Canon Community

tgr74 · ‎11-17-2021

Hi all! I recently got the RF85mm 1.2 and I'm using it on the R5 body. I thought it was defective becuase it is CONSTANTLY hunting focus even when I have not half pressed the shutter. It is a loud focusing system so it was really driving me nuts. I thought it was defective as none of my other lenses seem to do this. I did some poking around online and discovered that indeed I did have Continuous AF enabled. SO... All of my lenses must have been doing the same thing but you just don't hear it so it's imperceptible. Here is my question... it seems like a really good thing to have enabled especially when shooting people, but I would assume that even if disabled, when using any of the eye tracking modes those would sort of override the disable and enable it - for that mode. Am I correct to think this, or would enabling it with eye tracking be even better when shooting people? Sorry long winded. Any help is greatly apppreciated! Sorry for typos - typing fast.

Waddizzle · ‎11-17-2021

Test it, and see. I would expect setting it to disable should disable the AF.

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"Enjoying photography since 1972."

Theresek · ‎11-18-2021

I've noticed the same thing with both the RF 35 and RF 50. I've tried different settings and I'm struggling to get them to focus at all. I've had to switch to manual focus during a family photo shoot!

Tronhard · ‎11-26-2021

Have you looked at the menu system to see if Continuous Autofocus is turned on. What you describe would happen if it was. Servo autofocus is what you want, not continuous...

@Theresek wrote:
I've noticed the same thing with both the RF 35 and RF 50. I've tried different settings and I'm struggling to get them to focus at all. I've had to switch to manual focus during a family photo shoot!

cheers, TREVOR

The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris

ebiggs1 · ‎11-27-2021

I don't have the RF 85mm 1.2 but I do have the EF 85mm f1.2L. If the RF 85mm 1.2 is anything like its older brother, and I bet it is, it is a slow focusing lens. Perhaps too slow for good eye tracking AF.

EB
EOS 1D, EOS 1D MK IIn, EOS 1D MK III, EOS 1Ds MK III, EOS 1D MK IV and EOS 1DX and many lenses.

ebiggs1 · ‎11-27-2021

"It is a loud focusing system so it was really driving me nuts."

The EF 85mm f1.2L is not overly loud at least mine is not. Since it is a slow to focus lens maybe it seems louder because you hear it longer.

EB
EOS 1D, EOS 1D MK IIn, EOS 1D MK III, EOS 1Ds MK III, EOS 1D MK IV and EOS 1DX and many lenses.