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]

First your lens likely isn't capable of 30 fps the lens aperture cannot stop down fast enough for this. Most of Canon's own EF lenses also aren't capable of 30 fps in electronic shutter mode. The AF motor is more than likely not fast enough for that. So the camera will AUTOMATICALLY slow down for the lens if it can't keep up. The lens always focuses between shots and the aperture opens back up in between shots.

[LewisBarrett1]

Although the lens may occasionally struggle at high fps, I can’t get it to focus sharply on the subject before I take the photos, but it never used to do this on my old 1200D 

[deebatman316]

Well that camera was much slower than a mirrorless camera. It was only capable of 4-5 fps. A mirrorless can shoot way more fps than a DSLR ever could. I would also advise that you stop using H & H+ shooting. The lens is NOT COMPATIBLE with it. 

[ebiggs1]

" The lens always focuses between shots and the aperture opens back up in between shots."

The AF system ensures that the focus remains locked on the subject as you shoot at high fps. The electronic shutter does offer full auto focus and auto exposure capability. (perhaps not on the R7 though,I don't have one)

[deebatman316]

This is somewhat true but older EF lenses don’t support regular Continuous High Shooting mode when the fully electronic shutter is being used. So they must refocus between shots and open the aperture back up to wide open. Canon always focuses wide never stopped down. Very old EF lenses with Arc Form Drive AF motors from the early years of EOS. The AF and Aperture control work differently. They AF and stop sequentially instead of doing both actions at the same time.

[LeeP]

Excellent response vis a vis 3rd party. I use 3rd party lenses and Canon lenses. The first uh-oh I had was with a wonderful Sigma wide-angle zoom I got when I I was still shooting film and put in on my R8 Holy Vignetting Batman!. I replaced it with the 15-30mm Canon RF and have been loving life. 

[Waddizzle]

“ I would also advise that you stop using H & H+ shooting. The lens is NOT COMPATIBLE with it. “

Have you checked to see if your shots have a locked AF point?  I agree.  The lens is not fully compatible. 

[LewisBarrett1]

Hi, although the lens probably doesn’t support fast shooting, one One point Af I still struggle to get the initial focus on an aircraft, the camera definitely is recognising that something is there and does track it, just not track it sharply 

[LewisBarrett1]

Yes, I do understand the issue with fast frame rates but it struggles to obtain a good sharp focus for me to even take my photos in the first place 

[deebatman316]

The camera is at the mercy of lens and how fast it can AF and stop down. Between shots it refocuses and the aperture opens back up to wide open to refocus. Once refocused it stops down to the selected aperture and the picture is taken. If the communication speed between the camera and lens are slow. Then everything will slow down due to the lens' slow communication speed.