Adapting Canon EF Lenses to RF Body

[MrDeadpool]

I recently got an EOS R8, the specs on the EOS R8 features a class-leading autofocus system. It shares almost every spec with the EOS R6 Mark II.
so being that both are RF Mount Full Frame, Mirrorless Cameras. Most comparisons say that the R8 Auto Focus is Fast and Accurate as a Camera twice it's price.
So, what do you loose when you "Adapt" an EF Lens that are made for Canon APS-C Cameras to the EOS R8.

 

[RAZKY]

I recently got an EOS R8, the specs on the EOS R8 features a class-leading autofocus system. It shares almost every spec with the EOS R6 Mark II.
so being that both are RF Mount Full Frame, Mirrorless Cameras. Most comparisons say that the R8 Auto Focus is Fast and Accurate as a Camera twice it's price.
So, what do you loose when you "Adapt" an EF Lens that are made for Canon APS-C Cameras to the EOS R8.

I know little about Canon, but Nikon has a similar adapter, and there is no loss of performance - Canon should be at least as as good (if not better!).

 

[Golem]

I know little about Canon, but Nikon has a similar adapter, and there is no loss of performance - Canon should be at least as as good (if not better!).

Youve ignored the OPs mention that the adapted lens is for APSC. The loss will not be in IQ but in MP count, compared to a proper FF lens.

IOW what you lose is the use of some portion of the area of the FF sensor. That portion is about 35% (with Canon).

 

[zombiesniper]

Canon EF lenses are full frame lenses. EF-S lenses are apsc lenses so they should work fine.

 

[petrochemist]

I've used APSC lenses on my FF Sony A7ii. The body can auto crop to the smaller sensor size, but if this option is turned off some of my crop lenses get close to covering the full sensor.
I gather Nikon systems behave in a similar fashion, so there's a good change Canon will too.

 

[Golem]

I've used APSC lenses on my FF Sony A7ii. The body can auto crop to the smaller sensor size, but if this option is turned off some of my crop lenses get close to covering the full sensor.
I gather Nikon systems behave in a similar fashion, so there's a good change Canon will too.

Unfortunately, Sony does NOT call the tune for Canon and Nikon.

I use my Nikkor DX 10-24 on Sony rather than on Nikon Z. (Nikon SLRs do not have the problem, but the Z6/7 have no user choice about FX/DX crop).