Review Generic Canon EF mount adaptor

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
This is about a generic (Chinese) electronic adaptor for Canon EF and EF-S mount to Micro 4/3.
I got this adaptor thanks to @LilSebastian from the "Free to good home / karma / pay it forward" thread (https://www.mu-43.com/threads/free-to-good-home-karma-pay-it-forward.109490/).

[Edit - see other photos of the adaptor in the post
https://www.mu-43.com/threads/free-to-good-home-karma-pay-it-forward.109490/post-1425659]


201110_0606.jpg
Subscribe to see EXIF info for this image (if available)


On the side of the box, there is claim for:
  • Exif transmitting
  • Auto-focus support
  • Aperture control
  • IS function
Hence I intend to check these claims with the Canon EF mount lenses that I have...

201110_0605.jpg
Subscribe to see EXIF info for this image (if available)


And I have a few of them, mostly Canon, but also a few Sigma lenses for Canon, and a Tamron 2x teleconverter.

201110_0260.jpg
Subscribe to see EXIF info for this image (if available)


These lenses will be tested with my Lumix GX85 body.
 
Last edited:

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #2
Canon EF 70-300mm f/4-5.6 IS USM

This is the lens I mostly wish to see working with my m4/3 camera as I don't have a long telephoto in this system (longest I have is 100mm), and anything longer than 200mm from Panasonic or Olympus is quite costly...
This is an intermediate level lens for Canon, not as good as the L series, but better than the basic consumer lenses from Canon (such as EF 75-300 or EF-S 55-250). It is a fairly old design that dates back to 2006 (there is now a mark 2 released in 2016), but still quite nice with an OIS that is claimed to be good to 3 stops.

Subscribe to see EXIF info for this image (if available)


Exif transmitting
This works perfectly.
Lens ID and Lens Type according to ExifTool :
EF to M43 70-300mm F4 -5.6
Although this is not the true ID of the lens, it is accurate enough and permits me to correctly identify the lens used.
The aperture and focal length are also properly indicated in the Exif.

Auto-focus support
The auto-focus works well, albeit maybe a bit slower than on a Canon body. In some occasions it hunts a bit but eventually hits the target. The accuracy is good - one one shot it missed the target, but this was probably my own fault...

One slight annoyance is the lens keeps on focusing even when I don't press the button... I might need to turn the switch to MF and back to AF to take the photo - I'll see on usage.

Aperture control
Again, this worked flawlessly. The camera knows the correct maximum aperture for all focal lengthes. The exposure is accurate.

IS function
I have tried lens OIS by itself, IBIS by itself, and both combined, and all worked, permitting shooting at 300mm FL with a speed of 1/50s handheld without perceptible blur. If anything, it seems to me the lens OIS is slightly more effective than the IBIS.

Conclusion
All claims from the manufacturer are satisfactorily met. I am quite pleased...

Here are a few shots, all handheld at 1/50s, F5.6. The target is the size of a big apple, and shot from a distance of about 5 meters. I tried to make the focus on the stem and leaves.

200mm, Auto-focus, and lens OIS

Subscribe to see EXIF info for this image (if available)


200mm, manual focus and OIS combined with IBIS

Subscribe to see EXIF info for this image (if available)


300mm, auto-focus and lens OIS. Here the focus is a bit too close, but this is probably me that didn't aim at the right spot...

Subscribe to see EXIF info for this image (if available)


300mm, manual focus, IBIS

Subscribe to see EXIF info for this image (if available)
 

ac12

Mu-43 Hall of Famer
Joined
Apr 24, 2018
Messages
2,994
Location
SF Bay Area, California, USA
Glad it worked.

Unfortunately for me, Nikon lenses will NOT talk to m4/3, so the Nikon lenses are FULLY MANUAL. At least that was the case when I looked for a Nikon to m4/3 adapter. So I can't practically use most of my Nikon lenses. I only use my OLD manual focus lenses.
 

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #4
Sigma AF 30mm f/1.4 EX DC HSM (Canon EF mount)

Of all my lenses, this one is probably the closest one to PRO quality. It is big and heavy and designed for APS-C sensor size. It mounts on a FF Canon body, but the image is much smaller than the sensor, resulting is heavy vignetting. I am not too sure when it was released, but it is now discontinued, having been replaced by the ART series from Sigma.

