Meike MK-EFTR-B Metal Auto-Focus Mount Lens Adapter with Control Ring Converter for Canon EF/EF-S Lenses to EOS R and EOS RP R5 R5C R6 C70 Cameras

Funktion und Passform in Ordnung. Aber: Der Akku der R10 wie auch der RP wird über Nacht selbst bei ausgeschalteter Kamera komplett leer gesaugt! Hat mich einige Zeit gekostet, die Ursache herauszufinden. Es liegt eindeutig am Adapter, völlig egal, welche Kombination Kamera/Objektiv.Da es keinen Support gibt trotz Anfrage und das angebliche Firmware-Update - wenn man es denn findet - nur auf Chinesisch vorliegt, für mich nicht verwendbar. Unakzeptabler Service.

bonjourcomme beaucoup ,j'ai le même problème de consommation batterie a cause de la bague,et malgré une réponse du fournisseur pour avoir la mise a jour du micrologiciel,je n'ai toujours pas la façon de procéder pour charger la nouvelle version V 0.7 du micrologiciel de la bague Meike MK-EFTR-B.c'est dommage car a part ça elle fonctionne très bien et le prix est raisonnable .attente procédure chargement sinon renvoie Amazon.

The fit was great, the finish matches the older EF lenses. Can't complain, no issues with battery drain either.

I am VERY happy with this adapter. It lets me use my previous EF and EF-S lenses with my new Canon R8 camera. I've tried this with three different EF lenses (28-105, 28-135 & 70-300) and one EF-S lens (17-85). In every case the lens mounts firmly, with no wiggle or rattling as has been reported for other brand's adapters. All the lenses work well, with the correct lens being reported in the camera menus. It even automatically applies the 1.6 crop for the EF-S lens.The only downside was that the adapter drains the camera battery even when switched off! However, the 0.7 version firmware fixes this. There were no instructions on how to update the firmware (that I could find) so I struggled through this on my own. To save you that effort, this is what I did to install it...1. Go to meike site "mkgrip dot com slash down" and scroll down until you see the two MK-EFTR-B files (see pic). Click to download them both.2. You should now have the two files as follows (at time of writing): Meike MK-EFTR-B_upload_202201_24_202201241845242902.rar (contains EFTR-B update setup files.exe) Meike MK-EFTR-B_upload_202205_16_202205161500391753.rar (contains EFTRB0_V0.7_20220511.sky)Caveat: The following was performed under Windows 10. Things may differ for other versions.3. Extract the two files from the .rar files. The ".sky" file is the firmware, and the .exe is the installer.4. Run the exe file to install the installer. The buttons and screens are all in Chinese, so I had to make intelligent guesses as to what to click (I think it was all the default highlighted ones though). This exe will install two things: a) the firmware installer program (called just "Update"), and b) a USB to serial (COM port) driver5. Using a USB-C cable, connect the Meike adapter to your computer. It should be detected and connected. Run the "Update" program (there should be a link on your desktop). Fortunately, the screens/buttons are in English at this point! :-) Browse to where your firmware file is stored and click the update button. The progress bar should run and finish the install.OR NOT!5b. For me I got an error 4201 (Failed to find the device). I checked with device manager and saw the device was there as COM3, so huh? I rebooted my PC, but that didn't work. So then I went to "Add/Remove Programs" and uninstalled the USB to serial driver that the .exe had installed above. (I already had a previous USB->COM driver for USBtiny Arduino programming, so thought this might be causing a conflict). Sure enough, after the uninstall, I re-ran "Update" and it worked. Yay! YMMV.Good luck!

Costruzione buona ,la possibilità di aggiornare il firmware e ottima la ghiera multifunzione e fluida e precisa ,la guarnizione sull'attacco RF e una finezza in più .uso l'adattatore sulla mia EOS R non ha niente da invidiare da quello originale.

Straight out of box, the adapter drains camera battery (with lens attached). Firmware update v0.7 seems to have corrected this issue. The update software is terrible, buggy interface, look like it’s designed for win 3.11 🙀 and blocked by virus protection…However finally it works without issues 👍

Passt und erscheint wertig.

During the optical inspection of the device, I noticed that one screw is sticking out because it is not screwed in all the way. All the screws were undertightened. I solved that by tightening them properly. The second, much bigger problem is that if I leave the adapter on the camera (with or without a lens, I tested both), it drains my previously fully charged battery completely in two days when the camera is turned off. Therefore, I will be forced to return the adapter. At the same time, I am still waiting for a refund for the same adapter that you did not supply me:https://www.amazon.de/-/en/progress-tracker/package/ref=ppx_yo_dt_b_track_package?_encoding=UTF8&itemId=kmnkmqqtkktnwo&orderId=302-3018843-6544324&packageIndex=0&shipmentId=DNm8nCnrj&vt=YOUR_ORDERS

Costruito con materiali di ottima qualità funziona perfettamente senza intoppi. Unico difetto che ho riscontrato è che la ghiera è troppo "liscia" ha poca trazione. L'avrei preferita a scatti e un po' più duretta peccato altrimenti avrei dato 5 stelle.