Review: Techart LM-EA9 Leica-M to Sony-E Autofocus Adapter


AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
Techart LM-EA9

When the original Techart LM-EA7 adapter had been released it was a revelation: turning your manual focus lenses into autofocus lenses, how great is that? But there were also quirks to overcome, some reliability issues and incompatibilities with later camera models.
Now 5 years later there is a fully reworked, improved version. Does it solve all the issues we had with its predecessor? Let’s have a closer look at this new Techart LM-EA9.


MountLeica M to Sony E
max. extension4.5 mm
Weight limit lens500g
Tested withSony A7III, Sony A7rII
Tested Firmware1.4.0

The Techart LM-EA9 sells for $399 and you can already order it on the offical homepage, B&H as well as (affiliate links)

Improvements over LM-EA7

  • four small ultrasonic motors instead of one bigger stepping motor for quieter and faster operation
  • more durable extension mount due to more connection points
  • improved ergonomics (no more bulge at the bottom)
  • the LM-EA7 was known to drain your battery even when the camera was turned off, I didn’t notice such behaviour with the LM-EA9


The Techart LM-EA9 was kindly provided free of charge by Techart for reviewing purpose for a few weeks.

Phillip already reviewed the predecessor here and I am going to reuse some parts of his detailed review where applicable.

How it works

If you want to automatically focus your M-mount lens you just attach it to the Techart Adapter, focus the lens manually to infinity, and you are set. Just half-press the shutter button to activate AF and the adapter will focus your lens just like any other AF lens.

The adapter achieves focus just as you would when you focus your lens manually. When you turn the focus ring of your manual lens you change the distance between sensor and lens.
The LM-EA9 does just the same: it has a variable extension of up to 4.5 mm.

Build Quality/Handling

The adapter generally feels solid and the design is way more sophisticated than that of the LM-EA7. The connection to the camera is very tight, my M-mount lenses show a tiny amount of radial play on this sample of the adapter though.
I pushed the adapter a bit by using a lens which weighs 510g and it still worked fine, but it does make less sound and of course also focuses faster when using smaller/lighter lenses.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
TTArtisan 35mm 2.0 Apo attached via Techart LM-EA9 to Sony A7rII

Of course I can’t tell you about sample variation with just one adapter and I don’t have any long term experience with it.

The LM-EA9’s design is definitely sleeker than that of its predecessor, but when extended you can still see rather big gaps between the bayonet and the outer casing. I am not sure I would be willing to use this adapter in the rain or dusty/sandy environments because of this.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
M->E adapters: Metabones – TTArtisan 6-bit – Techart LMEA9

Interestingly – despite the noticeably sleeker appearance – the Techart LM-EA9 weighs exactly as much as its predecessor: 133g. The lightest M-mount adapters weigh only around 50g.
I didn’t really like the big bulge at the bottom of the LM-EA7 as it didn’t work well with my L-brackets and was always in the way, this one only has a slightly bigger diameter than a normal adapter which makes using it way more fun

What lenses the LM-EA9 works best with?

What hasn’t changed compared to the predecessor: you won’t have a very wide focus range with longer lenses. The longer the focal length the more extension is needed to focus close and the adapter is limited to an extension of 4.5 mm.

In the following table I wrote down the lenses’ (measured) minimum focus distance that is reachable with the LM-EA9 when the lens is set to infinity:

Focal LengthMFD on LM-EA9
21mm0.20 m
35mm0.41 m
50mm0.75 m
75mm1.37 m
90mm2.13 m
135mm9.00 m

You can see that the range with longer lenses is quite limited whereas the benefit is that with wide angle lenses you can often focus closer than you normally could.

The following e-function gives a good approximation to calcuate the MFD for lenses of different focal lengths:

MFD [cm] = 0,1244 x e^(0,032*Focal Length [mm])

You can still use the focus ring to get close to where you subject is and let the AF do the rest, but this is quite bothersome when the distance between you and your subject(s) changes a lot. The longest focal length I tried was 135mm and here the operation was already rather bothersome.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
Sony A7III | Syoptic 50mm 1.1 | f/1.1 | LM-EA9

So ultimatey, I think with lenses not longer than 50mm there are little restrictions and the whole operation can be described as smooth. With lenses from 50-90mm there are some restrictions – prefocusing the lens might be needed – but it is still usable. Beyond that I didn’t find it really useful to be honest.

