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old good A-mounts or new E-all-in-one

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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2021 at 21:21
Originally posted by neilt3 neilt3 wrote:

Originally posted by ahaveland ahaveland wrote:

Thanks for many good advice here.
I have not checked the details of which lenses/body/adapters would give me best AF.
However I already have LA-EA4 with built in focus motor. But this use the contrast points I guess.



The LA-EA4 uses phase detect AF sensors built into it , the same as the A mount SLT cameras .
Rather than the contrast AF the camera does off the main sensor .
The A7r2 has phase detect sensors off the main sensor with adaptors like the LA-EA3/5.
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2021 at 22:05
Originally posted by addy landzaat addy landzaat wrote:

Originally posted by neilt3 neilt3 wrote:

Originally posted by ahaveland ahaveland wrote:

Thanks for many good advice here.
I have not checked the details of which lenses/body/adapters would give me best AF.
However I already have LA-EA4 with built in focus motor. But this use the contrast points I guess.



The LA-EA4 uses phase detect AF sensors built into it , the same as the A mount SLT cameras .
Rather than the contrast AF the camera does off the main sensor .
The A7r2 has phase detect sensors off the main sensor with adaptors like the LA-EA3/5.


Correct , but the camera makes no use of them with the O.P's LA-EA4 .
Which is a shame , as if they could used for a final check by the camera they would remove the need for MFA .

Edited by neilt3 - 17 December 2021 at 22:16
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 08:31
Aha, but the LA-EA4 does not use of the contrast AF off the main sensor AFAIK.

To summarize:
LA-EA4 - uses the AF system of older A-mount cameras.
LA-EA3/EA5 on A7r2: uses the on-sensor phase-detect and contrast points with the SAM/SSM (HSM) lenses - not with screw drive lenses. AF is acceptable in my experience, but newer cameras are better.
LA-EA5 on A7iv/A7r4/A1: uses the on-sensor phase-detect and contrast points with both SSM/SAM and screw drive lenses. AF is good.
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 09:01
Originally posted by addy landzaat addy landzaat wrote:

Aha, but the LA-EA4 does not use of the contrast AF off the main sensor AFAIK.



That's right .
The LA-EA4 is a stand alone unit as far as AF goes .
Like I said when I wrote " The LA-EA4 uses phase detect AF sensors built into it" .
It doesn't use any of the cameras AF capabilities .

EDIT ; That's unless you convert it to an LA-EA4r with the Monster adapter chip , although I've no idea on compatibility with that set-up .

Edited by neilt3 - 18 December 2021 at 09:36
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 09:39
Originally posted by neilt3 neilt3 wrote:

Originally posted by addy landzaat addy landzaat wrote:

Aha, but the LA-EA4 does not use of the contrast AF off the main sensor AFAIK.


Like I said when I wrote " The LA-EA4 uses phase detect AF sensors built into it"
I got confused by your remark about contrast AF. Therefore the summary
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 11:01
Compatibility of the LA-EA adapters is a bit of a minefield - check the compatibility pages on the Sony website before buying.

With the LA-EA3 note the AF speed comments, while it sort of works on some older bodies the AF speed is incredibly slow, making it pretty useless.

The LA-EA5 will only work on the very latest bodies and some of those will not work with the older adapters.

The LA-EA4 AF is pretty much the same as the A99 and includes the ability to do microfocus adjustments.
 



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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 11:15
Originally posted by Phil Wood Phil Wood wrote:

With the LA-EA3 note the AF speed comments, while it sort of works on some older bodies the AF speed is incredibly slow, making it pretty useless.
What do you mean by "older bodies"? In my experience it is fine on the A7r2 - but do not expect to photograph sports.

Don't try it on the A7 or A6000, but the A7r2 or later is fine for most kinds of photography.

Originally posted by Phil Wood Phil Wood wrote:

The LA-EA5 will only work on the very latest bodies and some of those will not work with the older adapters.
The LA-EA5 works like a LA-EA3 on older cameras. So, it focusses SAM/SSM lenses, but not screw drive lenses.

Originally posted by Phil Wood Phil Wood wrote:

The LA-EA4 AF is pretty much the same as the A99 and includes the ability to do microfocus adjustments.
The LA-EA4 has the older AF system. It has 15 focus points with 3 cross types, the A99 has 19 AF points with 11 cross types (and the 102 support points).
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 13:51
Originally posted by addy landzaat addy landzaat wrote:

Originally posted by neilt3 neilt3 wrote:

Originally posted by addy landzaat addy landzaat wrote:

Aha, but the LA-EA4 does not use of the contrast AF off the main sensor AFAIK.


