R5, Error 70, EF to R Lens Adapter

I have the 100-400II, 1.4x iii, I used them on R5 together with other EF and RF lens.

No sequence of mounting EF-RF ring on lens first or on the body, who can remember?

It's even more complicated when you have two rings, adaptor and extender.

I just anyhow mount them, no priority, no sequence, and even no power off.

And I have 2 3rd party and 1 original batteries.

My R5 has never locked up.

Mike-G wrote:

My 7D II bit the dust last week, so I purchased an R5 5 days ago. I'm using it with the EF 100-400 ii and an EF 500/f4 ii and the basic Canon EF to R adapter. I also have the 1.4 iii TC, but I haven't used it with this body yet. Cards are Delkin Power 128 GB CFE and Sony Tough 64 GB UHS II, which are formatted.

The first 3-4 days I encountered 8 or 9 lock-ups/freezes with 4 of them indicating the dreaded Err 70 message. Pulling and reinserting the battery fixed all of them.

AF methods were Animal Eye AF, Zone and Spot using electronic shutter (God, I love the silence!). I encountered the freezes using all three AF methods and with both cards. The first lock-up occurred early on my first shoot, and subsequent problems happened during both heavy and light use.

I called Canon Support yesterday, and the rep told me that it would have to go back to Canon for a fix and recommended that I try to exchange it for one at the shop where I bought it. OK, no problem, but I went through everything one more time to make sure I wasn't doing anything stupid.

When I first set the camera up, I placed the adapter on the body and then attached the lens to the adapter. Yesterday I finally decided to read the adapter instructions, which says to attach it to the lens and then to the body. I took everything apart and attached them per the instructions. I took 1200 pictures last night and today and no lock-ups or Error 70 messages.

Could the adapter/lens/camera attachment order be the culprit, or is it a "mainboard" malfunction that will plague this camera forever?

Thanks.

Otherwise so far, so good with the camera. Battery life is much better than I anticipated, the sleepy EVf poses no problem since I always press a focus button when bringing the camera to my eye, and the AF seems good for BIF, although I haven't had any challenging situations yet (will Zone or Animal Eye work for Terns, Red-Winged Blackbirds, or Swallows? No idea, I guess I'll find out next spring). The much-ballyhooed Animal Eye AF is OK, but it certainly has its limitations as I expected. I can see where it's really useful for composition purposes under the right conditions. Fortunately I used Spot AF on my old camera extensively, so I'm not getting my panties in a twist over the Eye AF misfires. The rest of the camera seems solid and takes nice pictures. Fingers crossed.

Not mentioned in the previous threads:

Did you check/update the firmware for the R5 and the lenses? Some EF lenses have had firmware updates to increase their compatibility with the R- system.

Thank you, everyone for your very helpful replies and experiences with the R5. I used the LP-E6NH that came with the camera, and although I make plenty of bonehead mistakes, I always remember to turn the camera off before swapping lenses, TCs, batteries, etc. The only step I missed was downloading the updated driver for the 100-400 II lens, but I've been using the EF 500 f/4 almost exclusively for outdoors shooting. The Error 70 occurred this morning again.  I exchanged the body at the shop where I bought the camera, and took almost 300 shots at my deck feeder this afternoon without any issues. Shooting through two panes of glass kills a lot of details, but the pics turned out fine considering the glass and low light. Hopefully everything goes OK. The more I use this camera, the more I like it.

Thanks again.

Here's some information that you may find interesting, but won't necessarily help you.

I shoot Timelapse's professionally so I rack up a lot of images per session and when using the Canon EF to RF adapter I will get the ERROR 70 during almost every Timelapse I shoot - BUT this doesn't happen if I shoot with the aperture of the lens wide open.    I have repeated this problem time and time again with a variety of lenses (Canon EF 50mm F/1.4, Sigma EF 20mm f/1.8, Rokinon EF 14mm F/2.8 AF, Sigma EF 150-600mm Contemporary lens) and with Canon batteries (LP-E6NH, LP-E6N) and a variety of media (SDXC from SanDisk and Transcend - and CF Express 2.0 Type B from Sony and Delkin).

It usually takes 170+ frames before the error 70 occurs and sometimes doesn't happen until a much higher frame count (240, 310, etc) - but if I let the camera keep shooting sequentially (Timelapse mode) it WILL happen every time.

There seems to be a communication issue between the camera, adapter and camera when it comes to the opening and closing of the aperture.   Once the camera gives an error 70 it hasn't actually died.   If I keep the camera on (remember, it's in Timelapse mode), it will continue to shoot but it takes 36 seconds for it to do so between shot once the error 70 happens.   Despite Canon's claim that the ERR 70 is a read/write issue.   All images written to the card even after the ERR 70 appears are all written to the card without issue.

So in this scenario, I have the camera set up to shoot an image every 2 seconds.   Every thing is fine until it's not - but once the ERR 70 appears - the camera waits 36 seconds and continues to shoot another frame.  The ERR 70 will now appear after each shot (since the camera wasn't restarted) and will continue to shoot every 36 seconds until I shut the camera off.

Initially I thought maybe as the battery drains it has less power to give to the adapter, but I don't believe this is the case because if I shut the camera off and turn it back on again - the camera will once again shoot a Timelapse without any issues until about 170-180 frames or higher.

The reason it dawned on me that this doesn't happen when shooting wide open is because I do a lot of astrolapses where I always shoot wide open - and never has the camera locked up.  So I did many tests and sure enough if I shoot at the lens's maximum aperture (f/1.8, 2.8, etc) the camera will never give me the ERR 70.

Okay, so maybe a bad adapter.    So I ordered a new Canon EF to RF adapter as well as ordered a native RF lens (I didn't own one until now).   I first tested the camera with the native RF lens and the ERR 70 NEVER appeared regardless of aperture setting.  Next I ran a series of tests using the new EF to RF adapter and Sure enough it exhibited the same problem as my original EF to RF adapter.  Eventual ERR 70 when using a stopped down aperture setting and no ERR 70 when shooting wide open.

This also might explain the randomness of ERR70 for some photographers and not others.  Many photographers that use burst mode are often shooting wildlife - are often shooting at the wide aperture setting in order to let in enough light.   Plus you need to shoot enough images before it shows up.

I have noticed one thing that "may" indicate something isn't right and that's when turning on the EOS R5.   If I have an EF lens and adapter connected to the camera when turning the camera on - it sometimes takes 3-4 seconds before the camera actually turns on.  When this happens it's a guarantee that the ERR 70 will appear during my Timelapse.    If the camera turns on immediately after moving the switch to ON - then I used to think the ERR 70 won't appear - but I'm not so sure about that now.

rmexpress22 wrote:

Are you using the LP-E6NH battery? I had lockups with a third-party adapter and a generic LP-E6 battery but none since I got the Canon adapter and I use only the LP-E6NH batteries now. I think it had to do more with the adapter in my case.

thank you thank you
You solved one of my biggest problem with the R7,
that is the ERROR 70 using older batteries for the DSLR.
Now its TOTALLY RESOLVED.
phew.
I would NEVER have figured it out on my own.

Thank you Mike. Same experience here, except the R5 can have error 70 for uptil 2 hours before it starts taking photos again in time-lapse mode. Canon EF or Tamron EF to RF with Canon adapter is the same. Internal or external power the same result. Have ordered the Meike drop-in adapter for test. 
Did you perform the same tests with RF optics?