Latest or all posts or last 15, 30, 90 or 180 days.
Upgrade the memory of your 2018 Mac mini up to 64GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$1398 $998
SAVE $400

$1798 $1198
SAVE $600

$151 $151
SAVE $click

$2299 $2069
SAVE $230

$240 $175
SAVE $65

$240 $175
SAVE $65

$1399 $799
SAVE $600

$2198 $1998
SAVE $200

$2299 $1799
SAVE $500

$2000 $1500
SAVE $500

$898 $798
SAVE $100

$1799 $1699
SAVE $100

$1699 $1499
SAVE $200

$999 $799
SAVE $200

$1798 $1198
SAVE $600

$1997 $1797
SAVE $200

$3399 $2799
SAVE $600

$33 $33
SAVE $click

$699 $699
SAVE $click

$400 $300
SAVE $100

$1699 $949
SAVE $750

$1199 $1099
SAVE $100

$1199 $1099
SAVE $100

$999 $949
SAVE $50

$1699 $949
SAVE $750

OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!

Sony FE 16-35mm f/4 ZA OSS Vario-Tessar: Aperture Series, Yellow Blue Bike

Get Sony FE 16-35mm f/4 OSS at B&H Photo.

The subject matter might seem mundane, but the results are distinctively not so.

I shot a variety of other comparisons and series today, but my work is halted until I determine what is causing a pronounced focus shift: optical, or is it a lens or camera firmware bug or just plain bug?

These two aperture series at 21mm an 25mm duplicate the problem and another at 35mm (not published) also does. It is a serious behavioral problem, and it has to be tracked down before I can proceed further with the 16-35/f4. Possibly it could involve the Sony A7R firmware version (cameras shipped right now are arriving with version 1.01), so the next step is to move to version 1.10, which is not so straightforward.

Update: I ran a controlled close-distance test at 35mm using the A7R with firmware update to version 1.1. I cannot reproduce the issue in that one test. It’s Gobble Day today, but by tomorrow I hope to have done some more shooting with firmware 1.1 to see if the problem has been cured; my working theory is a camera bug in version 1.01 firmware.

Update 2: well, another series with firmware 1.1 at 24mm shows clear focus shift. To be published after the turkey has been gobbled (I eat late).

Update 3: reproduced at 24mm with firmware 1.1 on a scene mimicking the 25mm scene below. To be published. Clearly there is no firmware fix.

Sony A7R + Sony Vario-Tessar T* FE 16-35mm f/4 ZA OSS @ 21mm @ f/4
Sony A7R + Sony Vario-Tessar T* FE 16-35mm f/4 ZA OSS @ 25mm @ f/5.6

OWC Envoy Pro Elektron

Ultra-high performance across entire capacity, outperforms the competition.

Tiny, bus-powered, rugged, compact!


√ No more slow and noisy hard drives!

Deals Updated Daily at B&H Photo
View all handpicked deals...

Sony Alpha a7R II Mirrorless Digital Camera (Body Only)
$1798 $1198
SAVE $600

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2021 diglloyd Inc, all rights reserved.