EF-M to EF adapter on EOS M6 ii loose. 70-200 can fall off. What can I do?

So a while ago I got an M6 ii. I own a Sigma 18-35 F1.8, was using with a Viltrox EF-M2 speedbooster on my Panasonic cameras, but I was over the crappy autofocus of those cameras, so switched to Canon body to keep using this lens too. Researched the EF-M to EF adapters and settled on the Fotodiox supposedly basically being as good as the official Canon adapter for ALOT less money. The Villtrox EF to M43 Speedbooster on the panasonic...ROCK SOLID. Never loose, never worried. But this Fotodiox adapter on my m6 ii? A tad loose at first. Went to help a friend shoot a wedding as a B-cam guy and slapped his 70-200 on this sucker and it worked great, but I felt the adapter become looser. Eventually, if the lens wiggled just right, the lens + adapter together would fall off the EF-M mount. Like it would rotate like the button was pressed and come off, catching itself on another lip in the mount. Walking with the camera on the tripod then setting it down would cause enough vibration to make this happen, even missed a good shot because the lens + adapter fell off right as I put the tripod down. Not sure what to do and I'm not sure if I should throw money at another adapter, like the Viltrox EF-M to EF adapter.

What do you guys think? Thanks in advance. Clips showing the looseness linked below:

With lens: https://www.youtube.com/watch?v=GhvH0PK52_w

W/O lens: https://www.youtube.com/watch?v=p1Fi3zm_yTY

I have a Viltrox which works fine. However, I also have the Canon OEM adapter. I bought the Canon OEM adapter for heavy lenses like the sigma f/1.8 zoom, just to be sure.  The Canon adapter is also the best for avoiding flair issues.

If you're attaching the combo to a tripod, attach it to the adapter or the lens, NOT the camera. The M cameras aren't designed to be mounted on tripods with heavy adapted lenses.

Look, I'm not a guy who's always buying OEM stuff. Third party options can save a lot of money. But in this case I would go with the Canon adapter. The Viltrox is fine for the 50 f/1.8 stm or the 24 f/2.8 stm or even the 15-85mm f/3.5-5.6 IS USM.

For anything heavier and also front heavier I would get the OEM adapter.

Helgaiden wrote:

Huh interesting. The price of the Canon adapter is nearly unjustifable, I would hope it isn't the fix. Though I see some on ebay for around $110 so maybe. I did have the camera mounted to the tripod directly instead of via the thread on the adapter itself, and I agree this didn't seem to help, but the Smallrig cage I have on the camera blocked me from mounting to the thread on the adapter. I had to remove it. I'll see if i can maybe modify the thing to fit with the cage on still, hopefully. I'm going to contact Fotodiox support and see what they say as well, I didn't think of that. I may also end up trying the Viltrox adapter since its cheap enough at least but we'll see. Thanks for the feedback.

This is a good place.

https://www.mpb.com/en-us/used-equipment/used-photo-and-video/used-lenses/used-canon-fit-lenses/canon-ef-eos-m-mount-adapter/

First, it sounds like you have a bad adapter. Second, any time you have a lens that is bigger/heavier than the body - even if that body is a 5D without any adapters - it is always best to support the combination by the lens. Think of a big lens with body as a lens with body attached, not a body with lens attached. When I shoot with my 70-200 on a DSLR, I always support the weight with my left hand under the lens. If I walk around with that combination hanging from a strap, I always have one hand on the lens. I would do the same with my M6 and anything bigger/heavier than the EF-M lenses.
BUT, you still need to replace your defective adapter.

Helgaiden wrote:

Huh interesting. The price of the Canon adapter is nearly unjustifable, I would hope it isn't the fix. Though I see some on ebay for around $110 so maybe. I did have the camera mounted to the tripod directly instead of via the thread on the adapter itself, and I agree this didn't seem to help, but the Smallrig cage I have on the camera blocked me from mounting to the thread on the adapter. I had to remove it. I'll see if i can maybe modify the thing to fit with the cage on still, hopefully. I'm going to contact Fotodiox support and see what they say as well, I didn't think of that. I may also end up trying the Viltrox adapter since its cheap enough at least but we'll see. Thanks for the feedback.

If budget is tight, get the Viltrox. It works fine in my experience.  I couldn't justify taking a risk mounting heavy and expensive lenses on a third party adapter. YMMV.

m100 wrote:

Helgaiden wrote:

Huh interesting. The price of the Canon adapter is nearly unjustifable, I would hope it isn't the fix. Though I see some on ebay for around $110 so maybe. I did have the camera mounted to the tripod directly instead of via the thread on the adapter itself, and I agree this didn't seem to help, but the Smallrig cage I have on the camera blocked me from mounting to the thread on the adapter. I had to remove it. I'll see if i can maybe modify the thing to fit with the cage on still, hopefully. I'm going to contact Fotodiox support and see what they say as well, I didn't think of that. I may also end up trying the Viltrox adapter since its cheap enough at least but we'll see. Thanks for the feedback.