AF performance

General remarks

I mainly used the LM-EA9 with a Sony A7III, I didn’t notice a big difference in performance when using it on an A7rII though.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif

With most lenses the AF only works properly in the central part of the image whereaus outside of it it doesn’t work at all. Many people think this has to do with how sharp the lens is, but I don’t think so. Out of 11 M-mount lenses I tried the only ones that worked well also in the corners are the Leica 90mm 2.0 pre Asph and the Syoptic/Mr. Ding 50mm 1.1. My guess is this has to do with the lateral CA correction (this might have influence on the on sensor phase detect pixels) and these two lenses are overcorrected for lateral CA (which is rare to encounter).
I uploaded a few short videos where I tested how off center focusing for 4 different lenses works here. In the videos I used AF-C Flexible Spot, but the behaviour is the same when using AF-S as well as AF-C Wide and this is true when having eye AF activated as well.

The good news is that I rarely place people or their eyes outside of the rule of thirds intersections and here it still works well, so the limitations are not as big as they may seem at first sight.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
Sony A7III | Syoptic 50mm 1.1 | f/1.1 | LM-EA9


For still photography the AF works decently. With non moving subjects it hits the target most of the time, but the hit rate is still not as good as it is with a native lens.
I am happy to report that eye AF (tested with humans as well as animals) is supported and usually finds its target, this is of course very helpful.

TTartisan 35mm 2.0 apo aspherical aa e-mount fe sony a7rii a7riv review comparison contrast sharpness vignetting pancake small
Sony A7III | LMEA9 | TTArtisan 35mm 2.0 | f/2.0

For slow moving subjects it also works well enough in AF-C mode – I am not sure I would have been able to easily take this picture without the LM-EA9 – but I definitely recommend to take not only one shot, but rather a few more to make sure that one will be in good focus.

If you are thinking of tracking fast moving subjects – e.g. dogs or people doing sports – I am pretty sure you will end up being disappointed though.

I didn’t encounter a noticeable drop in AF speed or hit rate in low light when using the A7III.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
Sony A7III | Syoptic 50mm 1.1 | f/1.1 | LM-EA9


In video mode AF does not work at all, it hunts like crazy but never manages to hit the target.


As was already the case with the LM-EA7 you can change some basic settings. You do that by changing the aperture in the camera and pressing the shutter button.

Changing focal length

The first function is setting the focal length the adapter communicates to the camera. This focal length will be used for the IBIS to work properly and will also be written in the Exif data so you can track which lenses you have used. No matter the focal length setting, the adapter will always be recognized as a DT 40mm 2.8 SAM lens in the exif data – same was true for the predecessor.

But how to change the focal length setting? Set the aperture in camera according to the corresponding aperture value from the list below, take a picture and then dial back to f/2.0. Dialing back to f/2.0 is crucial, if you don’t do this your pictures will be overexposed.

For the LM-EA7 Techart provided a configuration app for Android that allowed for more distinct settings. Currently it is undecided if there will be such an app for the LM-EA9 as well.

Changing AF mode

The LM-EA9 offers two AF modes which are activated by taking a picture with the camera set to f/51 or f/57.

  1. Normal Focus Mode f/51
    The standard focus mode which should also be the fastest, not recommended for lenses that are faster than f/1.4 though
  2. Slow Focus Mode f/57
    Recommended when experiencing focus issues with lenses faster than f/1.4 in normal focus mode

To be honest with you: I did not notice any meaningful differences between these two focus modes.

Changing the parking position

How does it work? Whatever the adapter’s current position is when pressing the shutter button with the camera set to f/45 will be the new parking position. This already worked with the LM-EA7.

What can this be useful for? When you let the adapter focus as close as possible it will work as a 4.5 mm extension tube so you can focus closer than you usually could, especially with wide angle lenses.

To activate it you have to turn the aperture dial 27 clicks, take a picture and turn it back another 27 clicks. An issue carried over from the predecessor.

I only see very few use cases for this, often it is easier to just use either something close or far away to have the adapter retracted or extended and then switch to MF for it not to move around anymore.

Updating the firmware

The LM-EA9’s firmware can be updated which is a nice feature, as theoretically new features could be added or simply the stability and compatibility be improved.

