other offerings from Nikon.
They report that CA is higher than usual when compared to other offerings from Nikon.
Mar 31, 2018 21:02:23 #
WJShaheen wrote:
What I've since learned: As the saying goes, you c... (show quote)
CA rears it’s ugly head about the time we think we have some pretty good shots, as you do here. It’s aggravating, and not uncommon, regardless the lens you’re using. I should do some reading to see how to avoid it while shooting, but it doesn’t happen that often and Lightroom typically eliminates it. I think the second image displays some rather mild CA. I’ve seen much worse, in my own work. It seems you remedied the situation. I wouldn’t worry about that lens so much. I’d bet it has given you some images you’re proud of.
Incidentally, I like that foreground in silhouette against that sunset!
Good luck!
Mar 31, 2018 21:34:07 #
brucewells wrote:
CA rears it’s ugly head about the time we think we... (show quote)
Thank you, Bruce. Yes, I've since played around with it under more normal conditions. By the way, with a Kenko 1.4x TC the images are excellent.
Appreciate your comments.
Mar 31, 2018 21:36:00 #
LoneRangeFinder wrote:
https://www.imaging-resource.com/lenses/nikon/18-140mm-f3.5-5.6g-ed-af-s-dx-vr-nikkor/review/
They report that CA is higher than usual when compared to other offerings from Nikon.
They report that CA is higher than usual when compared to other offerings from Nikon.
Yes, DxO had a similar sounding report. They felt that the sharpness throughout the range was worth the slight CA in the corners at 18mm.
Thanks.
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.