EOS R7 or 3rd party adaptor causing softness?

[LewisBarrett1]

I recently just bought a used Canon R7 from MBP, I've been using a 3rd party Meike EF-RF adaptor and my Tamron 70-300mm SP f/4-5.6 Di VC USD
I've never had issues before with this lens on my old canon 1200D dslr but only 5-10 photos out of the over 350 i took today were in focus, ill place a link to a drop box with just a few C-RAW photos from my R7

Im wondering if its a defective R7 or if its a problem with my 3rd party adapter?

I know the photos are shocking, but I needed good examples. 90% of my photos were ALL like this

[deebatman316]

The adapter has no optics in it all it does is put the lens at the correct distance from the image sensor. If an EF lenses is mounted the camera will use EF Mount communication. The adapter doesn't change communication protocols from RF to EF. 3rd Party Mount adapter cause nothing but trouble such as locking up cameras or draining batteries. Also we can't see your pictures. 3rd Party lens compatibility IS NOT up to Canon but to the 3rd Party manufacturer. Older EF Mount lenses from 3rd Party manufacturers often have some compatibility issues with EOS R series cameras. A lot of older lenses have issues with IS and often have issues like "IS Tug of war" with the AF system. Or even fight with IBIS if the camera has it. The only way to stop those issues is to turn off lens IS. But then IBIS doesn't work you have to use both IS and IBIS its not 1 or the other.

[Waddizzle]

I don’t see a sample photo. 

The problem is most likely your 15+ year old lens.  it probably too slow to focus and can’t keep up with the camera’s high frame rates. 

When you play back photos in the camera, is it able to display locked AF points. 

The lens was designed for DSLRs with much lower frame rates when you are using Continuous drive mode. Your 1200D is barely capable of 4-5 fps.  The R7 is capable of 30 fps.

Forget about trying to use subject detection and eye tracking with an old lens. It can barely keep up with the mechanical shutter, assuming that it can refocus at 12 fps. 

And the third party mount adapter doesn’t help matters, either.  Invest in an RF lens. 

[shadowsports]

Greetings,

Agree with Demetrius and Waddizzle.  The learning curve with mirrorless is much lower than some make it out to be.  Mirrorless does what your DSLR did, just better, faster and with less effort.  I own the Canon EF to EOS R adapter, but only used it for about 2 weeks.  I migrated to RF quickly.  Meike is probably the only 3rd party adapter I might consider behind Canon, which would be my first choice.  Softness could be technique, but its more likely the lens.  I don't care for Tamron glass personally, so i don't follow it as closely as Sigma.  You might want to check if upgraded firmware is available.  I tried , but without (rev) of your lens, I could be sure.  They have a "Silver Ring" tungsten edition (A030) that has an update.  

It might be worth considering an RF 70-200 f2.8 or f4.  😀  Up to you.  

[LewisBarrett1]

Hi thanks for the reply, sorry for the samples not working I have an updated link where I took samples at 1/640 and F.8 on stationary objects at 300mm, had no issues with the autofocus and at the bottom of the list you can see my photos that were not on focus 
https://imgur.com/a/frmCuba

[LewisBarrett1]

Hi, i took some sample photos with the same lens at 300mm on stationary objects and had no issues as you can see, my aviation photos are listed at the bottom
https://imgur.com/a/frmCuba

[ebiggs1]

"The problem is most likely your 15+ year old lens. ". and was not a great lens even then. You can do better and you  should for your new R7.

[Waddizzle]

“ …I took samples at 1/640 and F.8 on stationary objects at 300mm, had no issues with the autofocus… “

I am certain the images were in focus.  But. There is a world of difference between focusing on a stationary object versus maintaining focus on a moving object. 

The lens seems capable of refocusing on a moving object several times per second.  But it is not capable of refocusing on a moving subject dozens of times per second. 

Again, are you able the locked AF point in your images. If you don’t know how to display them, then say so. Checking your AF point should be one of the first steps to take when you have a soft image. 

[jrhoffman75]

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@LewisBarrett1 wrote:

Hi, i took some sample photos with the same lens at 300mm on stationary objects and had no issues as you can see, my aviation photos are listed at the bottom
https://imgur.com/a/frmCuba

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From this suite of photos the only one I consider unacceptable is the plane in the air. It is a very small area of the frame and I wouldn't make judgements relative to a problem with this one data point. It could be a focus problem. It could be that your focus point wasn't on the aircraft. It could even be atmospheric issues.

[LewisBarrett1]

Even if I use One shot autofocus where it is not having to track and update the autofocus, the lens wont even focus correctly in the first place, that's the issue, I can reliably shoot fast moving vehicles with the R7 at 30fps on electronic and the same lens when they are close and the lens does not struggle to track in the slightest.