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We need a LA-EA5: eye AF on SAL135mm f1.8

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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 24 September 2020 at 16:46
The LA-EA5 sounds great except that it doesn't work on my camera. Is the A7 II to be considered obsolete? Is it that difficult to make the adapter work on all E-Mount. Although my interest is limited to just A7 II and one lens - the AF Reflex 500, I'd buy the adapter if it worked. I have the EA4 but don't trust the focus accuracy. Has Sony indicated their intentions regarding what they might support in the future?
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 24 September 2020 at 17:37
Mike, I doubt they will still update the firmware of a camera that came out 6 years ago. I have one as well so I hope I'm wrong but I'm not holding my breath.

You might be better off converting your LA-EA4 to a so-called monster adapter. It seems to work on older cameras and with the 500 mirror has the advantage of being able to use the whole AF array (with the LA-EA5 you only get one central AF point)
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 24 September 2020 at 23:43
Originally posted by pegelli pegelli wrote:

Mike, I doubt they will still update the firmware of a camera that came out 6 years ago. I have one as well so I hope I'm wrong but I'm not holding my breath.

You might be better off converting your LA-EA4 to a so-called monster adapter. It seems to work on older cameras and with the 500 mirror has the advantage of being able to use the whole AF array (with the LA-EA5 you only get one central AF point)


Thanks, Pieter. I'd prefer the Sony product. Do you know for fact that the Monster supports greater focus area? I've been okay with the spot but just not the accuracy. I know very little about auto-focus and the Reflex 500 is the only AF I've used since going mirrorless nine years ago or more. I just don't get all those focus points when a lens is in focus only in one spot, and with the 500 mirror, that is a very shallow spot.
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 25 September 2020 at 08:04
Originally posted by woodrim woodrim wrote:

Do you know for fact that the Monster supports greater focus area?
I have neither adapter nor the AF500 reflex so I'm not speaking from personal experience. However I've seen several discussions about this in this thread or the monster adapter thread I linked to. And like you I also mainly use the central spot so for me that wouldn't be a deciding factor, actually what I use most is manual focus lenses, so AF and AF array is usually a non-issue for me
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 25 September 2020 at 09:31
Pieter, in the thread you linked to, there is no discussion on the AF 500/8 Reflex. There is some discussion on it in the thread linked to there, but that thread is 12 pages

Mike, you better ask that question in the thread Pieter linked to. There are some people in the know there. The AF 500/8 RF always only used the central focus point on any Sony/Minolta camera AFAIK. I understand that this is because of the optical characteristics of a reflex lens. It seems it is not that easy to focus a reflex lens, illustrated by the fact that the Sony/Minolta AF 500/8 RF was the only AF reflex lens.

I feel Sony is really conservative with allowing focus with lenses. For instance, with some lenses the A77m2 does not allow you to use the outer focus points. I think Sony feels the outer focus points with the AF 500/8 RF are not reliable enough. That might be overly conservative or the correct choice. With the Monster adapter you can choose the other focus areas, but how reliable those are, I do not know. Maybe somebody in the other thread can tell you.

According to Sony you can only choose the center Spot AF frame. But that is not a small point. The "point" is as big is the Large flexible spot setting. I am sure that this point is bigger then the AF-point on the LA-EA4.
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 25 September 2020 at 15:08
Originally posted by pegelli pegelli wrote:

[QUOTE=woodrim] actually what I use most is manual focus lenses, so AF and AF array is usually a non-issue for me


Me too, since 1971. That's why I haven't kept up with AF technology and don't understand how it determines the precise point where to focus.
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 25 September 2020 at 15:26
Originally posted by addy landzaat addy landzaat wrote:

Pieter, in the thread you linked to, there is no discussion on the AF 500/8 Reflex. There is some discussion on it in the thread linked to there, but that thread is 12 pages

Mike, you better ask that question in the thread Pieter linked to. There are some people in the know there. The AF 500/8 RF always only used the central focus point on any Sony/Minolta camera AFAIK. I understand that this is because of the optical characteristics of a reflex lens. It seems it is not that easy to focus a reflex lens, illustrated by the fact that the Sony/Minolta AF 500/8 RF was the only AF reflex lens.

I feel Sony is really conservative with allowing focus with lenses. For instance, with some lenses the A77m2 does not allow you to use the outer focus points. I think Sony feels the outer focus points with the AF 500/8 RF are not reliable enough. That might be overly conservative or the correct choice. With the Monster adapter you can choose the other focus areas, but how reliable those are, I do not know. Maybe somebody in the other thread can tell you.

According to Sony you can only choose the center Spot AF frame. But that is not a small point. The "point" is as big is the Large flexible spot setting. I am sure that this point is bigger then the AF-point on the LA-EA4.


I think you make some good points. Minolta also made a 400mm mirror lens that was AF, but in the Vectis mount. I have that one too and am in the process of converting it to manual focus (not easy) and E-mount.

I do like the idea of eye-focus, or whatever it's called. I use the center for focusing manually as well and find with birds that capturing the eye is critical. The DoF is so shallow that the beak and eye might not both be in focus. I suspect that may have also been a reason Minolta and Sony limited the AF decision to the center.

If only Sony would cover more of our needs, it would be a better choice and less costly.
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Post Options Post Options   Quote gigo Quote  Post ReplyReply Direct Link To This Post Posted: 23 October 2020 at 23:11
LA-EA5 New Comprehensive Review (Chinese)
https://www.mobile01.com/topicdetail.php?f=254&t=6217758&utm_source=dable

Edited by gigo - 23 October 2020 at 23:41
7RIV,9,6300,99II.., FE:16, E:6, A:18 lenses
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 24 October 2020 at 18:19
A comprehensive review of a product that is not yet very comprehensive. Might they really limit compatibility to so few cameras? Certainly, if the Monster people can accommodate more cameras and lenses, Sony can.

The Monster adapter for the Vectis line is once again available. I will be purchasing one for my 400 AF Reflex. I sure hope the quality of the lens justifies the cost of purchase and dedicated adapter.
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woodrim
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