Yongnuo YN585EX AF Assist

RoccoStiglitz · 08-18-2017, 04:54 PM

YN585EX on a K-1. I can't seem to get the AF assist beam to work. Speedlight FN menu 2 AF set to ON and camera set to AF-S per yongnuo instructions. Don't see any in camera settings for accessory AF lights.

Anyone with this combo have any problems getting the AF assist to work?

Last edited by RoccoStiglitz; 08-18-2017 at 05:00 PM.

**BWG** · 08-18-2017, 08:04 PM

Originally posted by RoccoStiglitz

YN585EX on a K-1. I can't seem to get the AF assist beam to work. Speedlight FN menu 2 AF set to ON and camera set to AF-S per yongnuo instructions. Don't see any in camera settings for accessory AF lights.

Anyone with this combo have any problems getting the AF assist to work?

It has to be very dark for it to kick on. The camera's low light focusing is pretty good without the af assist.

rawr · 08-18-2017, 08:27 PM

Originally posted by RoccoStiglitz

Anyone with this combo have any problems getting the AF assist to work?

It's not just that combo. The flash AF assist beam rarely seems to work with any recent third-party flash, be it YN, Metz or any other brand.

RoccoStiglitz · 08-20-2017, 10:54 AM

Originally posted by rawr

It's not just that combo. The flash AF assist beam rarely seems to work with any recent third-party flash, be it YN, Metz or any other brand.

That's a bummer.

1434 · 11-20-2017, 10:52 AM

I can confirm the AF focus assist light failure on the 585EX as well.

It was one of the main things I was excited about with this flash, and it absolutely refuses to function whatsoever.

So far, the YN585EX is naturally a much better fit onto a Pentax body than the made for Canon YN560IVs I have. PTTL seems to work, just as long as you like your photos bright as hell. Not overblown mind you, but just bringing you right to the edge. Shame about the focus assist. I find that my K1 is slow to focus even in the best of conditions.

Mercifulfate · 12-28-2018, 12:39 PM

Originally posted by 1434

I can confirm the AF focus assist light failure on the 585EX as well.

It was one of the main things I was excited about with this flash, and it absolutely refuses to function whatsoever.

So far, the YN585EX is naturally a much better fit onto a Pentax body than the made for Canon YN560IVs I have. PTTL seems to work, just as long as you like your photos bright as hell. Not overblown mind you, but just bringing you right to the edge. Shame about the focus assist. I find that my K1 is slow to focus even in the best of conditions.

Came across this doing some reading. From what I understand the AF issue was fixed with the firmware update of the flash.

superdelsol · 06-18-2019, 08:53 PM

I just bought a used YN585EX and the first thing I did was download and update the firmware to version 16-18. I can confirm that the YN585EX AF assist works with my K-r.

08-18-2017, 04:54 PM	#1
RoccoStiglitz Forum Member Join Date: Mar 2017 Photos: Gallery Posts: 76	Yongnuo YN585EX AF Assist YN585EX on a K-1. I can't seem to get the AF assist beam to work. Speedlight FN menu 2 AF set to ON and camera set to AF-S per yongnuo instructions. Don't see any in camera settings for accessory AF lights. Anyone with this combo have any problems getting the AF assist to work? Last edited by RoccoStiglitz; 08-18-2017 at 05:00 PM.

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08-18-2017, 08:04 PM	#2
BWG Loyal Site Supporter Join Date: Feb 2007 Location: Monterey County, California Posts: 165	Originally posted by RoccoStiglitz YN585EX on a K-1. I can't seem to get the AF assist beam to work. Speedlight FN menu 2 AF set to ON and camera set to AF-S per yongnuo instructions. Don't see any in camera settings for accessory AF lights. Anyone with this combo have any problems getting the AF assist to work? It has to be very dark for it to kick on. The camera's low light focusing is pretty good without the af assist.

08-18-2017, 08:27 PM	#3
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by RoccoStiglitz Anyone with this combo have any problems getting the AF assist to work? It's not just that combo. The flash AF assist beam rarely seems to work with any recent third-party flash, be it YN, Metz or any other brand.

08-20-2017, 10:54 AM	#4
RoccoStiglitz Forum Member Join Date: Mar 2017 Photos: Gallery Posts: 76 Original Poster	Originally posted by rawr It's not just that combo. The flash AF assist beam rarely seems to work with any recent third-party flash, be it YN, Metz or any other brand. That's a bummer.

11-20-2017, 10:52 AM	#5
1434 Junior Member Join Date: Mar 2013 Location: Minneapolis, MN Photos: Albums Posts: 35	I can confirm the AF focus assist light failure on the 585EX as well. It was one of the main things I was excited about with this flash, and it absolutely refuses to function whatsoever. So far, the YN585EX is naturally a much better fit onto a Pentax body than the made for Canon YN560IVs I have. PTTL seems to work, just as long as you like your photos bright as hell. Not overblown mind you, but just bringing you right to the edge. Shame about the focus assist. I find that my K1 is slow to focus even in the best of conditions.

12-28-2018, 12:39 PM	#6
Mercifulfate Forum Member Join Date: Mar 2018 Posts: 92	Originally posted by 1434 I can confirm the AF focus assist light failure on the 585EX as well. It was one of the main things I was excited about with this flash, and it absolutely refuses to function whatsoever. So far, the YN585EX is naturally a much better fit onto a Pentax body than the made for Canon YN560IVs I have. PTTL seems to work, just as long as you like your photos bright as hell. Not overblown mind you, but just bringing you right to the edge. Shame about the focus assist. I find that my K1 is slow to focus even in the best of conditions. Came across this doing some reading. From what I understand the AF issue was fixed with the firmware update of the flash.

06-18-2019, 08:53 PM	#7
superdelsol New Member Join Date: Jan 2019 Location: Green Valley, Arizona, USA Posts: 11	I just bought a used YN585EX and the first thing I did was download and update the firmware to version 16-18. I can confirm that the YN585EX AF assist works with my K-r.