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LA-EA4r Monster Adapter v02

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4paul View Drop Down
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Post Options Post Options   Quote 4paul Quote  Post ReplyReply Direct Link To This Post Topic: LA-EA4r Monster Adapter v02
    Posted: 16 February 2022 at 00:02
New firmware v06 with "G Driver"; I finally think it is safe, so I ordered the EA4r board yesterday.

On their website there is a news blog update which seems to indicate it is (probably) correct that even if I accidentally don't power off the camera:

1 using a Z100 battery means the camera and lens are (probably) safe, the battery circuit breaker will trip but save the camera and lens

2 using Minolta lenses with 5 contacts (probably) will not short the camera

The safest way is to drop the battery, or remove the EA4r from the camera ... then swap the lens.

I still have a a7ii, which was the original source of the "shorted camera main board" problem, although minolta_mutley says the lens chip shorted (5 contact lens??).

source: https://www.monsteradapter.com/blogs/%E6%96%B0%E9%97%BB/la-ea4r-important-notice-do-not-hot-swap-a-mount-lenses-while-camera-still-on

Note I believe it is still true that the EA4r does not drive SSM/SAM lenses, whereas the EA5 does, except for a couple lenses noted on the EA5 thread https://www.dyxum.com/dforum/sony-laea5-adapter-250-october_topic138554_page26.html

I used a silver and gold sharpie marker to put the number of the adapter on it, so the EA2 has a big "2" on the sides, etc. I'll add the "r" after I swap the board.
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Post Options Post Options   Quote minolta_mutley Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2021 at 12:19
My LA-EA4R arrived yesterday - and this morning i started the "surgery" on the LA-EA4 adapter i bought. Without the video from Mr. Friedman (links on this forum) - it'd have been a little bit more difficult.

This proves the high value of Mr. Friedman and this forum!

You need to be handy with these small cables - it took me about 20' the work done.

And i took a plastic box for sorting screws/nails - to put al small screws and parts inside. So we couldn't switch them.

We tried it on our A7RII (the cheapest to replace- of all my a7's) - and it works fine with my Minolta 50mm f1.7.

One issue still needs to be solved though - how am i going to pimp/paint the adapter - because i want to be able to recognize it. Maybe a few Red R's on all sides?

Idea's are welcome.

Now we'll start soon the tests with all our screw-driven-Minolta-lenses (and we'll switch of the camera while changing lenses! I ruined my 24mm chip on a K-M 24mm f2.8 once and it'll never happen again!).
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Post Options Post Options   Quote minolta_mutley Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2021 at 20:39
I ordered a 2nd-hand LA-EA4 + the monster electronics board.

We want all our remaining lenses to work on all my A7's (RII & III).

I'll have to wait a few weeks for the board to arrive - if we're lucky we can use this lens on a future Benelux-Dyxum-meeting.

And yes - we understand that the camera needs to be switches off when changing lenses with the LA-EA4r (i once ruined a 24mm chip on a minolta lens by not powering the camera down - so this is something we won't forget).
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2021 at 15:12
Originally posted by addy landzaat addy landzaat wrote:

I guess the reliability of AF decreases when you move out with the 500mm. The Sony DSLT's and Sony/Minolta (D)SLR did the same. I guess their is a range in the centre that is considered good enough. That area might be known from the time the lens was designed and they just used the setting that is closest to that.

This is true with any lens. Sony's limitation of many APS-C lenses to only 61 points of the 79 point discrete sensor also feels rather arbitrary. Why only just that amount?

The frame coverage of the on-sensor phase-detect keeps increasing. I assume extra processing/data is needed off-axis phase-detect.

Edited by QuietOC - 10 April 2021 at 15:35
Sony A7RIV LA-EA5
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2021 at 14:37
Come to think of it - I missed something: if you do not own an A7r4, A1 or A6600 it might be the best option in town.

I guess the reliability of AF decreases when you move out with the 500mm. The Sony DSLT's and Sony/Minolta (D)SLR did the same. I guess their is a range in the centre that is considered good enough. That area might be known from the time the lens was designed and they just used the setting that is closest to that.
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2021 at 13:34
Interesting that the modified LA-EA4 focuses on the Alpha 1 because a stock LA-EA4 is limited to manual focus on that body.

Sony allows the 500mm F8 to use slightly more than the center AF points on the LA-EA5. I wonder what criteria they used to choose that area?

