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...
$4499 $3499
SAVE $1000

$249 $219
SAVE $30

$1398 $898
SAVE $500

$1699 $1349
SAVE $350

$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

$1699 $1349
SAVE $350

$2798 $2498
SAVE $300

$1199 $1099
SAVE $100

OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.


√ No more slow and noisy hard drives!

Zeiss Batis 40mm f/2: Data Sheets Continue to Omit Optical Distortion, Showing Only Corrected Distortion

Get Zeiss Batis at B&H Photo.

I objected to this change in Zeiss data sheets some years back, and I reiterate it now: Zeiss data sheets no longer show uncorrected distortion (sin of omission) and show only a misleading corrected distortion graph (sin of irrelevance and contradiction vs MTF).

Zeiss is not alone in this misleading behavior. For example, Fujifilm X lenses require distortion correction (in Adobe Camera Raw) and the Leica Q has horrific barrel distortion which notable impaires MTF in outer zones. Other companies do it also.

  • Correcting distortion can lead to a substantial drop in micro contrast in some areas of the frame (for example, the Batis 18mm f/2.8 is visibly inferior in the corners and mid-zones when corrected). If distortion is shown corrected by software, then why is MTF shown without distortion correction? The claimed MTF is not achievable with distortion correction enabled.
  • I rarely correct distortion because I want the full optical performance. I’d like to know the actual optical behavior.
  • What is the point of showing a corrected distortion graph, other than perhaps to mislead? Once corrected, the distortion is so close to zero as to render the exercise meaningless.
Zeiss Batis 40mm f/2: corrected distortion at 1:30
Zeiss Batis lens family
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 Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.

Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
Organic Lab Tested Full Spectrum CBD

20% off every day with coupon code diglloyd20 at

Updated formula with more CBD!
100% organic non-GMO, no additives or preservatives, lab tested for purity and quality.
View all handpicked deals...

Pentax 8x42 S-Series SD WP Binoculars
$249 $219
SAVE $30

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.