This is a good place.

https://www.mpb.com/en-us/used-equipment/used-photo-and-video/used-lenses/used-canon-fit-lenses/canon-ef-eos-m-mount-adapter/

I somehow managed to get the OEM adapter for less than $40 on eBay several years back. Since those kinds of prices don't seem to be available anymore, I'd probably go for one of the excellent condition ones on mpb if I were doing it again. Seems worth it for just $30-$40 more than the third party models, and mpb has a great reputation.

To me, the price of the Canon adapter doesn't make any sense - they charge that much because they can. I both one from Commlite for $40 (at Amazon) and it works perfectly well - even with a 70-200 f2.8L IS lens (supported via the lens).

I have bought used 22mm and 18-150mm EF-M lenses from, both in excellent condition for a great price - I have also sold them a bunch of old gear that was just sitting around for many years (the 18-150 was technically a trade, getting money back and the lens).

I recommend checking them out - you can even request something they don't have in stock and get notified when they have one (I did that with the 22mm).

Helgaiden wrote:

So a while ago I got an M6 ii. I own a Sigma 18-35 F1.8,

Very nice lens by the way.  Works like a charm on the M6II.  The 32Mp is better served with this zoom than those tiny ef-m zoom lenses.    And the lens is best served by the sensor of the M6II.

The Original EOS M body shipped with the Lens Adatper in the box - in an attempt by Canon to sell the EOS M as a "backup camera" for professional DSLR shooters.  You can see it on the side of the box in this image from 2012.

.
You asked "what can (you) do" and there's literally but one answer: Get your hands on a genuine Canon lens adapter.  There's simply no alternative...
.
The Viltrox adapters & devices are well known to be horridly loose-fitting. I had a Viltrox tele-tube (not the Lens Adapter) detach with an EF 100mm Macro lens attached to it when I was shooting Macro images with an indoor lighting setup ... almost ruining the lens when it struck the glass table. I was picking the camera up and it literally fell off, even though I'd locked it into place. It was as though I'd pressed the lens-release button. I will not use their products any more. The worst offenders are their EF-to-EF-M adapters. There's plenty of stories about them online producing loosely fitting lenses with poor electrical contacts and a penchant for detaching with larger lenses. You can see just some of the lenses I've adapted to my EOS M + EOS M6 cameras directly below. The snug fit is important.
.

EOS M6 + Canon adapter + EF 100-400mmL II lens

EOS M + Canon Adapter + EF 24mm f/1.4L II USM lens

EOS M + Canon Adapter + EF 50mm f/1.2L USM lens

EOS M + Canon Adapter + EF 100mm f/2.8L USM lens

EOS M6 + Canon Adapter + EF 85mm f/1.2L II USM lens

EOS M6 + Canon Adapter + EF 100-400mmL II lens (with other accessories).

EOS M6 + Canon Adapter + EF 2x III Extender + EF 100-400mmL II lens.

EOS M6 + Canon Adapter + EF 1.4x III Extender + T-Ring + Celestron Mak90 Spotting Scope

EOS M6 + Canon Adapter + EF 1.4x III Extender + T-Ring + Celestron Mak90 Spotting Scope

.
Toss these Viltrox parts into the trash and replace them with a genuine Canon lens adapter. The difference will be night-and-day by comparison. I still use the original Canon adapter that came with my EOS M body (Canon used to supply it in the box back in 2012) and here we are 9 years later and it's on my EOS M6 when needed. It's still tight to get it to connect to the camera EF-M lens mount. These Canon adapters are built tough and will prevent the type of movement shown in your video.
.
There are TWO versions of the Canon Lens Adapter... one has the "foot" included. This can be VERY handy when mounting larger lenses that have no lens ring with their own foot. The other has no "foot" included. The foot is removable (see image below for reference).  And even if you remove the foot to enable various lenses to be fitted without interference, there's yet another tripod-mount on the underside that the "foot" screws into.  I've found the foot useful for mounting a Manfrotto mini-tripod to (see below).  Because larger lenses can sometimes prove tricky to carry.  So with the lens foot attached to the Adapter, there's very litter pressure on the camera mount ring and the lens itself is snugly attached... thus relieving any pressure from the camera mount.  I can walk kilometers holding the rig (below) without much stress on my hand or camera mount.  Both the EOS M and the EOS M6 can be seen below with my favorite EF lens combo on the Lens Adapter...
.