Subscribe to see EXIF info for this image (if available)


This FL being slightly longer than "normal" and the wide aperture make it a good candidate for a portrait lens. However for my part, I mostly do portraits of apples (rather than of people). So the wide aperture is not so useful since I like to have a lot of depth of field for maximum precision of details. I also usually use a tripod (and it is a good idea considering the size and weight of the lens).

Exif transmitting
Lens ID and Lens Type according to ExifTool :
EF to M43 30- 30mm F1.4-1.4
Again this is accurate enough and permits me to correctly identify the lens used.
The aperture and focal length are properly indicated in the Exif.

Auto-focus support
The auto-focus works well. Actually, I have had some problems with this lens on Canon bodies as it often focused too short. Not anymore here, and it focuses tack on target. So I could say it actually works better on my Lumix camera than on a Canon body!

And again as with the previous case, the lens keeps on focusing even when I don't press the button.

Aperture control
This worked flawlessly. The camera knows the correct maximum aperture and the exposure is accurate.

IS function
This lens has no IS... But the IBIS should work OK (I haven't really tested).

Conclusion
All is fine. This will become my #1 lens for apple portraits...

A few shots of Rubinette apples... Focus is done at the base of the stem on the apple on the right.

At F1.4, it is a bit soft but this is characteristic of this lens. Also, contrast and color not as good as when closed a bit. Auto-focus.

Subscribe to see EXIF info for this image (if available)


At F4.0, it is tack sharp. Manual focus.

Subscribe to see EXIF info for this image (if available)


At F5.6, Auto-focus. Great rendering, very sharp, nice contrast and color.

Subscribe to see EXIF info for this image (if available)
 

Petrochemist

Mu-43 All-Pro
Joined
Mar 21, 2013
Messages
1,295
Location
N Essex, UK
Real Name
Mike
I've heard AF adapters can be tricky working OK with some lenses but only as a dumb adapter for others. Having both Canon & Sigma lenses work is a good sign!
I only have two very low quality EF lenses (film era budget kit lenses with issues) but if a cheap AF adapter works well I might be tempted to invest in some better ones :)
 

BDR-529

Mu-43 Veteran
Joined
Jun 27, 2020
Messages
385
Thanks for the test. I have the very same Canon EF 70-300mm f/4-5.6 IS USM but I have never tried to adapt that to MFT body because it doesn't have manual aperture control (just like every other EF lens I still have) and therefore it would be practically useless with 10€ mechanical adapter.

Previously the only AF adapters like Kipon I have seen were in well over 200€ price range and I didn't want to try no-brand chinese contraptions from eBay because I had never heard anyone confirming that they even work. It's interesting to hear that adapter is even able to feed enough power for IS to work.

Maybe I'll take the risk and try one of those 55€ "adaoters" (that's what it says on the box) too. Unfortunately I already have native m4/3 lenses which cover everything from 12mm to 200mm (+macro) so this would be just for the occasional moon shot at 300mm or something like that. Even at 55€, price for every shot I might ever take would end up being substantial but hey, it's only money.
 
Last edited:

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #7
I had been lurking at those for a while, balancing between a Viltrox or a generic, and not being sure how it would perform always made me hesitate. It is only when I saw it offered here that I thought this was the occasion to get one without risking much.

Today I intend to test my 50mm f/1.8s - I have the Mk2 and the STM.
 

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #8
Canon EF 50mm f/1.8 II
and
Canon EF 50mm f/1.8 STM

These two are extremely popular prime lenses from Canon, they are sharp, relatively fast, and very inexpensive...
I got the Mk2 in 2009, with my first ILC digital camera, a Rebel XTi / 400D, and it has been used quite a bit. And when Canon released the improved STM version in 2015, it didn't take long before I got one.

The Mk2
Subscribe to see EXIF info for this image (if available)


The STM
Subscribe to see EXIF info for this image (if available)



Exif transmitting
Lens ID and Lens Type according to ExifTool is the same for both lenses:
EF to M43 50- 50mm F1.8-1.8
The aperture and focal length are properly indicated in the Exif.

Auto-focus support
With the Mk2 lens, Auto-focus does not work properly. When it works, it is extremely slow, and after a shot or two, it stops completely. In practice, only manual focus is possible with this lens.
With the STM, Auto-focus works perfectly. From what I can judge, it is just as fast and accurate as when the lens is used with a Canon body.

Aperture control
This worked flawlessly. The camera knows the correct maximum aperture and the exposure is accurate.