I read that for the LM-EA7 the update process wasn’t very smooth and I am happy to report it works really well with the LM-EA9 now.
The LM-EA9 ships with a rear cap/dock that can be connected to a computer or Mac via an USB-Micro-C cable. After downloading the appropriate software from the Techart homepage you can choose the desired firmware from a list, no need to find the correct update file before. Even a downgrade to a previous version is currently possible.

Things you should be aware of

Set the camera to f/2.0

If your camera is set to anything but f/2.0 your pictures will be overexposed, so make sure it is always set to f/2.0.

Assign a custom button to AF/MF Ctrl Toggle

In camera (e.g. in the Fn Menu) you can only switch between AF-S and AF-C. If you want to focus your lens manually (and have the option to use Focus Magnify) you need to assign “AF/MF Ctrl Toggle” to a custom button.
This also allows you to use the adapter as a 4.5 mm extension tube: point the camera at something close and use AF so the adapter extends, then set the camera to MF to keep it extended and manually focus the lens from there.

Some lenses with infinity lock collide with the adapter

According to a reader (have a look at his comment) some lenses with infinity lock collide with the adapter and therefore cannot be used.

Using non-M-mount lenses

The LM-EA9 has a Leica M-mount but you aren’t limited to M-mount lenses. You can buy adapters for many other lens mounts to M-mount and turn them into AF lenses this way. Not any adapter to M-mount will fit though.

Also keep in mind the weight limit of 500g. The LM-EA7 had a weight limit of 700g but over time many of these adapter’s mechanics deteoriated, leading to tilt and ultimately degrading the image quality of the lens you are using with it. Therefore I think there are definitely reasons for the lower weight limit here and I would advice to stick to it.

Negative effect on Image Quality

The adapter can have a negative effect on the image quality of lenses with a floating elements design. If you use a unit focus lens (unit focus means all the elements move the same on focusing) image quality won’t be affected at all.
Lately there have been more rangefinder lenses that use a floating elements design, e.g.: Leica 50mm 1.4 Asph, Leica 35mm 1.4 FLE, Zeiss ZM 35mm 1.4, Laowa 9mm 5.6, Voigtländer VM 21mm 1.4 or 7Artisans 35mm 1.4 IF – to only name a few of the more popular ones. Older and longer M-mount lenses are usually unit focus.
If you think about using old SLR lenses via an additional adapter many of the wider and most of the autofocus lenses also feature a floating elements design as well.

AF-adapter techart leica m sony e fe fullframe autofocus mf close focus programmable exif
M->E adapters: Metabones – TTArtisan 6-bit – Techart LMEA9

As you can see from the picture above – because of the electronic contacts – the opening is a bit smaller compared to a “dumb” adapter like the Metabones.
So as was already the case with the TTArtisan 6-bit Leica-M to Sony-E adapter there is added vignetting when using the MS-Optics 135mm 2.4 lens.
All my other M-mount lenses work fine in this regard, but I am pretty sure there are more (fast and/or long) lenses where this can happen.

Firmware updates and product support

The predecessor LM-EA7 received its last firmware update in January 2018 – so roughly 2 years after release – to support A7rIII and A9. From what I have read the adapter still doesn’t work on the Generation 4 cameras (A7rIV etc.) at all and it doesn’t look like there will ever be a new firmware update to fix this.

I am not sure for how many years we should expect product support in the form of firmware updates, but if I had bought the LM-EA7 for ~400€ and I couldn’t use it anymore on newer cameras I wouldn’t be happy at all and I would definitely think twice before investing a big sum in another product of that company where this might happen again.



  • good AF with manual lenses
  • eye AF support
  • extends the close focusing abilities of your lens
  • solid build quality
  • firmware can be updated (if there are firmware updates)

  • price
  • weight limit for the lens of 500g
not good

  • only focuses reliable in the center of the frame with most lenses
  • no AF in video mode

To be honest with you, I have never been interested in the first generation Techart Pro LM-EA7: too clunky, too bulky, too noisy and after some time we found out it also has longevity issues.

When I was approached by Techart to have a look at this LM-EA9 and I saw the sleeker design and heard they are using several small ultrasonic motors instead of one noisy micro motor and the improved mechanical design I was immediately interested though.

And indeed, it turned out to be a really useful accessory I could actually see myself using regularly. I am even considering a thin filter mod for one of my Sony cameras to be able to use my favorite M-mount lenses with AF but without any optical compromises on a Sony camera.

