FAQ FAQ  Forum Search   Events   Register Register  Login Login

LA-EA5 or LA-EA6?

Author
chijrt View Drop Down
Newbie
Newbie

Joined: 26 April 2012
Country: United States
Location: Philadelphia
Status: Offline
Posts: 20
Post Options Post Options   Quote chijrt Quote  Post ReplyReply Direct Link To This Post Topic: LA-EA5 or LA-EA6?
    Posted: 19 May 2020 at 16:05
Anyone heard of the possibility of Sony potentially considering the development of an LA-EA5 or LE-EA6 adapter? I haven't heard much but while the LA-EA3 and 4 for the most part do their job in allowing for A-mounted lenses on an FE camera, there are a few missing things I am hoping for if (and this is probably a big if) Sony comes out with the 5 and/or 6:

1. Faster focusing especially for the adapter without the translucent mirror.
2. Built-in OSS as none of the A-mounted lenses have it. I understand FE cameras have OSS but having an additional layer of OSS (just like how some FE lenses have OSS) helps to stabilize the shot even further.
3. Probably the most important to me: the ability to attach teleconverters.

 



Back to Top
addy landzaat View Drop Down
Senior Member
Senior Member

Joined: 22 April 2006
Country: Netherlands
Location: Netherlands
Status: Offline
Posts: 10741
Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 16:52
1. Focus speed is a product of the lens and the camera. What do you expect from a different adaptor? It might make a slight difference with better electronics, but not that much.

2. OSS is Optical Steady Shot, to introduce it they need to make an optical adaptor. That will mean there needs to be a change in focallength.

3. I do not know why the A-mount teleconverters do not work, as my Canon lenses work with extenders and the Sigma MC-11 on E-mount cameras. Sony probably found it to complicated to add support for teleconverters. You can however use third party teleconverters, some Kenkos supposedly are quite good.

The LA-EA3 is fine imho. You might be interested in this third part option, that gives you the option to use screw-drive lenses without the mirror.
Why not follow me on Instagram? @Addy_101
Back to Top
QuietOC View Drop Down
Senior Member
Senior Member

Joined: 28 February 2015
Country: United States
Location: Michigan
Status: Offline
Posts: 2920
Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 16:56
1. is available using the electronic shutter of the A9 models with the LA-EA3.
2. An active shift adapter might be possible, but could not be as effective as just shifting the much lighter sensor.
3. Kenko DGX teleconverters work fine on the existing adapters. Sony could support their own teleconverters.

There are many factors in the time it takes to focus. The Sony FE 85mm F1.8 has a fast AF motor, but I find it often takes a noticeable amount of time to lock focus in AF-S on my A7III. I wouldn't be surprised if the very slow Sony 85mm F2.8 SAM would lock faster on the LA-EA4.

I don't find focus motors run any slower on adapters. The Canon EF 85mm F1.8 USD focused locked super fast using the Sigma MC-11.

I have had EF and A-mount versions of a few lenses and either adapter or either native mount, all focused the same speed. The native hybrid AF-S cycle on E-mount is a slower process with native or adapted lenses.

I would like focus tracking during bursts at more than the LO frame rate especially with the LA-EA4. I don't understand why it is limited to the lower frame rate. One issue with the LA-EA3 is the mechanical shutter blocks the sensor with the AF points while in use. The LA-EA4 AF sensors are in front of the shutter.

Edited by QuietOC - 19 May 2020 at 17:39
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
Back to Top
Bob J View Drop Down
Admin Group
Admin Group
Dyxum Administrator

Joined: 23 December 2005
Country: United Kingdom
Location: London
Status: Offline
Posts: 26005
Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2020 at 23:03
The idea of a new adapter is exciting, but I can only think that one new adapter is needed - after all the LA-EA3 already does everything (ie it stops down the lens, passes info and focuses SSM/SAM lenses).

An La-EA? should be able to focus screw-drive lenses, but as both Sony and Nikon haven't done a non-pelix adapter that can do that, I'm left thinking there might be some sort of intrinsic problem (but I'd love to be wrong!)
Back to Top
Phil Wood View Drop Down
Senior Member
Senior Member

Joined: 24 March 2013
Country: United Kingdom
Location: England
Status: Online
Posts: 1119
Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2020 at 00:04
I would like to see one new adapter - one size fits all.

The LA-EA3 is indeed fine as is, except that it doesn't focus screw-drive lenses.

So:

1 built-in motor to handle screw-drive.
2 no mirror, work with the camera body's focus system as a native lens is attached.
3 work with screw-drive or motorised lenses.

I don't really care about focusing speed and certainly don't expect anything better than A-mount bodies can do in that respect.

TBH I'm not that worried about TCs, but would hope they would work as they do on A mount bodies.

The Chinese LA-EA4 modification kit that is being reported on recently will, if it turns out to work well, be a big advance in the right direction (removal of the mirror), but it does not (yet?) drive motorised lenses.
Back to Top
QuietOC View Drop Down
Senior Member
Senior Member

Joined: 28 February 2015
Country: United States
Location: Michigan
Status: Offline
Posts: 2920
Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2020 at 04:12
Originally posted by Bob J Bob J wrote:

An La-EA? should be able to focus screw-drive lenses, but as both Sony and Nikon haven't done a non-pelix adapter that can do that, I'm left thinking there might be some sort of intrinsic problem (but I'd love to be wrong!)

Some have reported that the A99II can focus the hybrid AF supported screw-drive lenses without the SLT mirror installed.

Techart made three generations of Contax G screw-drive to E-mount AF adapters. It sounds like the last one only works on the A7II generation, and it only supported like 6 prime lenses.
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
 



Back to Top
Phil Wood View Drop Down
Senior Member
Senior Member

Joined: 24 March 2013
Country: United Kingdom
Location: England
Status: Online
Posts: 1119
Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2020 at 08:41
Originally posted by QuietOC QuietOC wrote:

Originally posted by Bob J Bob J wrote:

An La-EA? should be able to focus screw-drive lenses, but as both Sony and Nikon haven't done a non-pelix adapter that can do that, I'm left thinking there might be some sort of intrinsic problem (but I'd love to be wrong!)

Some have reported that the A99II can focus the hybrid AF supported screw-drive lenses without the SLT mirror installed.

Techart made three generations of Contax G screw-drive to E-mount AF adapters. It sounds like the last one only works on the A7II generation, and it only supported like 6 prime lenses.


The LA-EA4 modification kit only works with later generations of the A7. It has been tested and calibrated for numerous primes but there are reports of zooms working well with it. It is firmware updateable, but I'm not sure how this is done.
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Lens Talk > Adapters and converters

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.047 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.