IS function - not applicable with these lenses

Conclusion

It is disappointing that the Mk2 lens doesn't autofocus as this lens is so inexpensive on the used market.
The STM however could be an interesting alternative at lower cost compared to the Oly 45mm or the Pana 42.5mm.

A few shots...

With the Mk2, this is the only shot I succeeded in Auto-focus...
Subscribe to see EXIF info for this image (if available)


Mk2 lens in manual focus
Subscribe to see EXIF info for this image (if available)


STM lens, Auto-focus
Subscribe to see EXIF info for this image (if available)


And another in Auto-focus with the STM
Subscribe to see EXIF info for this image (if available)
 

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #9
The "pancake" lenses
Canon EF-S 24mm f/2.8 STM
and
Canon EF 40mm f/2.8 STM

I got these two lenses to go with the Rebel SL1 / 100D, making an extremely small and light photography package for travelling. When released, the SL1 was the smallest and lightest APS-C DSLR - and I think it still is... One of the pancake lenses was on the camera, and the other in my jeans backpocket, and these two permitted to cover most situations I wanted to shoot.

The 24mm
201112_0275.jpg
Subscribe to see EXIF info for this image (if available)


and the 40mm
201112_0274.jpg
Subscribe to see EXIF info for this image (if available)


Exif transmitting
Lens ID and Lens Type according to ExifTool:
24mm : EF to M43 24- 24mm F2.8-2.8
40mm : EF to M43 40- 40mm F2.8-2.8
The aperture and focal length are properly indicated in the Exif.

Auto-focus support
Auto-focus works perfectly with both lenses. From what I can judge, it is just as fast and accurate as when the lenses are used with a Canon body.

Aperture control
This worked flawlessly. The camera knows the correct maximum aperture and the exposure is accurate.

IS function - not applicable with these lenses

Conclusion
All is fine with these 2 lenses.
 
Last edited:

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #11
Tamron-F 2X AF Tele-Converter (EF mount)

This is a pretty old auto-focus enabling teleconverter that used to work fairly well with my first Canon APSC camera (Rebel XTi / 400D) and old technology lenses such as the EF 50mm-1.8 mk2, but failed to focus properly with newer cameras. Hence I stopped using it... Will it get a second life adapted on M4/3?

Although this is claimed to be 2x, in fact I have tested it to really be a 1.85x converter.
It does transmit the electric signals from body to lens, but has no chip, and the information transmitted by the lens such as aperture and focal length are taken as is by the camera. Hence if the Exif says 100mm and F4.0, in reality the picture was taken at 185mm and the true aperture was F8.0.

190901_3838.JPG
Subscribe to see EXIF info for this image (if available)


I have tested it with two lenses which are in my opinion the most sensible candidates to use with a teleconverter.

With the EF 70-300 F4-5.6 IS USM, to get a really long telephoto (555mm, equivalent to more than 1100mm in 35mm).

201110_0266.jpg
Subscribe to see EXIF info for this image (if available)


and with the EF 50mm F1.8 STM to obtain a 92mm F3.5.

201112_0286.jpg
Subscribe to see EXIF info for this image (if available)




Exif transmitting
Lens ID and Lens Type according to ExifTool is the same as for the the lens without teleconverter
The aperture and focal length are indicated in the Exif as if there was no teleconverter.

Auto-focus support
Auto-focus worked actuelly better than on recent Canon bodies.
With the telephoto it was a bit slow but actually nailed the subject quite accurately. Sometimes on first try it was off, but on a second try it nailed it.
With the 50mm, autofocus was fast but always missed the subject although the familiar "on focus" noise was emitted. Hence not usable other than on manual focus.

Aperture control
This worked OK, the exposure is accurate.

IS function
I was a bit worried for the IBIS as the focal length known to the camera is uncorrected, but apparently this is not an issue. I was able to take hand held shots with the long telephoto that do not show any blur.

Conclusion
Mixed result here... I might use it on the telephoto for the odd occasion where I need the reach.

Example shot with the telephoto, 335mm (converted). It is a bit soft when looking at it at 100%, but I think this is inherent to the converter... This was with auto-focus.

201113_0735(T2x).jpg
Subscribe to see EXIF info for this image (if available)
 
Last edited:

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #12
Miscelaneous other lenses (which I am not likely to use as adapted lenses on micro 4/3 - but since I have them, might as well check how they work...)

