Latest or all posts or last 15, 30, 90 or 180 days.
Memory Deals, Thunderbolt Drives, Performance Upgrades, and More
64GB for 2019 iMac 5K

$550 savings vs Apple!
64GB costs *less* than 32GB Apple!

Sony G Master 85mm f/1.4 Focus Accuracy on Sony A7R II with Firmware 3.1

Get Sony G Master Lens at B&H Photo.

Sony 85mm f/1.4 GM

A few days ago, I showed focus error with the Sony 85mm f/1.4 GM on the Sony A7R II. That was with firmware 3.0, with version 3.1 recommended with the 85/1.4 GM.

But it seems the firmware version has nothing to do with problematic performance.

Using the Sony A7R II with the very latest firmware (version 3.1), I put focusing to the test under controlled conditions in which every effort was made to help the camera succeed.

Focus Accuracy at f/1.4 and f/4, Controlled Conditions (Dolls)

Shot at two different distances and at both f/1.4 and f/4 to confirm the findings.

I prefer my images as sharp as the lens can deliver, which is why I do all my evaluation work with manual focus whenever feasible, which is almost always.

So we can forgive some error at f/1.4 (but on mirrorless?!), but what about f/4 too?

Comparing autofocus and manual focus


Data transfer speeds up to 2800MB/s
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 11 hours unless noted. Certain deals may last longer.
$3097 SAVE $200 = 6.0% Nikon D850 DSLR in Cameras: DSLR
$1797 SAVE $200 = 10.0% Pentax K-1 Mark II DSLR in Cameras: DSLR
$998 SAVE $400 = 28.0% Sony a7 II Mirrorless in Cameras: Mirrorless
$1798 SAVE $200 = 10.0% Sony a7R II Mirrorless in Cameras: Mirrorless
$2798 SAVE $400 = 12.0% Sony a7R III Mirrorless in Cameras: Mirrorless
$3998 SAVE $500 = 11.0% Sony a9 Mirrorless in Cameras: Mirrorless

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.