Like I said when I wrote " The LA-EA4 uses phase detect AF sensors built into it"
I got confused by your remark about contrast AF. Therefore the summary


No problem .
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 13:57
Originally posted by Phil Wood Phil Wood wrote:

Compatibility of the LA-EA adapters is a bit of a minefield - check the compatibility pages on the Sony website before buying.



My comment about compatibility was regarding the LA-EA4r modification .
The chips supplied by the Monster adapter folk ( not Sony ) , so you would need to check on their website if they have one .
I think they just have a Facebook account with the details on , rather than a proper website .
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Post Options Post Options   Quote ahaveland Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 22:53
DSC09116 by A_H_A_V, on Flickr

DSC09119 by A_H_A_V, on Flickr

DSC09137 by A_H_A_V, on Flickr


Thanks for keeping my discussion alive.

Here are three uncropped photos form today's short hike. Compressed by the playmemories app on my mobile. However I do see that the minolta 28-135 is versatile in range. But I feel that the resolution is far from my experience will so you feel 28-70 3.5-5.6 OSS which I had to sell with my a7.

I wasn't planning to spend more money right now.. but I see that I both want to keep my primes, and get a better walkabout zoom..

Edited by ahaveland - 20 December 2021 at 07:45
A100 and A7, SEL28-70OSS, Min 50F1.7, Min 28-135F4-4.5, Tokina 17mm F3.5 PRO. LA-EA4. Sigma 85mm F1.4 Ex-DG-HSM. Sigma 105mm F2.8 Macro EX-DG-OS-HSM.
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Post Options Post Options   Quote ahaveland Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2021 at 22:55
https://www.flickr.com/photos/49697745@N04/

Not sure if the Flickr links above worked. But here is my profile.
A100 and A7, SEL28-70OSS, Min 50F1.7, Min 28-135F4-4.5, Tokina 17mm F3.5 PRO. LA-EA4. Sigma 85mm F1.4 Ex-DG-HSM. Sigma 105mm F2.8 Macro EX-DG-OS-HSM.
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 09:08
How to post pictures here, read this thread: https://www.dyxum.com/dforum/posting-images-and-links-faqs_topic28010.html

What you see is that the camera compensates the faults of the 28-70 but not of the 28-135. That gives the impression that the 28-70 is better. FE lenses have this option.

How often do you use your primes?
Where do you use your macro for? The Tamron 28-200 has a 1:3 macro that is not good for bugs but fine for flowers.

I assume you saw the reviews in our lensdatabase: https://www.dyxum.com/reviews/lenses/Tamron-28-200mm-F2.8-5.6-Di-III-RXD_review7071.html
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Post Options Post Options   Quote ahaveland Quote  Post ReplyReply Direct Link To This Post Posted: 20 December 2021 at 07:50
Thanks Addy,
Fixed the flickr links.

These photos are posted for the disussion of lens sharpness only. Not neccesarily photos I would post public othervise.


I found a SAL28-75 F2.8 Lens locally. And agreed with the seller to buy it for around 110Euros inc postal freight. This was low enough cost to not needing to sell off any primes.

So I might update the discussion later in the christmas holidays when it arrives here.
A100 and A7, SEL28-70OSS, Min 50F1.7, Min 28-135F4-4.5, Tokina 17mm F3.5 PRO. LA-EA4. Sigma 85mm F1.4 Ex-DG-HSM. Sigma 105mm F2.8 Macro EX-DG-OS-HSM.
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 20 December 2021 at 11:40
I had a very good copy of the FE 28-70 OSS that was sharper than any of the Minolta 28-135's I've had. It's main fault is being a kit zoom that has some variation. Though that is also a problem with some expensive Sony lenses.

The SAL2875 also gets Lens Compensation when used on the full-frame E-mount cameras. I have a sharp copy of that one too. I had two copies of the Tamron branded version that were not as good, but were still sharper than the Minolta zooms. The SAM is pretty slow and noisy, but works well enough.

I prefer the rendering of the FE 28-70 OSS over these.

Edited by QuietOC - 20 December 2021 at 11:46
Sony A7RIV LA-EA5
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9
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