Sigma 24mm f/2.8 Super Wide II (EF-mount)

Canon EF 35-105mm f/3.5-4.5

Canon EF-S 18-55mm f/3.5-5.6 IS STM


The Sigma 24mm is an old design dating back to the 90s, and a fairly uncommon lens that was my normal prime lens on the Rebel XTi / 400D, and I have used it a lot. This kit also included the EF 50mm-1.8 mk2 as short tele. I stopped using the Sigma 24 when I got the Canon 24mm STM which was lighter with faster focus, but started using it again as a proper wide angle prime when I got the EOS 5D mk2 camera which is full frame.

201113_0291.jpg
Subscribe to see EXIF info for this image (if available)


The EF 35-105 is a true vintage lens, one if the first EF lenses released by end of the 80s, and one of the very few EF zooms to feature a push-pull zoom. It was quickly replaced by a more modern (but not as well built and slower) equivalent with a rotating zoom ring. This is a very nice lens, well built and fun to use on a FF camera. However since I have a P 35-100mm, I am not likely to use this in micro 4/3.

201113_0294.jpg
Subscribe to see EXIF info for this image (if available)


The EF-S 18-55 is the kit lens that came with the Rebel SL1 / 100D when I bought it. I never used it much, as I always preferred to use the pancake primes with this camera. It is not a bad lens, but no point using it on Micro 4/3 as there are equivalent kit zooms which are much smaller.

201113_0296.jpg
Subscribe to see EXIF info for this image (if available)


Exif transmitting
Lens ID and Lens Type according to ExifTool:
For the Sigma 24mm : EF to M43 24- 24mm F2.8-2.8
For the EF 35-105, the aperture wasn't correctly reported and I got the following: EF to M43 35-105mm F4 -4
(It should have been EF to M43 35-105mm F3.5-4.5)
For the EF-S 18-55, again the aperture wasn't correctly reported and I got the following: EF to M43 18- 55mm F4 -4 on some shots taken at F4, and EF to M43 18- 55mm F5.6-5.6 on shots taken at F5.6, so apparently it reports the aperture at which the shot was taken.
The aperture and focal length are properly indicated in the Exif.

Auto-focus support
Sigma 24mm - Auto-focus doesn't work at all.
EF 35-105 - Auto-focus extremely slow, but eventually nails the target.
EF-S 18-55 - Auto-focus fast and accurate.

Aperture control
This worked OK, the exposure is accurate.

IS function
Only the EF-S 18-55 has IS, and apparently this worked properly.
 
Last edited:

cjoliprsf

Mu-43 Regular
Joined
May 28, 2019
Messages
189
Location
Quebec, Canada
Real Name
Claude
  • Thread Starter Thread Starter
  • #13
Summary

All in all, this adaptor works much better than I had expected. If I had known it would work that well, I wouldn't have hesitated to buy one.

So let's review the main functions:

Exif transmitting
Lens ID and Lens Type according to ExifTool is in general accurate and helpful to identify the lens used.
Only exception is with 2 zoom lenses for which the maximum apertures weren't properly indicated.
In all cases, the aperture and focal length for the shot are properly indicated in the Exif.

Auto-focus support
Old technology lenses dating back to film era (90s) did not auto-focus properly, and are pretty much limited to manual focus.
USM lenses apparently auto-focus properly (from the one such lens that I could test).
Recent STM lenses seem to auto-focus just as rapidly and accurately as on a Canon body.

Aperture control
This worked OK in all cases, the exposure is accurate.

IS function
I didn't do systematic testing for IS, but apparently the lens IS worked properly in all cases, and also camera IBIS also worked properly. There was no issue when both lens IS and IBIS were simultaneously on.

Conclusion
I am quite pleased with this adaptor, it will make a nice addition to my kit. I am most likely to use it with my 70-300 teleZoom, with my Sigma 30mm-1.4 for its wide aperture and great rendering, and with my 50mm STM, saving me the buying of an O45 or P42.5 which I had been GASing for recently... I will probably use it also with my 24mm STM to make a normal prime.
 

Latest posts

Links on this page may be to our affiliates. Sales through affiliate links may benefit this site.
Mu-43 is a fan site and not associated with Olympus, Panasonic, or other manufacturers mentioned on this site.
Forum post reactions by Twemoji: https://github.com/twitter/twemoji
Copyright © 2009-2019 Amin Forums, LLC
Top Bottom