Making use of the Lens Foot that came with my Lens Adapter... by fitting a mini Manfrotto foldup "tripod" solely for the purpose of carrying the camera more securely.

Accessing the M6 battery with the Mini Tripod attached to the Adapter's lens foot.

Top View of the above array.

Stable on a table 1

Stable on a table 2
Canon EF-to-EF-M Lens Adapter with "foot" attached. Canon appear to supply two versions... one with and one without the lens "foot". It is made from metal and has a tripod mounting socket attached.

As usual - excellent advice and photographs. 

Marco Nero wrote:

The Original EOS M body shipped with the Lens Adatper in the box - in an attempt by Canon to sell the EOS M as a "backup camera" for professional DSLR shooters. You can see it on the side of the box in this image from 2012.

.
You asked "what can (you) do" and there's literally but one answer: Get your hands on a genuine Canon lens adapter. There's simply no alternative...
.
The Viltrox adapters & devices are well known to be horridly loose-fitting. I had a Viltrox tele-tube (not the Lens Adapter) detach with an EF 100mm Macro lens attached to it when I was shooting Macro images with an indoor lighting setup ... almost ruining the lens when it struck the glass table. I was picking the camera up and it literally fell off, even though I'd locked it into place. It was as though I'd pressed the lens-release button. I will not use their products any more. The worst offenders are their EF-to-EF-M adapters. There's plenty of stories about them online producing loosely fitting lenses with poor electrical contacts and a penchant for detaching with larger lenses. You can see just some of the lenses I've adapted to my EOS M + EOS M6 cameras directly below. The snug fit is important.
.

EOS M6 + Canon adapter + EF 100-400mmL II lens

EOS M + Canon Adapter + EF 24mm f/1.4L II USM lens

EOS M + Canon Adapter + EF 50mm f/1.2L USM lens

EOS M + Canon Adapter + EF 100mm f/2.8L USM lens

EOS M6 + Canon Adapter + EF 85mm f/1.2L II USM lens

EOS M6 + Canon Adapter + EF 100-400mmL II lens (with other accessories).

EOS M6 + Canon Adapter + EF 2x III Extender + EF 100-400mmL II lens.

EOS M6 + Canon Adapter + EF 1.4x III Extender + T-Ring + Celestron Mak90 Spotting Scope

EOS M6 + Canon Adapter + EF 1.4x III Extender + T-Ring + Celestron Mak90 Spotting Scope

.
Toss these Viltrox parts into the trash and replace them with a genuine Canon lens adapter. The difference will be night-and-day by comparison. I still use the original Canon adapter that came with my EOS M body (Canon used to supply it in the box back in 2012) and here we are 9 years later and it's on my EOS M6 when needed. It's still tight to get it to connect to the camera EF-M lens mount. These Canon adapters are built tough and will prevent the type of movement shown in your video.
.
There are TWO versions of the Canon Lens Adapter... one has the "foot" included. This can be VERY handy when mounting larger lenses that have no lens ring with their own foot. The other has no "foot" included. The foot is removable (see image below for reference). And even if you remove the foot to enable various lenses to be fitted without interference, there's yet another tripod-mount on the underside that the "foot" screws into. I've found the foot useful for mounting a Manfrotto mini-tripod to (see below). Because larger lenses can sometimes prove tricky to carry. So with the lens foot attached to the Adapter, there's very litter pressure on the camera mount ring and the lens itself is snugly attached... thus relieving any pressure from the camera mount. I can walk kilometers holding the rig (below) without much stress on my hand or camera mount. Both the EOS M and the EOS M6 can be seen below with my favorite EF lens combo on the Lens Adapter...
.

Making use of the Lens Foot that came with my Lens Adapter... by fitting a mini Manfrotto foldup "tripod" solely for the purpose of carrying the camera more securely.

Accessing the M6 battery with the Mini Tripod attached to the Adapter's lens foot.

Top View of the above array.

Stable on a table 1

Stable on a table 2

Canon EF-to-EF-M Lens Adapter with "foot" attached. Canon appear to supply two versions... one with and one without the lens "foot". It is made from metal and has a tripod mounting socket attached.

Interesting little "tripod" - just ordered one for $30 from Amazon.

Sue Anne Rush wrote:

As usual - excellent advice and photographs.

Marco Nero wrote:

The Original EOS M body shipped with the Lens Adatper in the box - in an attempt by Canon to sell the EOS M as a "backup camera" for professional DSLR shooters. You can see it on the side of the box in this image from 2012.

