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

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EddyH View Drop Down
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Post Options Post Options   Quote EddyH Quote  Post ReplyReply Direct Link To This Post Topic: We need a LA-EA5: eye AF on SAL135mm f1.8
    Posted: 14 November 2017 at 08:32
The A7R III looks really interesting (I admit, I just ordered one...), but there is one accessory missing: an adapter that will make eye AF possible with the SAL 135mm f1.8. This is one of my favorite lenses and I'm probably not the only one. I would love to have eye AF with that lens!

Or did I miss something? I checked the compatibility list and that says eye AF is not supported on the LA-EA4 / LA-EA3.

I guess it shouldn't be that difficult to produce that: take the LA-EA4, get rid of the mirror and the dedicated AF module inside the adapter and use the camera AF to drive the screw inside the adapter. That should work, isn't it?

Maybe we should start a petition?

Eddy

Edited by EddyH - 14 November 2017 at 09:39
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Stuart1701 View Drop Down
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Post Options Post Options   Quote Stuart1701 Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 08:43
Agree.

Sony need to do either an Ea4 mk 2 with mirror and the A99ii focus module that supports Eye-AF. Would have the advantage of allowing EyE AF on older bodies.

Or

A motorised version of the EA3. This would need the bodies to support Eye-AF in the firmware. Currently only the A9 and A7R3 do this. Ideally this functionality would need to be retro fitted on older bodies.

Or

Both.
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Faldrax View Drop Down
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Post Options Post Options   Quote Faldrax Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 09:43
An adaptor that used the camera AF but could support screw drives lenses via an in-adaptor motor would be great.

Currently if you have a mix of SSM and Screw drive lenses, you are forces to either get the EA4 and compromise the AF for SSM, get the EA3 and leave your screw drives lenses at home, or get both - crazy.
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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: 14 November 2017 at 11:19
My A99m2 does eye focus with screw driven lenses, no need for an adapter
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EddyH View Drop Down
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Post Options Post Options   Quote EddyH Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 11:27
Originally posted by addy landzaat addy landzaat wrote:

My A99m2 does eye focus with screw driven lenses, no need for an adapter

Correct, but that camera is soooo 2016...

Eddy
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 15:56
Originally posted by Faldrax Faldrax wrote:

An adaptor that used the camera AF but could support screw drives lenses via an in-adaptor motor would be great.

Currently if you have a mix of SSM and Screw drive lenses, you are forces to either get the EA4 and compromise the AF for SSM, get the EA3 and leave your screw drives lenses at home, or get both - crazy.


Not quite. You have other options. You can buy E-mount lenses or stick to an A-mount camera.

If you have two screw-drive lenses you need the EA4 and if you have two in-lens motor, use the EA3. If you have one of each you can leave the adapter on the lens and treat it as part of the lens. More than one of each? Duh ...

Okay, I admit I'm a little puzzled here - if you're buying an E-mount camera because it's smaller and lighter than A-mount, why are you trying to carry multiple A-mount lenses around with you???

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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 16:27
Canon definitely made the right choice back in 1987 to do to an all electronic mount.

Nikon doesn't support their current screw-drive AF lenses on the majority of the SLRs (entry level, APS-C) they now sell and have been selling. Now they are releasing AF-P and E lenses that don't work with the majority of the cameras they have already sold. It seems like this might have been a good time for them to have gone to a new lens mount. I notice that Nikon's 135mm F2 is also a screw-drive lens.

A99II type Hybrid AF and Eye AF may be able to be implemented with just a firmware update to the LA-EA4 and/or FE cameras.
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Post Options Post Options   Quote sybersitizen Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 17:49
Originally posted by EddyH EddyH wrote:

Originally posted by addy landzaat addy landzaat wrote:

My A99m2 does eye focus with screw driven lenses, no need for an adapter

Correct, but that camera is soooo 2016...

And that lens is soooo 2006. Your camera might get eleven-year-old cooties from it.
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Post Options Post Options   Quote trainerKEN Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2017 at 21:02
I, myself, would love it if there was a way to adapt the 135mm F1.8 to my a7Rii and a6500 and get better AF (better AF points, or Eye-AF), as of now, I don't use that lens and I'm about to list it for sale... I actually end up using a Canon 135L instead, using either the Metabones or MC-11 adapter, either works better that trying to get subject's eyes in focus (when NOT centered composition)
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Post Options Post Options   Quote EddyH Quote  Post ReplyReply Direct Link To This Post Posted: 15 November 2017 at 07:48
Originally posted by Miranda F Miranda F wrote:


Okay, I admit I'm a little puzzled here - if you're buying an E-mount camera because it's smaller and lighter than A-mount, why are you trying to carry multiple A-mount lenses around with you???


I can't answer for Faldrax, but in my case: I've switched to E-mount lenses except for the 135mm f1.8 and the 70-400 G II. The first isn't available in E-mount, the second is one I rarely use and I can't justify to upgrade it.

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EddyH View Drop Down
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Post Options Post Options   Quote EddyH Quote  Post ReplyReply Direct Link To This Post Posted: 15 November 2017 at 07:51
Originally posted by QuietOC QuietOC wrote:

A99II type Hybrid AF and Eye AF may be able to be implemented with just a firmware update to the LA-EA4 and/or FE cameras.


A firmware update of the LA-EA4 could indeed also be an option. But in that case it should use the camera AF, not just update the adapter AF, I guess.

Eddy
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EddyH View Drop Down
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Post Options Post Options   Quote EddyH Quote  Post ReplyReply Direct Link To This Post Posted: 15 November 2017 at 07:53
Originally posted by sybersitizen sybersitizen wrote:

And that lens is soooo 2006. Your camera might get eleven-year-old cooties from it.

I guess I'll need to have a serious and probably long conversation with my camera about cooties and cootie shots...

Eddy
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Post Options Post Options   Quote PMac Quote  Post ReplyReply Direct Link To This Post Posted: 16 November 2017 at 11:32
Originally posted by Miranda F Miranda F wrote:



Okay, I admit I'm a little puzzled here - if you're buying an E-mount camera because it's smaller and lighter than A-mount, why are you trying to carry multiple A-mount lenses around with you???



i cant answer for Faldrax either but this is a question I get asked a bit when I occasionally use a 'big' lens and it also comes up in reviews when they compare an A7 with a big prime to, say, a D850 with a similar lens.

In short, I like the e-mount because it doesnt "have" to be big. If I want a small camera (as I do when I slip it into my bike jersey sometimes) I can put the 35 2.8 on and it good to go. If the A7 needs to be bigger, I can do that by adding a grip but if I want an A99 to get smaller I'm out of luck.
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Post Options Post Options   Quote C_N_RED_AGAIN Quote  Post ReplyReply Direct Link To This Post Posted: 16 November 2017 at 11:49
What pmac says. My new a7rii with grip is half the size of my a99 with grip. My a6500 is even tinier and can literally go in the pocket. If I want bigger or want to shoot a mount lenses I can. If I want to go small and portable I can. If I want to shoot a Leica lens I can or a rokkor lens etc etc
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