Edited by QuietOC - 10 April 2021 at 13:38
Sony A7RIV LA-EA5
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9
 



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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2021 at 09:27
Interesting video.

My take aways.
I think the LA-EA5 is quicker (if your camera supports it )
The LA-EA4r is useable.
I would not like the step AF character of the LA-EA4r. In fact, it is the way the A7r2 handles adapted SSM/SAM lenses and I do not like it. The A7r4 is much, much better with the LA-EA1/3 then the A7r2.

I see four reasons to get the LA-EA4r:
1) you like the fact that a third party made it (or you hate Sony limitations)
2) you like to tinker
3) you want to save some money
4) you want to use the outer focus area with the 500mm mirror
Did I miss anything?
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Post Options Post Options   Quote mirthseeker Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2021 at 06:38
Gary Friedman has sent out a final email to those interested in his work on the Monster adapter.

"Hi there! Gary Friedman here again.

This will be my final post about the monster adapter. I finally had time to create a youtube video with low production values, showing the differences between the Sony LA-EA5 and the Monster Adapter with Firmware v4. You can see it here:

https://youtu.be/Xy4GZURBkF0

The Monster adapter is much more reliable than in the past, and now even supports some 3rd party lenses. Below is a summary of the differences between these two adapters:"

Regretfully, I have not been able to correctly format Gary's table and include it here.


"So will I be taking this project on? Regretfully no, as I simply do not have the time. Iíll be moving again shortly and we plan on spending many months on the road in the coming years, making mail-order modifications a difficult thing to do.

You can purchase the board here https://www.ebay.com/itm/MonsterAdapter-LA-EA4r-Upgrade-kit/224267929385?hash=item3437690729:g:19EAAOSwjPtfQmT8 , and donít forget my video showing my first attempt at the microsurgery is here: https://youtu.be/9a-NuV3fW4E

Thatís it for now. Thanks for your interest and enthusiasm for this project (and for your patience for promised updates!)

Sincerely, Gary
"
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Post Options Post Options   Quote gigo Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2021 at 09:50
Originally posted by QuietOC QuietOC wrote:

Anyone have a working link to the V03 firmware?

I would like to use the Tamron 90mm F2.5 with the LA-EA4r. It worked fine with V03 and doesn't work with V04.

I don't know a valid link, but I have a v03 binary.
I don't have LA-EA4r anymore so I can't confirm, but is it possible to downgrade Firmware?
Isn't it better to ask the author to support it with v05?
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 04 April 2021 at 14:31
Anyone have a working link to the V03 firmware?

I would like to use the Tamron 90mm F2.5 with the LA-EA4r. It worked fine with V03 and doesn't work with V04.
Sony A7RIV LA-EA5
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2021 at 14:31
Ah, thanks. Something to balance against the focus modes of OSPDAF.
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2021 at 13:12
The A7RII phase-detection is pretty weak. Mine was just struggling with a 70-300 F4-5.6. The old 15-point sensor in the LA-EA4 works in much more challenging conditions.

Edited by QuietOC - 25 February 2021 at 14:54
Sony A7RIV LA-EA5
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9
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Post Options Post Options   Quote mambo Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2021 at 12:30
Originally posted by Miranda F Miranda F wrote:

Can anyone comment on the relative AF capabilities with this, versus before modification?
I ask because my impression of using the A7Rii is that on-sensor PDAF works very well for small focus errors, but for large focus errors - especially on long telephoto lenses - it loses PDAF more quickly than the A-mount PDAF setup, choosing a direction more or less randomly. This could be because the A-mount's larger mechanical assembly detects the correct way to go even with fairly large focus errors (macro excepted).


My experience has been positive. With my 200mm f2.8G AF speed is about the same as when I used the original LA-EA4. The bonus is that I have far more AF points to choose from. In low light, I think the AF speed and accuracy is about the same as before.
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2021 at 11:19
Can anyone comment on the relative AF capabilities with this, versus before modification?
I ask because my impression of using the A7Rii is that on-sensor PDAF works very well for small focus errors, but for large focus errors - especially on long telephoto lenses - it loses PDAF more quickly than the A-mount PDAF setup, choosing a direction more or less randomly. This could be because the A-mount's larger mechanical assembly detects the correct way to go even with fairly large focus errors (macro excepted).
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
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