Focus test - Canon EF 35, 50, & 24-70mm

[david_winters]

Shot some breathing tests yesterday. Focus pulls from infinity to approx 3' and from approx 3' to 8'

Canon EF 35mm 1.4 L @ f2
Canon EF 50mm 1.4 @ f2
Canon EF 24-70mm 2.8 @ 2.8

Shot all clips on the Canon 5D II with ND.9 filter to maintain desired stop. I assumed the primes would breath the least but the zoom actually performed much better.

http://www.youtube.com/user/davidwinters

 

[Matt Uhry]

Shot some breathing tests yesterday. Focus pulls from infinity to approx 3' and from approx 3' to 8'

Canon EF 35mm 1.4 L @ f2
Canon EF 50mm 1.4 @ f2
Canon EF 24-70mm 2.8 @ 2.8

Shot all clips on the Canon 5D II with ND.9 filter to maintain desired stop. I assumed the primes would breath the least but the zoom actually performed much better.

http://www.youtube.com/user/davidwinters

Thanks for posting, It looks like there is quite a bit of image shift in the 50mm prime - does it look that way on the orig. footy ?

Matt Uhry
www.mattuhry.com

 

[david_winters]

Hi Matt,

The 50mm tested is the USM f1.4 (not "L") version.

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=152&modelid=7307

The 50mm did have the most image shift. However, the image did not jump when changing focus direction, which I've read is an issue in servo mode.

My 35mm L has slightly less image shift, but is still significant. I'm very happy with the performance of the 24-70L.