The lack of firmware updates in the last 4 1/2 years for the predecessor and its compatibility issues with newer cameras are still a bitter pill to swallow and are also making me question to invest a big sum of money in this successor though.

Still, it is not like there is anything else like this on the market and this LM-EA9 definitely is a huge step up from the LM-EA7 and at the end of the day simply a really cool accessory. I have been telling you about all its quirks and limitations – and you should be aware of them – but in many scenarios it works actually quite well and as long as you are not shooting action pictures you may not even notice most of these limitations.

So if you were happy with the AF performance of the LM-EA7 you will definitely be happy with this LM-EA9, as the mechanics and usability have been greatly improved. If you want your M-mount lenses to focus by themselves, this is the way.

The Techart LM-EA9 sells for $399 and you can already order it on the offical homepage, B&H as well as (affiliate links)

PS: the LM-EA9 also opens up the possibility to give the camera to someone not that keen on manual focus to take an in-focus picture of you with a manual focus lens:

Sony A7III | LM-EA9 | TTArtisan 35mm 2.0 | f/2.0

Further Reading

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My name is Bastian and I am your expert here when it comes to ultra wide angle lenses, super fast portrait lenses (ranging from a 50mm f/0.95 to a 200mm f/1.8) and I also have reviewed way too many 35mm lenses. Don't ask me anything about macro or wildlife shooting though.

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31 thoughts on “Review: Techart LM-EA9 Leica-M to Sony-E Autofocus Adapter”

  1. Hi, it’s been a while for me to leave a comment here, and I’m so pleased to read your articles again :D.
    I’ve noticed your comments on FM LM-EA9 threads before the review, and one question emerged in my head: is the wobble issue of the predecessor solved completely on this version? No one could answer that for now, so I should wait and see about it.
    Even if there are some restrictions, I still like the concept. Focusing Voigtlander 50 f/1.2 manually on my nephew annoyed by the sun wasn’t easy for me. If I get a better chance to capture some fun moments with this adapter, I’ll use it.
    Thanks for the review.

    1. The wobble issue should theoretically be addressed with implementing four motors instead of one, but only time will tell how true that is.

        ProfHankD at DPreview pointed out 4.5mm depth of the lens carrier is not sufficient for supporting big, heavy lenses. So, it must be hard job to make it not wobble. Bastian already mentioned cheap helicoid macro adapters are not reliable like Hawk or Voigtlaender adapters even without AF function.

          1. Do you still use Voigtlaender close focus adpater? If there aren’t any sign of wobble, I guess LM-EA9 can do the same “technically”.

    1. Close to the center of the frame: yes, definitely.
      In the midframe and corners this lens has loads of aberrations, so I am not sure how well it will work, at least at wider apertures.

  2. When using lenses with floating elements what sort of image quality loss is there and to what degree? Is it big enough of a problem that you wouldn’t pair those lenses with this adapter?

    1. In most cases you will only notice the difference close to the minimum focus distance and you can of course always set a similar distance on the lens manually, then it will be hardly noticeable with most lenses.
      It also depends on the focal length, the shorter the focal length, the bigger the problems could be.

  3. Thank you for this early review of the new Techart adapter. I own the LEA7 adapter and plan to buy this LEA9 soon. I have to choose if I will spend my money for this adapter or a black Biotar 5,8cm F2 this month…

    It would be nice if 2 issues that bugged me with the LEA7 adapter would have been discussed in more detail here: AF noise and the battery drain of the old adapter. I found the information in the review but I had to use the search function since I skipped it over when reading the review.

    As a whole I like the idea of an universal Z-Axis-AF adapter. But Techart should invest more in software features and in some external controls. I don’t like the setting of the focal length over the aperture. You have to remember each focal length and could accidentially change it. It would be great and a more professional solution to add some buttons or wheels to adjust it.

    It would be great if users could store a list of lenses on the adapter so that I can add unusual focal length like 23mm. And then it can store the lens name in the Exif data. Maybe Techart did not figured out the name settings yet but that would be one big improvement for people with a lot of vintage lenses.

    I would like to set the aperture of the lens within camera. At the moment the camera over or underexposes if you change the aperture to another value than 2.0. But I figured out that the aperture value might be used for auto exposure calculation of Sony cameras. With > F2 there seems to be no real effect. But when using lenses with F1.4, F1.2 or F0.9 you will see that the auto exposure will change the calculation if you go to apertures < F2. What I mean is that the exposure set by the Sony cameras auto exposure of a (f.e.) Voigtländer Nokton 50mm F1.2 SE and VM will differ on the same camera when you use apertures like F1.4 or F1.2. The auto exposure will use a brighter image on the manual (VM) lens than on the lens with working aperture info (SE). So for bright lenses it would be helpful to set apertures <F2.

