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AF System unavailable with E-mount lenses ?

Antonio Correia

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Joined
Feb 2, 2019
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387
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Setúbal, Portugal
AF System is in folder 1 - page 6 second from bottom in my Sony A7 III
It is unavailable because the lens I attach is E-mount.
However, I would like to change this setting and alternate between Phase Detection AF and Contrast AF, just to try and see what I get.
I may be wrong but the Phase Detection AF may be responsable for many of my focus failures. As I told you... I may be wrong !
Thank you ! :)
Please click here to go to the user's manual

i-qpJGmTm-X2.png
 

bdbits

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Bob
The included text from the manual makes it pretty clear this is only for use with the LA-EA1/EA3 adapters.

From my understanding, the A7R3 already uses a combination of both. PDAF is used for initial acquisition, and CDAF is used as a secondary check or in low light where I guess PDAF has issues. As someone who used Sony bodies when they were CDAF only, let me just say you do not want to eliminate PDAF. CD-only AF was responsible for many complaints about mirrorless AF back then, and is also very slow relative to PDAF.
 

JonathanF2

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Aug 16, 2014
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Los Angeles, USA
CD-only AF was responsible for many complaints about mirrorless AF back then, and is also very slow relative to PDAF.
Actually CDAF was fairly fast with Panasonic mirrorless bodies and Olympus eventually caught up with the E-M5 mk.I. Unfortunately M43 has stagnated a bit in regards to their continuous auto focus, with Panasonic adopting wobbly DFD and Olympus not relying on true OSPDAF on all their cameras.
 

Antonio Correia

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Joined
Feb 2, 2019
Messages
387
Location
Setúbal, Portugal
  • Thread Starter Thread Starter
  • #4
Thank you Bob and Jonathan for your comments.
@ Bob - Yes Bob I read the text before posting and I was aware of the included text. But sometimes, there are ways to turn around and make things better like little tips.
@ Jonathan - The way Olympus focuses is much more comfortable than Sony's and it returns good results and I get

Indeed I am a bit pixel peep and what drove me to Sony is the quality of the images, mainly when using GM lenses which make a real difference.
To colorize the thread I post one image with the 24 GM

ILCE-7M3    FE 24mm F1.4 GM    24mm    f/6.3    1/40s    ISO 400
 

Ziggy99

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Joined
Jan 25, 2019
Messages
454
Location
Australia
Actually CDAF was fairly fast with Panasonic mirrorless bodies and Olympus eventually caught up with the E-M5 mk.I. Unfortunately M43 has stagnated a bit in regards to their continuous auto focus, with Panasonic adopting wobbly DFD and Olympus not relying on true OSPDAF on all their cameras.
Yes DfD eliminates the trial and error of CDAF (with Panasonic lenses). You're left with the fine tuning moves.
 

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