Latest or all posts or last 15, 30, 90 or 180 days.
2024-03-19 02:11:17
Designed for the most demanding needs of photographers and videographers.
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$3399 $2999
SAVE $400

$2997 $2997
SAVE $click

$348 $248
SAVE $100

$999 $699
SAVE $300

$5999 $4399
SAVE $1600

$1049 $879
SAVE $170

$4499 $3499
SAVE $1000

$999 $849
SAVE $150

$999 $799
SAVE $200

$5999 $4399
SAVE $1600

$799 $699
SAVE $100

$1199 $899
SAVE $300

$1099 $899
SAVE $200

$348 $248
SAVE $100

$1602 $998
SAVE $604

$3399 $2999
SAVE $400

$3997 $3697
SAVE $300

$5999 $4399
SAVE $1600

$1397 $997
SAVE $400

Color Fringing in Blue Light: Gains From Correction with Canon 11-24mm f/4L (5DS R)

See my Canon wish list at B&H Photo.

See my review of the Canon 11-24mm f/4L including some very pretty Hoover Wilderness July snow images.

I just bought the about $2799 Canon 11-24mm f/4L, which is a lens I’ve been wanting for a year now, particularly for its 11mm to 14mm range, but also for its impressively low distortion.

Uncommon—indeed rare in my experience—is the presence of lateral chromatic aberration of the blue/yellow type, as is found in this example—usually blue halo effects are longitudinal chromatic aberration, which disappears quickly with stopping down. Not so with the Canon 11-24mm f/4L.

Since I often shoot in the mountains at dusk where blue light dominates, this correction example is particularly relevant to my work.

This is a must-read article for the Canon 11-24mm f/4L shooter—and it has a “happy ending”—one that in over 10 years of working with lenses is easily the best argument I’ve yet seen for the benefits of correcting lateral chromatic aberration (excepting the obvious godawful red/cyan cases of lenses I’d never shoot).

Color Fringing in Blue Light: Remarkable Gains From Correction (5DS R)

Includes full-size images up to 28 megapixels along with large corrected/uncorrected crops.

f9 @ 1/25 sec, ISO 100; 2016-12-28 09:11:01
Canon EOS 5DS R + Canon EF 11-24mm f/4L @ 15mm

[low-res image for bot]

CLICK TO VIEW: Recommended for Canon Shooters

Jason W writes:

Fascinating finding, my congratulations.

I was debating with a co-worker as to whether aliasing and noise increased as a result of the correction.

He thought noise appeared to increase with the correction in transition zones at high contrast boundaries.

We both thought the aliasing was increased due to the resolution boost. Perhaps this is expected behavior?

DIGLLOYD: always fun to find something like this. I actually processed the images 3 or 4 times, thinking I had made some kind of mistake—but I had not. It is highly unusual.

Correcting the blur definitely creates more aliasing, because the blur acts as a sort of anti-aliasing filter. In this case the aliasing is minor, with f/9 acting as a mild anti-aliasing filter via diffraction. Noise might also be more visible perhaps because pixel smearing is reduced.

It is very hard to expose in blue light, the camera often indicating near blowout in blatant disregard of the actual exposure reality in raw. For the image above, RawDigger shows a full 2+ stops underexposed, below. I didn’t dare expose more, given that the blue icy wood was mostly blue. It is incredibly frustrating not to have a true raw histogram and thus be left guessing at full ETTR exposure. I have been baffled for years at this this incredible blind spot of camera designers—it must be a Russian plot or something.

RawDigger histogram showing 2-stop underexposure

View all handpicked deals...

Nikon Z7 II Mirrorless Camera
$2997 $2997
SAVE $click

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | X.com/diglloyd
Copyright © 2022 diglloyd Inc, all rights reserved.