.
You asked "what can (you) do" and there's literally but one answer: Get your hands on a genuine Canon lens adapter. There's simply no alternative...
.
The Viltrox adapters & devices are well known to be horridly loose-fitting. I had a Viltrox tele-tube (not the Lens Adapter) detach with an EF 100mm Macro lens attached to it when I was shooting Macro images with an indoor lighting setup ... almost ruining the lens when it struck the glass table. I was picking the camera up and it literally fell off, even though I'd locked it into place. It was as though I'd pressed the lens-release button. I will not use their products any more. The worst offenders are their EF-to-EF-M adapters. There's plenty of stories about them online producing loosely fitting lenses with poor electrical contacts and a penchant for detaching with larger lenses. You can see just some of the lenses I've adapted to my EOS M + EOS M6 cameras directly below. The snug fit is important.
.

EOS M6 + Canon adapter + EF 100-400mmL II lens

EOS M + Canon Adapter + EF 24mm f/1.4L II USM lens

EOS M + Canon Adapter + EF 50mm f/1.2L USM lens

EOS M + Canon Adapter + EF 100mm f/2.8L USM lens

EOS M6 + Canon Adapter + EF 85mm f/1.2L II USM lens

EOS M6 + Canon Adapter + EF 100-400mmL II lens (with other accessories).

EOS M6 + Canon Adapter + EF 2x III Extender + EF 100-400mmL II lens.

EOS M6 + Canon Adapter + EF 1.4x III Extender + T-Ring + Celestron Mak90 Spotting Scope

EOS M6 + Canon Adapter + EF 1.4x III Extender + T-Ring + Celestron Mak90 Spotting Scope

.
Toss these Viltrox parts into the trash and replace them with a genuine Canon lens adapter. The difference will be night-and-day by comparison. I still use the original Canon adapter that came with my EOS M body (Canon used to supply it in the box back in 2012) and here we are 9 years later and it's on my EOS M6 when needed. It's still tight to get it to connect to the camera EF-M lens mount. These Canon adapters are built tough and will prevent the type of movement shown in your video.
.
There are TWO versions of the Canon Lens Adapter... one has the "foot" included. This can be VERY handy when mounting larger lenses that have no lens ring with their own foot. The other has no "foot" included. The foot is removable (see image below for reference). And even if you remove the foot to enable various lenses to be fitted without interference, there's yet another tripod-mount on the underside that the "foot" screws into. I've found the foot useful for mounting a Manfrotto mini-tripod to (see below). Because larger lenses can sometimes prove tricky to carry. So with the lens foot attached to the Adapter, there's very litter pressure on the camera mount ring and the lens itself is snugly attached... thus relieving any pressure from the camera mount. I can walk kilometers holding the rig (below) without much stress on my hand or camera mount. Both the EOS M and the EOS M6 can be seen below with my favorite EF lens combo on the Lens Adapter...
.

Making use of the Lens Foot that came with my Lens Adapter... by fitting a mini Manfrotto foldup "tripod" solely for the purpose of carrying the camera more securely.

Accessing the M6 battery with the Mini Tripod attached to the Adapter's lens foot.

Top View of the above array.

Stable on a table 1

Stable on a table 2

Canon EF-to-EF-M Lens Adapter with "foot" attached. Canon appear to supply two versions... one with and one without the lens "foot". It is made from metal and has a tripod mounting socket attached.

Your experience with Viltrox parts you actually have firsthand experience with is quite the opposite of mine. The Viltrox EF to M43 speedbooster I use on my panasonic is rock solid, and other people, who actually owned the Viltrox EF-to-EFM adapter, here (as well as reddit where I posted this question as well) have thrown their support behind the Viltrox adapter.

I've found at least a contributing cause to the issue I had with my Fotodiox though. The screws in the back of the mount (like the bottom picture in the quoted post) were loose. I tightened them back down and its good again. I may redo the tightening of those screws by adding blue loctite to keep them from backing back out, we'll see.

With all that being said, a previous poster suggested looking at mpb.com and ordering an official canon adapter from there, which I did. I'll keep the Fotodiox for a second lens or as a backup. Am really going to have to try figure out how to get the foot back on the lens for larger lenses though. I couldn't use it with the adapter because it interefered with the smallrig cage I have on the m6 ii.

Really wish Canon still sold the M series cameras with the adapter in there like you showed at the top of your post! That would be great. Considering the overall lack of support the EOS-M mount has gotten, it would have been smart to at least start doing that again once the M50 hit and the M series got popular again.