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Which adapter to use? EA3 or 4?

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tzk1810 View Drop Down
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Post Options Post Options   Quote tzk1810 Quote  Post ReplyReply Direct Link To This Post Topic: Which adapter to use? EA3 or 4?
    Posted: 04 August 2020 at 06:52
Hey guys, I'm new in this forum, this is my first post.

I got a question before upgrading to E mount FF.

Currently, I'm using an a6000 + EA4 with SAL70-400G first gen for train, plane and wildlife spotting. It works just like an A65 and I'm thinking to upgrade and buy an A7iii during Xmas sales.

So, will LA-EA3 with upgraded firmware A7iii works better with 70400G? or should I continue using the EA4? Because I've seen some article talking about the new firmware can unlock AF functions on 3rd gen FF body, but I haven't got time to try out at shops due to the pandemic. How well does it perform? Especially the AF tracking during highspeed burst shots. Thanks
 



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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2020 at 07:36
Welcome to Dyxum TJ. If you use LA-EA4, the AF comes from the LA-EA4's (limited number of) AF points and there will be no benefit from the on-sensor AF points of the A7iii. You would then be better off with LA-EA3. To what extent that can match the performance of a native (FE) telezoom like the 100-400 remains to be seen, but it will certainly be better than what you are used to now. I found AF pretty snappy on A7Rii using the 70-400 with LA-EA3, but traded the 70-400 when I got A7iii so cannot try the combo.
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wetapunga View Drop Down
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Post Options Post Options   Quote wetapunga Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2020 at 07:36
By all accounts the LA-EA3 is the better option on 3rd generation models and with SSM lenses. It lets you use the focus system of the camera, rather than the very dated AF-SLT module in the LA-EA4.
a77ii- and some Sony/Minolta A-mount lenses.
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Post Options Post Options   Quote minolta_mutley Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2020 at 11:15
My opinion is more or less a confirmation of what Wetapunga has written.
I'm using my 300mmf2.8 ssm Sony 1st gen with the LA-EA3 exclusively - LA-EA4 is needed for screw driven lenses, and the AF-focus system dates from the A55-series. That's rather old.
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2020 at 12:13
Originally posted by tzk1810 tzk1810 wrote:

Especially the AF tracking during highspeed burst shots. Thanks

There is no AF during bursts at higher than LO frame rate with any of the Sony adapters on non-A9 models. With higher frame rates the focus will lock at the beginning of the burst. Many don't notice this, and believe they get focus tracking. Some complain about poor tracking performance.

With the A9 cameras you only get 8 or 10 FPS tracking during bursts when using the fully electronic shutter with an updated LA-EA3. Original SSM/SAM lenses and all third-party AF motor lenses are limited to 8 FPS on the A9 models. The LO frame rate on the A9's electronic shutter is 5 FPS. You can use that with all the LA-EA adapters on that camera. The LO frame rate is 2.5 or 3 FPS otherwise.

The only other way to get tracking in bursts at higher than LO frame rate with adapted lenses is to use a third-party EF adapter that emulates a native lens instead of emulating the Sony adapters.

Adapted lenses often acquire focus lock faster than native lenses in AF-S. AF-S with native lenses on the A7III is often pretty slow. Real-time Eye AF works with the LA-EA3 on the A7III.

The A65 focuses better than the LA-EA4 especially with the updated SSM/SAM lenses. The LA-EA4 AF is not comparable to the oldest, lowest end SLT bodies.

Edited by QuietOC - 04 August 2020 at 17:18
Sony A7III NEX-5T HVL-F45RM LA-EA3 LA-EA4 MB-IV MC-11 EF-E II MD-NEX KR-NEX DA-NEX
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Post Options Post Options   Quote Zachoff1 Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2020 at 17:15
I've been using the SAL 70-200mm f/2,8 with the LA-EA3 with very good success in high-speed mode. AF-C. It is a much better way to go than the LA-EA4. I have both. On the A7II, it's a push, but on the a7III, night and day difference. I do have an older SAL 70-400 and I believe it would work fine as well. I will give it a try and let you know. I use the LA-EA4 for the older screw focus SAL lenses like the 300mm f/2.8 Tamron SP and Zeiss 135mm f/1.8. They work well on the a7III but you limit your number of focusing points like everyone has been saying.   
 



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tzk1810 View Drop Down
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Post Options Post Options   Quote tzk1810 Quote  Post ReplyReply Direct Link To This Post Posted: 05 August 2020 at 04:50
Originally posted by QuietOC QuietOC wrote:


There is no AF during bursts at higher than LO frame rate with any of the Sony adapters on non-A9 models. With higher frame rates the focus will lock at the beginning of the burst. Many don't notice this, and believe they get focus tracking. Some complain about poor tracking performance.


That's exactly what I was concerning.
Seems like LA-EA4 can do AF tracking during high bursts, but its performance was bit outdated. I'm not sure switch to EA3 is a good trade-off or not.
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 05 August 2020 at 11:32
The LA-EA4 locks focus at the first frame of bursts on every camera at any frame rate higher than LO.

The LA-EA4 will focus during video with the lens stopped down to f/3.5 or wide-open for slower lenses.

Edited by QuietOC - 05 August 2020 at 11:37
Sony A7III NEX-5T HVL-F45RM LA-EA3 LA-EA4 MB-IV MC-11 EF-E II MD-NEX KR-NEX DA-NEX
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9 AF-P/Q
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