D700 and chromatic abberation

chrisgeary

chrisgeary

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I've made a recent return to Nikon and previously had a Canon 30D/5D and 70-200/4L, EF-S 60/2.8 amongst other lenses. I've never had CA with my Canon kit, or perhaps I never noticed it. Anyway, now I'm back with Nikon, I've been scrutinising my shots more than usual and noticed an alarming amount of CA in my images. Its easily correctable, but I thought a) the D700 corrected it itself and b) the lenses I have would be cleaner than this.

D700
24-70/2.8G
70-200/2.8G

See these 100% crop examples, the first is uncorrected, the second corrected with the settings you see in Lightroom.

http://www.chrisgearyphotography.com/stuff/24-70-uncorrected.jpg

http://www.chrisgearyphotography.com/stuff/24-70-corrected.jpg

Both are approx 150kb

Anyone else have to make these corrections in Lightroom?
I tested both lenses noted above and they both exhibit similar CA characteristics. I also have a 50/1.4G which needs correction.
 
That's interesting :)

To be fair, I'm sure you did have some CA with your Canon kit, but the two lenses you've cited are probably the best corrected out of the whole range!

I thought the top end Nikons all has CA correction in-camera, but TBH I don't know exactly what it does. I think it is a relatively simple system that takes sets of correction parameters and applies them fairly broadly and mildly, perhaps just based on focal length. But that's just a guess.

I don't think it is anything like as sophisticated as Canon's aberrations corrections, but they are only available in post processing. Their DPP Raw processor corrects for CA, distortion and vignetting according to custom profiles based on the individual lens, focal length, f/number and I think focusing distance also. One click and it's done.

I think it's fantastic feature, one of Canon's best kept secrets. I'm a little surprised (and disappointed) that it is not incoprorated in-camera with the new 7D, but it surely will be very soon. Nikon can't be far behind in this either. Panasonic GF1 fixes it in camera, as do quite a few top end compacts, eg Lumix LX3.
 
that's some nice lightroom settings.
do you have another similar photos, under similar conditions with your 5D? would be very interesting
 
Chris from the D700 brochure " the D700 incorporates a lateral chromatic aberration reduction function"

The D300 is the same, and is not a problem I have encountered, may be worth getting your D700 checked out.
 
The underlying raw data is not corrected. Correction happens at JPG level only.

If you shoot JPEG + raw you'll be able to see for yourself.

raw is still raw, and will therefore capture any lens aberrations verbatim.
 
puddleduck said:
The underlying raw data is not corrected. Correction happens at JPG level only.

If you shoot JPEG + raw you'll be able to see for yourself.

raw is still raw, and will therefore capture any lens aberrations verbatim.
Click to expand...

Do you know how it works? What correction data does it work from? Is it any good?
 
chrisgeary said:
I've made a recent return to Nikon and previously had a Canon 30D/5D and 70-200/4L, EF-S 60/2.8 amongst other lenses. I've never had CA with my Canon kit, or perhaps I never noticed it. Anyway, now I'm back with Nikon, I've been scrutinising my shots more than usual and noticed an alarming amount of CA in my images. Its easily correctable, but I thought a) the D700 corrected it itself and b) the lenses I have would be cleaner than this.

D700
24-70/2.8G
70-200/2.8G

See these 100% crop examples, the first is uncorrected, the second corrected with the settings you see in Lightroom.

http://www.chrisgearyphotography.com/stuff/24-70-uncorrected.jpg

http://www.chrisgearyphotography.com/stuff/24-70-corrected.jpg

Both are approx 150kb

Anyone else have to make these corrections in Lightroom?
I tested both lenses noted above and they both exhibit similar CA characteristics. I also have a 50/1.4G which needs correction.
Click to expand...

A test I'd run - print that shot at A3 and see if it's an issue. Unless you'd pointed it out I doubt I'd have noticed.
 
puddleduck said:
The underlying raw data is not corrected. Correction happens at JPG level only.

If you shoot JPEG + raw you'll be able to see for yourself.

raw is still raw, and will therefore capture any lens aberrations verbatim.
Click to expand...

I think CaptureNX2 applies the correction to the raw images automatically, never been an issue with my D300, but I use CaptureNX2 to convert my raw files.
 
Martyn... said:
I think CaptureNX2 applies the correction to the raw images automatically, never been an issue with my D300, but I use CaptureNX2 to convert my raw files.
Click to expand...

I've never noticed an issue with RAW files directly into Light Room using the body.lens combinations mentioned by the OP. One or two of my older lenses maybe, but never that combination

Hugh
 
Martyn... said:
I think CaptureNX2 applies the correction to the raw images automatically, never been an issue with my D300, but I use CaptureNX2 to convert my raw files.
Click to expand...

Yes, the correction data is embedded as a separate data field which NX can understand.

But the raw data from the sensor isn't corrected and only Nikon understands the propriety correction tags.

Personally I'd rather have a bit of CA than have to endure Capture NX - lifes too damn short :lol:
 
Yes, full depth of field. I was shooting at 70cm distance at a focal length of 70mm. f/22 was required for full front to back sharpness. The same CA can be observed at any aperture opening.
 
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