Focus pulsing issue with canon eos r10

[Ilias_laz]

Hello, I was using an old canon eos 50d with a sigma 17-50mm f2.8 ex dc os hsm, and both worked great (this lens is especially sharp). Recently I decided to invest in mirrorless system as I had read that with ef to rf adapter my ef lenses would work great. Unfortunatelly when I am using this lens with r10 I get a massive pulsing issue when I am focusing with servo mode. I am very dissapointed because there was not any list of compatible third party lenses with new mirrorless cameras. Canon just told that ef lenses would work as good as with dslr cameras. Is there a solution to this problem? 

[deebatman316]

I clearly stated that there are limitations with older lenses. So we have partial compatibility with lenses. I don't know of any 1st party EF lens that won't work.