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New Contributor
Posts: 4
Registered: ‎06-12-2018

Re: Upgrade Help

Thank you

 

I did recall reading about a difference for video and couldn't find a clear solution when i went back to look.

 

But after seeing the next response this would then mean a lens of "lesser quality" is used to get the best features for video? 

 

 

Esteemed Contributor
Posts: 4,981
Registered: ‎06-25-2014

Re: Upgrade Help


@MikeBlueMedia wrote:

Thank you

 

I did recall reading about a difference for video and couldn't find a clear solution when i went back to look.

 

But after seeing the next response this would then mean a lens of "lesser quality" is used to get the best features for video? 


Video is not as dependent on outright image quality as still photography is. A lens of less than ideal image quality may have other features that are more important in a given situation. STM lenses, for example, are usually quieter than USM lenses, and therefore less likely to interfere with audio recording.

Bob
Philadelphia, Pennsylvania USA
VIP
Posts: 11,199
Registered: ‎12-07-2012

Re: Upgrade Help

I am not a video guy but I know several guys that shoot vid a lot.  My take is STM is for amateurs. STM lenses sacrifice speed in order to be quieter and smoother. 

 

Lenses with USM focus designs are built for speed. Quiet operation is second. They are optimized for still images.  Jerky starts and stops that get them in focus faster are meaningless.

 

The more advanced videographers tend to use manual focus lenses. They have external focusing rigs that attach to the lens and allow fast and finer focusing control. 

EOS 1DX and 1D Mk IV, even less and less other stuff.
VIP
Posts: 8,159
Registered: ‎08-13-2015

Re: Upgrade Help


@MikeBlueMedia wrote:

Thank you

 

I did recall reading about a difference for video and couldn't find a clear solution when i went back to look.

 

But after seeing the next response this would then mean a lens of "lesser quality" is used to get the best features for video? 

 

 


The STM focusing system is much smoother than the USM system.  While a USM lens will “snap” into immediate focus on a subject, which is ideal behavior for shooting stills, an STM lens can make a smoother focus transition between a near and far subject when the camera is in Movie Mode.  When the camera is in Photo Mode, STM lenses seem to be on equal footing with the speed of a USM lens..

 

All of my Canon L glass are USM lenses, and they are all pretty quiet when it comes to focusing.  But, shooting video with a DSLR is where USM lenses can become noisy, probably because their apertures are designed for discrete 1/3 stop steps, not continuous adjustment

 

Aperture adjustment.  The STM lenses really excel is shooting video and making aperture adjustments.  Just as with the focusing, STM lenses are able to make smoother aperture transitions in video mode, almost as good as a manual cinema lens with a declicked aperture ring.

 

Once you get into the world of cinema cameras, there is a whole new set of focusing aids to use.  Using high quality L glass is what you want to use with cinema cameras.

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Esteemed Contributor
Posts: 3,340
Registered: ‎02-17-2016

Re: Upgrade Help

Just to add to the confusion, the new "nano" USM lenses are supposed to be the best of both worlds.

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