Gripped 5D Mark III + 85mm f1.2L, any improvement in AF speed?

[Hjalmarg1]

I have rented the 85mm f1.2L and its AF turns to be slooowwww, even on my 5D3. I have heard that its AF is a little faster on 1Dx due to higher voltage of the battery.
Have any of you experience any improvement in the EF 85 f1.2L AF speed when adding battery grip?

Thanks

 

[dgatwood]

I have rented the 85mm f1.2L and its AF turns to be slooowwww, even on my 5D3. I have heard that its AF is a little faster on 1Dx due to higher voltage of the battery.
Have any of you experience any improvement in the EF 85 f1.2L AF speed when adding battery grip?

Thanks

Somebody is still renting the original f/1.2L?

Anyway, to answer your question, as I understand it, it's not the battery current, but rather, the battery voltage that makes a difference in the speed of the focusing motors. Adding a second battery in parallel doesn't affect the voltage (or the current, to be brutally honest, because the camera alternates between them rather than actually using them in parallel), so adding a grip should make no difference whatsoever.

 

[sagittariansrock]

I guess this is where subjective opinions differ. I tried the 85/1.2 L II on my 5D classic, and the AF speed seemed to be perfectly acceptable (no, not close to the 135L or the 70-200 II, but expecting that isn't very realistic).

I did try the original 85L on my 5DIII, and it was a lot slower (to the point it didn't seem worth the 1K it seems to command on the used market).

 

[BL]

I just tried AF speed comparison between my 1Dx and 5Dc.

Maybe there's a difference? I dunno, I can't tell, they're both pretty slow going from MFD to infinity.

But for portraits, the AF on mkII is plenty fast enough for me. Even if they released a mkIII that doubled the AF speed, that still wouldn't be reason enough to upgrade.

MFD and LOCA are the shortcomings in my opinion

 

[Dylan777]

I have rented the 85mm f1.2L and its AF turns to be slooowwww, even on my 5D3. I have heard that its AF is a little faster on 1Dx due to higher voltage of the battery.
Have any of you experience any improvement in the EF 85 f1.2L AF speed when adding battery grip?

Thanks

About the same between x vs 5diii in term of speed. Slightly faster maybe but not day night diff. However, I got more keeper with the x at wide open aperture.

 

[Hjalmarg1]

I have rented the 85mm f1.2L and its AF turns to be slooowwww, even on my 5D3. I have heard that its AF is a little faster on 1Dx due to higher voltage of the battery.
Have any of you experience any improvement in the EF 85 f1.2L AF speed when adding battery grip?

Thanks

Somebody is still renting the original f/1.2L?

Anyway, to answer your question, as I understand it, it's not the battery current, but rather, the battery voltage that makes a difference in the speed of the focusing motors. Adding a second battery in parallel doesn't affect the voltage (or the current, to be brutally honest, because the camera alternates between them rather than actually using them in parallel), so adding a grip should make no difference whatsoever.

Many thanks! Looks that there isn't any option to improve its AF speed.

 

[Hjalmarg1]

I have rented the 85mm f1.2L and its AF turns to be slooowwww, even on my 5D3. I have heard that its AF is a little faster on 1Dx due to higher voltage of the battery.
Have any of you experience any improvement in the EF 85 f1.2L AF speed when adding battery grip?

Thanks

About the same between x vs 5diii in term of speed. Slightly faster maybe but not day night diff. However, I got more keeper with the x at wide open aperture.

Hi Dylan,

Thanks for your answer. I was optimistic but the lens elements seems to be too heavy to get faster AF, even with the 1Dx.

 

[mackguyver]

The answer is no. Two 7.4V still output 7.4V as they are wired in parallel not combined to be 14.8V. The 1D X battery is 11.1V in comparison giving 1/3 higher voltage. The grip gives you a lot better balance with the heavy 85L and is great for shooting twice as long and in the portrait orientation, of course.

 

[Hjalmarg1]

The answer is no. Two 7.4V still output 7.4V as they are wired in parallel not combined to be 14.8V. The 1D X battery is 11.1V in comparison giving 1/3 higher voltage. The grip gives you a lot better balance with the heavy 85L and is great for shooting twice as long and in the portrait orientation, of course.

Thanks Macguyver