Latest or all posts or last 15, 30, 90 or 180 days.
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$3049 $2399
SAVE $650

$3508 $2998
SAVE $510

$998 $848
SAVE $150

$3999 $2998
SAVE $1001

$2299 $1799
SAVE $500

$1597 $1297
SAVE $300

$80 $33
SAVE $46

$2299 $1799
SAVE $500

$1898 $1498
SAVE $400

$2799 $2299
SAVE $500

$2299 $1799
SAVE $500

$600 $400
SAVE $200

$240 $175
SAVE $65

$699 $499
SAVE $200

$400 $300
SAVE $100

$1599 $1398
SAVE $201

$2027 $1597
SAVE $430

$1699 $999
SAVE $700

$180 $100
SAVE $80

$1199 $1099
SAVE $100

$1199 $1099
SAVE $100

$999 $949
SAVE $50

$400 $300
SAVE $100

$1699 $999
SAVE $700

Upgrade the memory of your 2018 Mac mini up to 64GB

Sony A7R II: Dust Reduction / Anti-Dust Feature is Worthless

Get Sony A7R II mirrorless at B&H Photo.

Sony has not learned/improved in years: Sony A7R IV: Horrible Sensor Dust Problems.

Dust on the sensor is generally hard to see at f/5.6 or even f/8, because the rays are not yet highly collimited as they are at f/11 and f/16 (sharp shadow vs diffuse shadow). Of course, big chunk dust (a few hundred microns and larger) can be seen even at f/5.6. And often, detail obscure the spot. It is in areas like sky or other smooth uniform areas that dust becomes obvious.

To test for dust spots, take an image of any uniform surface, like the sky, at f/16. Defocus the lens if the subject has any detail.

As shown below, the Sony A7R II has a dust spot in the sky. I invoked the Sony A7R II anti-dust sensor-shake feature about eight times, holding the camera at various angles in hope that the spot would disappear. It vibrated impressively each time, to no avail, the vibration seemingly too low a frequency to work (ultrasonic would be better).

Taking the lens off, I could see a tiny white spot on the sensor (remember to reverse position from the picture, as with a mirror, up/down are flipped). I never like attempting to clean the sensor with wipes and such (particularly in the field!), and have not done so in years, so I tried something very simple: using a clean new microfiber cloth, I lightly dabbed at the spot just once, and off it came. Which shows that it was not stuck-on in the least, and that the anti-dust sensor cleaning of the A7R II is ineffective at commonplace types of dust spots.

Although this worked, I prefer to never have to make physical contact with the sensor. To that end, I use a large bulb blower—most of the time that works and gets most stuff off. The brand I have used is the Giotto blower—I have a smaller one for field work and a larger one for car or home. Used carefully, a vigorous burst of air can be directed at a very specific spot.

Dust Spot at f/11 with Sony A7R II
f11 @ 20.0 sec, ISO 100; 2015-09-29 18:59:01
Sony A7R II + 25mm

[low-res image for bot]
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ 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!

Save the tax, we pay you back, instantly!

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.