Latest or all posts or last 15, 30, 90 or 180 days.
Upgrade the memory of your 2020 iMac up to 128GB
Today’s Deal Zone Items... Handpicked deals...
$280 $230
SAVE $50

$100 $100
SAVE $click

$4499 $3499
SAVE $1000

$1398 $898
SAVE $500

$649 $449
SAVE $200

$7595 $5995
SAVE $1600

$799 $499
SAVE $300

$2598 $2398
SAVE $200

$1498 $1398
SAVE $100

$249 $219
SAVE $30

$1699 $1299
SAVE $400

$21999 $19999
SAVE $2000

$8399 $7599
SAVE $800

$1149 $799
SAVE $350

$260 $180
SAVE $80

$4998 $3998
SAVE $1000

$569 $519
SAVE $50

$899 $799
SAVE $100

$2347 $1997
SAVE $350

$883 $633
SAVE $250

$1299 $949
SAVE $350

$1636 $1036
SAVE $600

$1699 $1299
SAVE $400

$1199 $1099
SAVE $100

Nikon NIKKOR Z 14-30mm f/4 S Distortion at 14mm, 19.5mm, 30mm

Get Nikon NIKKOR Z 11-30mm f/4S and Nikon NIKKOR Z lenses at B&H Photo.

Requiring software distortion correction guarantees that the final image can never achieve full sensor resolution in at least some areas of the frame, damaging sharpness and micro contrast in the critical central area for pincushion distortion, and damaging it in the outer zones for barrel distortion. Is that the “ultimate in optical image quality”, as per Nikon’s brochure?

When the distortion is strong enough, it isn’t even viable to find a raw conversion workflow that can (somehow) disable the EXIF flag that requires distortion correction; it’s just too awful. Such as at 14mm, below.

The page looks at optical distortion for the Nikon NIKKOR Z 14-30mm f/4 S at 14mm, 19.5mm, and 30mm, showing the uncorrected and corrected image from distortion correction, along with analysis of the loss in sharpness and micro contrast.

In diglloyd Mirrorless:

Nikon NIKKOR Z 14-30mm f/4 S Distortion

This performance of the 14-30mm f/4 along with that of all the other Nikon NIKKOR Z lenses shows that Nikon has made an intentional systematic tradeoff in optical design for excellence in most areas (particularly color correction) by sacrificing the most important area of all for many uses: sharpness. All while claiming optical excellence including near-zero distortion. From Nikon’s PDF lens brochure “NIKKOR-Z-Brochure.pdf”, this non-sequitur:

The ultimate in optical image quality... Less Distortion
Even at their widest apertures, NIKKOR Z lenses show virtually no distortion...

I don’t have an issue with a company making design decisions. But I find outright falsehoods unacceptable.

Contrast that to the Canon RF 50mm f/1.2L, Canon RF 85mm f/1.2L and the Canon RF 28-70mm f/2L designs, which have extremely low optical distortion along with ultra high performance—clearly pro-oriented. The two strategies are far apart; Canon’s design approach is forward-looking and results in lenses of higher cost but of long-term satisfaction, but Nikon seemingly is not targeting professional use.

Distortion (uncorrected) at 14mm for Nikon NIKKOR Z 14-30mm f/4 S
f5.6 @ 1/5 sec, ISO 31; 2019-06-19 20:27:10
NIKON Z7 + Nikon NIKKOR Z 14-30mm f/4 S @ 14mm RAW: LACA corrected

[low-res image for bot]
OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available

Great for travel or for desktop!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.


√ No more slow and noisy hard drives!
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.

Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!

Best Deals, Updated Weekly
View all handpicked deals...

SanDisk 256GB Extreme PRO UHS-I SDXC Memory Card
$100 $100
SAVE $click

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.