Canon Community Canon Community
 


Reply
Occasional Contributor
Posts: 7
Registered: ‎01-07-2020
Accepted Solution

16-35 f2.8 focus issue on video

I’m having focusing issues when using this lens on video with T6i body. Images are as sharp as can be expected out of this lens but video is just unusable. Camera is mounted on a tripod and I have tried about every focus setting I can think of. Vlog style video but moving or standing still everything is out of focus. I’m working inside a room and need the wide angle to capture as much as possible. I don’t think anything is wrong with the lens due to the fact it is sharp on photos and camera body is fine because other lenses are fine on video. Any ideas of where to start?
Honored Contributor
Posts: 5,164
Registered: ‎06-25-2014

Re: 16-35 f2.8 focus issue on video

[ Edited ]

What are the "other lenses" that are fine on video? With the possible exception of STM lenses, I didn't think that any lenses auto-focused in video on a T6i.

Bob
Philadelphia, Pennsylvania USA
Occasional Contributor
Posts: 7
Registered: ‎01-07-2020

Re: 16-35 f2.8 focus issue on video

24-105 f/4
24/70 f2.8
50mm f/1.2
Kit lens 18-55
70-300 f/4-5.6
All canon lenses and I don’t seem to have an issue with any but the 16-35. It has me puzzled for sure.
VIP
Posts: 8,870
Registered: ‎08-13-2015

Re: 16-35 f2.8 focus issue on video

There is something you are not telling us, so I will tell you, instead.  No, I do not think you are trying be deceptive. It is more like the camera does not behave you seem to assume it does.  Mainly, I do not think the T6i has a Movie Servo AF mode, which means it does not do "AI Servo" like subject tracking in Movie Mode.  KV, correct me if I am wrong.

 

Without knowing more about your shooting conditions, I cannot say why you get your worse results with super wide angle lens. 

----------------------------------------------------------------------------------------------------------------------------------------------------------

"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Esteemed Contributor
Posts: 3,612
Registered: ‎02-17-2016

Re: 16-35 f2.8 focus issue on video

Correct, one of the few improvements of the T6S over the T6i is video focusing. However, neither is as good as the T7i which has the phase detect on sensor.

 

In this case though, I think the OP wants to use Av mode and set a shutter of f/8 or f/16 for a wide DOF - which should be easy with a wide angle lens (though 16mm is not particularly wide on a crop sensor. That is why they made the EF-S 10-18). You will prbably need more light.

Occasional Contributor
Posts: 7
Registered: ‎01-07-2020

Re: 16-35 f2.8 focus issue on video

The 10-18 is cheap enough to give it a try as well. Thanks for all the fast input.
VIP
Posts: 8,870
Registered: ‎08-13-2015

Re: 16-35 f2.8 focus issue on video


@Project wrote:
The 10-18 is cheap enough to give it a try as well. Thanks for all the fast input.

The EF-S 10-22mm is a much better built lens.  It has both internal focusing and zooming, and an all metal body. 

 

With a camera body that cannot do subject tracking in movie modes, then it is perfect for doing the type of "head shot" videos that you see all over YouTube.  Always be aware of your available Depth of Field whenever you are shooting.  I see people shooting at f/16 when they could have had nearly the same results at f/5.6.

----------------------------------------------------------------------------------------------------------------------------------------------------------

"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
VIP
Posts: 11,902
Registered: ‎12-07-2012

Re: 16-35 f2.8 focus issue on video

"... I don’t seem to have an issue with any but the 16-35. It has me puzzled for sure."o 

 

Well for sure if you said almost any other Canon lens besides the ef 16-35mm f2.8L, I would be puzzled too.  I don't video so I am no help there. Perhaps little help elsewhere also but the one lens in my Canon inventory that I never use any more is the ef 16-35mm f2.8L It is a huge disappointment and surprise.

 

I like the suggestions from above that recommend the ef-s 10-18mm or ef-s 10-22mm not that I can claim either is a good lens, never having either, but they have to be better than the ef 16-35mm.

EOS 1DX and 1D Mk IV and several lenses!
Occasional Contributor
Posts: 7
Registered: ‎01-07-2020

Re: 16-35 f2.8 focus issue on video

I did a few tests today. If I sat still in front of the camera like I was doing an interview, the focus was just fine. I could pan side to side using a tripod and as long as I moved extremely slow, focus was fine. If there were anything moving very fast or pan at a moderate speed, everything was out of focus. I think the lens just can’t focus fast enough to keep up with the movement. I think I’ll get the EF-S 10-22mm and see if that’s better. Thanks everyone for all the input!!
VIP
Posts: 8,870
Registered: ‎08-13-2015

Re: 16-35 f2.8 focus issue on video


@Project wrote:
I did a few tests today. If I sat still in front of the camera like I was doing an interview, the focus was just fine. I could pan side to side using a tripod and as long as I moved extremely slow, focus was fine. If there were anything moving very fast or pan at a moderate speed, everything was out of focus. I think the lens just can’t focus fast enough to keep up with the movement. I think I’ll get the EF-S 10-22mm and see if that’s better. Thanks everyone for all the input!!

The lens can focus plenty fast enough.  It is your camera body that is NOT refocusing in movie mode.  If you believe that your other lenses are refocusing in movie mode, then I suggest that you retest them..The T6i is incapable of Movie Servo AF.

----------------------------------------------------------------------------------------------------------------------------------------------------------

"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
powered by Lithium

LIKE US on Facebook FOLLOW US on Twitter WATCH US on YouTube CONNECT WITH US on Linkedin WATCH US on Vimeo FOLLOW US on Instagram SHOP CANON at the Canon Online Store
© Canon U.S.A., Inc.   |    Terms of Use   |    Privacy Statement