Test Sony A7R3 + MC11 + Canon 600MM F4 II

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JackiePan Junior Member • Posts: 26
Test Sony A7R3 + MC11 + Canon 600MM F4 II

I am 2 years SONY user and used to be a 10 years Canon user. i already sold all my Canon gears include MC11, Metabones.  In the middle of 2019, I was thinking of telescope lens for birding and wildlife animals.  Later SONY released 200-600 which fits me quite well, but as Canon user before, i was still a bit dreaming 600MM F4. After a few comparison and homework on DPR, I am determined to get SONY native 200-600 for its weight, sharpness and AF speed. I tried at Sony store and it worked quite well on A7R3.

Then something happened, my friend tried to offer his 600MM F4 II as quite a cheap price, he also gave his canon 2.0 TC III as gift. Of course i can't reject it. And i have to say goodbye to 200-600. Two days ago, I got my MC11 ordered from Amazon. i immediately tested it. Here is what I found.

Firmware MC11 1.27(latest)

A7R3 3.01

With no TC,

I tried AF-S, it worked just okay outdoors, i think I can shoot birds on the tree with no issue in daytime. When i tried to AF in low light, it will hesitate. AF area with center focus seemed faster than others.

With AF-C, i tried wide and zone, i found Zone seemed better at tracking. Also in low light or low contrast case, the lens will keep hunting.

With canon 2.0 TC III,

It will take a while for AF focus even it is daylight. In the end, i have to switch to MF which is faster. With MC11 you can't switch MF from camera, have to rely on the lens AF/MF button. i knew Metabone will give MF in the body.

I didn't try AF-C.

With or with out TC, i can't turn on IBIS, saying the lens doesn't support it. I switched IS mode 3 on the lens, there was always some noise in the lens when AF, guessing the IS unit is working.  Maybe with A9, or Metabones V will be better at the performance.


Sony a9
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