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Occasional Contributor
Posts: 6
Registered: ‎06-30-2015

5D mkiii video focus issues

Hi everyone, 

 

My first post and i'm hoping to find some help.

 

Recently i've been seeing issues with focus on my 5dmkiii. The image looks sharp on the LCD (at maximum zoom) but soft when i check the file on the desktop. It's across all lenses and all picture modes.

 

I've been using 5D's for a few years now but this has me stumped. Any help would be much appreciated.

 

thanks

Jamie

Reputable Contributor
Posts: 754
Registered: ‎11-14-2012

Re: 5D mkiii video focus issues

[ Edited ]

Video? You can´t zoom the video in your camera I suppose.

Occasional Contributor
Posts: 6
Registered: ‎06-30-2015

Re: 5D mkiii video focus issues

 

Everything looks sharp on the LCD when magnified but the output file is still soft.

Respected Contributor
Posts: 1,967
Registered: ‎02-26-2015

Re: 5D mkiii video focus issues

[ Edited ]

@conran wrote:

 

Everything looks sharp on the LCD when magnified but the output file is still soft.


Are you judging the sharpness on your computer monitor with the full image displayed, or are you zooming in on a portion of the frame?

 

Also what 'pcture style' are you using when shooting your video?

Reputable Contributor
Posts: 754
Registered: ‎11-14-2012

Re: 5D mkiii video focus issues

Any example?

Occasional Contributor
Posts: 6
Registered: ‎06-30-2015

Re: 5D mkiii video focus issues

Looking at the file on desktop, the image is sharp on the camera.

 

Tried multiple picture styles/apertures/lenses etc and still the same result. Also had the same results in a studio set up with lots of lighting.

 

Here's a sample video vs low res jpg still.

 

mkiii_test.jpg

Highlighted
Respected Contributor
Posts: 1,967
Registered: ‎02-26-2015

Re: 5D mkiii video focus issues


@conran wrote:

Looking at the file on desktop, the image is sharp on the camera.

 

Tried multiple picture styles/apertures/lenses etc and still the same result. Also had the same results in a studio set up with lots of lighting.

 

Here's a sample video vs low res jpg still.

 

mkiii_test.jpg


There is a difference between focus and resolution. The 5D Mk III uses pixel binning to reduce the sensor resolution down to video resolution. Video simply has less resolution. The thing to keep in mind, is that if nothing is sharp then it is not a focus issue. 

Occasional Contributor
Posts: 6
Registered: ‎06-30-2015

Re: 5D mkiii video focus issues

Thanks Martin, understand there's a difference betwen resolution and focus. I know the mkii requires sharpening in post, more so than the mkii etc but the quality of video has reduced considerably.

 

as i said, focus on the LCD is pin sharp (as sharp as it gets with a mkiii) but the output is unnaceptable even for a dslr video.

 

Tried it on my mkii as well and same issue. firmware is up to date etc, (this was happening before the update).

 

Only thing i can think of is somehow a card has corrupted both cameras but i'm just guessing really.

 

Too the cameras to a Canon specialist and they couldn't understand it either.

Esteemed Contributor
Posts: 3,815
Registered: ‎06-11-2013

Re: 5D mkiii video focus issues

Or stated differently... in "still" mode it's a 22MP image.  In "video" mode it's a 2MP image.  

 

A 2MP image isn't going to have the detail-resolving capability to compete with a 22MP image.  

 

 

Tim Campbell
5D III, 5D IV, 60Da
Occasional Contributor
Posts: 6
Registered: ‎06-30-2015

Re: 5D mkiii video focus issues

Thanks Tim, understand the difference in quality.

 

This isn't a comparison between still and video though. The video is out of focus, difference between 'in focus' on the LCD and what comes out of the camera is just night and day so to speak.

 

I've shot with both mkii and mkiii and had much sharper files in the past Tried clearing all camera settings etc and starting again but still the same issue.

 

Has me stumped. 

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