    And last but not least it might be helpful to adjust the micro calibration of the adapter. Please let users calibrate every lens separately. My LEA7 front focuses with every lens.

    1. The exposure between SE and VM versions differs because the E-mount version has electronic contacts (and most likely embedded correction profiles) which will influence the exposure calculation.
      You will also notice a difference when slightly unmouting the E-mount lens.
      There is no issue with using lenses faster than f/2.0 on the LM-EA9 and it is by no means needed to be able to set a value lower than f/2.0.

      1. You don‘t need to set apertures lower than F2. That was not the point I tried to explain. The point is what you mentioned about missing contacts. The LEA adapter is kind of added electronic contacts for every manual lens. So setting F1.2 on lens and on LEA adapter could equalise the auto exposure of the VM and SE versions of my example (VLN 50mm 1.2).

        1. There seems to be some confusion how the aperture settings work
          The aperture setting IN THE CAMERA to f:2.0 is requiered to calibrate the camera’s exposure measurement. It is completely independent of the aperture setting at the lens. The latter one controls the amout of light that gets to the sensor and determines the depth of field. The aperture setting at the lens can’t be transferred to the Exif since manual lenses can’t communicate the f-stopp setting to the camera.
          The only other purpose of the camera-internal f-stop-setting is to program the Techart adapter to a specific focal length (that is later recorded in the Exif and is used to calibrate the IBIS). For this purpose one needs to take ONE shot a the camera-internal f-stop-setting f:2.8 or larger. This is done according to a table that lists f-stops and corresponding focal lengths. After you have done this one shot (and deleted the resulting useless image), the adapter is programmed to this one specific focal length. For the following shooting one needs to remember to reset the camera-interal setting back to f:2.0! The adapter now maintains the programmed focal length setting until you reprogram it by taking again a shot with the camera-internal f-stop-setting f:2.8 or larger.
          The f-stop-focal length table is different from the original one that was used for the LM-EA7!
          I hope this helps…

  4. Regarding the weight limit of lenses: if you do not hold the camera but instead hold the lens and let the camera move, there is no issue… The A7-series is just below 500 gr (unless you attached something heavy to it).
    And this is not theoretical: I have have the old version. Used it many times with the 7artisans 50mm F1.1. But I recently bouth the TT Artisans 90mm F1.25, which is just over 1 kg. And it works, I’ve taken it out for several shoots and it works. On condition that you hold it by the lens, so that it is the camera that moves when focussing…
    And yes, I’ll upgrade. It’s too bulky and noisy the old one…

  5. “Assign a custom button to AF/MF Ctrl Toggle”
    Many thanks for this very useful hint! It also provides a quick work around in case the adapter struggles to find the focus. Than you can just press the button and focus manually.

  6. I noticed worse focusing speed and recognition on the A7R3 than with the LM EA7 and often a lack of the green focus detection frame in case of focus detection.

    Anyone else?

    1. Yes, I must say I made similar observations on the A9. It indeed feels slower than the LM-EA7 and the noise is different but not much quieter. The only advantage I see right now is the less bulky design.
      I hope they will soon launch a firmware update.

  7. One important note:
    The LM-AE9 is NOT compatible to some LTM or M-mount lenses that have the infinity lock button located at the lenses flange level. The LM-EA9’s M mount is a bit recessed and the infinity lock button collides with the rim of the adapter if you try to mount it!
    The list of NOT compatible lenses with the LM-EA9 includes (not sure if it is complete):
    Leitz: Hektor 6.3/28mm, Summaron f:5.6/28mm, Elmar 3.5/35mm, Summar 2.0/50mm (rigid version only), Hektor 2.5/50mm, Elmar 3.5/50mm (LTM versions only, M works!)
    TTArtisan 5.6/28mm, Voigtländer Heliar 2.8/40mm
    This is really a shame…

  8. So far I like it, big improvement over previous version. I’m using it mostly with voigtlander 50 mm apo, and I’m getting so beautiful images.

    I only wish they could have been improved the AF area, it is really small and limited.
    Do you think it will get better with firmware updates?

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