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Weird Shake with Canon Lens?

SeanBrown

SeanBrown

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I am shooting with my 70-200 2.8 IS L on the scarlet. The IS is turned OFF! When zoomed in at 200 or any focal lenght there is a small shake in the image. I am not touching the camera. The tripod is very rock stable. Not sure what it is. I turned off AF on the camera to see it is was still accessing it to try to move the focus or something. Anyone else have this happen?
Could be that I am crazy. Going to put up a video once RCX is done with it
 
I am not that good. It was the IS.. Thanks Joseph. I switched the wrong switch when turning it off the 1st time.. That little jitter is no fun!
 
SeanBrown said:
I am not that good. It was the IS.. Thanks Joseph. I switched the wrong switch when turning it off the 1st time.. That little jitter is no fun!
Click to expand...
Yeah, if you accidentally switch the IS mode instead of turning it off it's especially bad, since the other mode is meant to compensate for a lot of movement, so when it's locked down it'll respond with erratic compensation for phantom movement, which looks really scary
 
Yeah man I was gonna say, I had this happen but when I turned off the IS it immediately went away. Glad you got it figured it out :)
 
Seems to me that both settings make it shake, just one worse than the other. Does that mean we should not use IS on our Reds?
 
Ben A. said:
Seems to me that both settings make it shake, just one worse than the other. Does that mean we should not use IS on our Reds?
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I too would be glad to hear others thoughts on this as the non IS 70-200 2.8 is half the price...
 
No I love the IS for my 5d Mark ii so good. The lens is great. But for video with the red it does not seem to make things go well. But I have not tested it for things with alot of motion that we want to be stable,might help.. Any one test this?
 
My guess... The fan spinning in the body is inducing it. Will need to set the fan to off to test, but it cant be anything else.. unless these lens are possessed ;)
 
It was the IS just being funny. Could be the fan telling them that the camera is shaking.. Best to not use it for long focal lengths
 
SeanBrown said:
No I love the IS for my 5d Mark ii so good. The lens is great. But for video with the red it does not seem to make things go well. But I have not tested it for things with alot of motion that we want to be stable,might help.. Any one test this?
Click to expand...

SeanBrown said:
It was the IS just being funny. Could be the fan telling them that the camera is shaking.. Best to not use it for long focal lengths
Click to expand...

I don't want this to become another myth like "RED Ones always overheat", and I know you aren't intending to do so.

From my many experienced, Image Stabilization is one of the things which makes Canon glass shine on the EPIC...

https://vimeo.com/29593505


IS isn't to be used in all applications. But when the time is right, it is quite powerful...even at 300mm, 600mm and 800mm.
 
Ben A. said:
Seems to me that both settings make it shake, just one worse than the other. Does that mean we should not use IS on our Reds?
Click to expand...

No - just read the lens manual about when to use it and when not to. Although intended for stills shooting, it works in some video situations too. Static on a tripod is one situation not to use it!
 
mode 1 is both directions simultaneously. mode 2 is only one direction at a time (better for pans sometimes) Lock down shots or ones with only slight movement may be hampered by IS but use it on a slider at 200mm all the time to smooth out the movements and micro shakes.
 
Yes, remember we're talking about still lenses here, first of all. Like Justin said, mode 1 stabilizes in both up/down and left/right axes, and mode 2 stabilizes on the up/down axes only, from my understanding. This is used a lot by sports photographers when panning on a monopod for instance.

Hand-held shots should be just fine with IS on in most cases, as the movement is on both axes. Joseph, your demonstration is an excellent one. Thanks for posting!
 
Close, but Mode 2, according to the manual can be used on a pan or tilt but will only stabilize in one of the directions. Basically it turns off one axis but can do either.
 
I've used at least one canon lens in the past in which the IS mostly worked properly but periodically it would go crazy and vibrate the image like the IS was trying to compensate for vibration that did not exist. It mostly happened when while the camera was moving, and I could hear the IS motor going crazy. It was probably a bad motor or system, but in generally I would be careful with still lens IS since it can do funky things in my experience and even when it is working properly I often find it can be a bit too aggressive for motion.
 
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