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LA-EA3 - two negative discoveries

a6k

By a6k,
in Adapters & Speedboosters

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a6k Explorer

a6k

Posted
Posted

I am using a rented a7R II and SAL70400 with the adapter from A to E. 

 

On the a7R II it works pretty well but does not support DMF focus mode. I can live with that but not very happily.

 

Today I tried the lens + adapter on my a6000 and it tried to autofocus but really could not do it. I tried both full auto and limited auto and it simply hunted.

 

Since I had never read about that I decided to tell all of you what I experienced.

 

FYI only.

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Baiwei Rookie

Baiwei

Posted
Posted

Yep SONY blocked DMF and eye AF on lenses with adapters.

 

Metabones EF-NEX IV adapter, however, gives you DMF and eye af with Canon lenses! Only 4rth version and above. 

 

All these adapters work fine only on A7R2, A7-2, A6300 and A6500. Other can use only LA-EA4 to get autofocus on A lenses... 

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  • 3 weeks later...
Username Mentor

Username

Posted
Posted

I am using a rented a7R II and SAL70400 with the adapter from A to E. 

 

On the a7R II it works pretty well but does not support DMF focus mode.

I can live with that but not very happily.

 

Today I tried the lens + adapter on my a6000 and it tried to autofocus but really

could not do it. I tried both full auto and limited auto and it simply hunted.

 

Since I had never read about that I decided to tell all of you what I experienced.

 

FYI only.

   

Yep.    

   

I wouldn't quite call them "discoveries", cuz those are 

the behaviors Sony specifies for those combinations.  

   

Frinstintz, I use the LAEA3 for all my ancient A-mount

lenses, and only the functions that Sony specifies are 

operational. But it suits my needs so I bought it. 

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  • 4 months later...
Lefty Enthusiast

Lefty

Posted
Posted

LA-EA3 works better on a6500 than on a7ii for me or Nex5t for that matter. 425 PDAF points on the a6500 sensor vs 117 on the a7ii and 99 on the Nex make a difference. LA-EA2 or 4 are required with all screw drive A mount glass regardless of body.

 

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    • Pieter
      Blurry images on Sony 70-350

      By Pieter · Posted

      I've been using this lens extensively without any sharpness issues. At long focal lengths, you'll have to factor in the need for a faster shutter speed (< 1/500-ish at 350mm) and other factors like atmospheric distortion, fog/dust haze, etc. All these factors contribute to a deterioration of image quality at longer focal lengths.
    • Cameratose
      Blurry images on Sony 70-350

      By Cameratose · Posted

      That's supposed to be a pretty good APS-C lens. Can you try it on a different camera just for the heck of it? Friend? Camera shop? The lens is noted for sharpness, so if you're having as much trouble as you say, you may want to look into a replacement or repair. 
    • broz_tito
      Blurry images on Sony 70-350

      By broz_tito · Posted

      Hi everyone, I’m reaching out to the community because I’m facing a persistent image quality issue with my Sony 70–350mm f/4.5–6.3 G OSS lens, and I’d like to know if this is normal behavior or if my copy is defective. Problem description: I’ve extensively compared the 70–350mm G OSS with my Sony 18–135mm f/3.5–5.6 OSS, using a Sony A6700, under controlled conditions: • Identical lighting and background • Same subject and position (LEGO figure, consistent framing) • Tripod or steady support • Manual focus or AF with center point • Same shutter speed (e.g., 1/200s), similar ISO (ISO 4000–6400), RAW + JPEG • OIS turned on (and also tested with OIS off) My observations: • At 135mm, the 70–350mm G OSS delivers softer, flatter images than the 18–135mm, even when stopped down. • At 350mm, the sharpness drops significantly – the center is soft, and textures (like LEGO tiles or fabric) appear blurred or smudged. • Contrast and micro-detail are noticeably inferior across all focal lengths. • The 18–135mm at 135mm (even cropped) retains better edge sharpness and detail definition. • Both JPEG and RAW files confirm the issue – this is not just JPEG processing or noise reduction. Question to the community: • Have others experienced similar softness with the 70–350mm? • Is it possible I have a decentered or optically misaligned copy? • Is there a known issue with OSS introducing softness at long focal lengths? I wanted to love this lens due to the range and portability, but currently it’s unusable for anything where image quality matters. I’m considering returning or sending it for service. Thanks in advance for any feedback or comparison results you can share.  

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