Lens noise when operating with IS?

[canon550d]

Does anyone experience some noise from the lens when half press the shutter for IS lens? It sounds like a humming radio channel but very soft.

 

[seezhijie]

That's the IS at work. No worries even Nikon and Sigma has it too

 

[canon550d]

Wend to CanonLink at Vivo to try their gears today.
Realised that IS + micromotor is really noisy. Haha.

 

[canon550d]

Sorry, I have another question. I have a EF-S55-250 IS.
When I turn AF on, IS off, the auto focusing is normal and smooth.
When I turn AF & IS on, sometimes the "image" jerks a little from the view finder, when I half press the shutter.
Is this because of the micromotor working in the lens?

I actually went to CanonLink at Vivo to try out the DSLR there, no such "jerking" is felt when using the 60D, 7D of 5D.
But when I use the 600D & 550D (I think the lens was 18-135 or 15-85), the "jerking' is felt.

 

[tecnica]

Slight jerking is OK, it means the IS is at work.

 

[canon550d]

But no such jerking is felt if the lens has USM.

 

[tecnica]

Iirc, the jerking was very slight, perhaps close to none, on my 18-135.

On my 17-55, and 70-200L, I dun recall experiencing any jerking at all.

 

[canon550d]

Advisable to send to CSC to check since still under warranty?

 

[SkyStrike]

Sorry, I have another question. I have a EF-S55-250 IS.
When I turn AF on, IS off, the auto focusing is normal and smooth.
When I turn AF & IS on, sometimes the "image" jerks a little from the view finder, when I half press the shutter.
Is this because of the micromotor working in the lens?

I actually went to CanonLink at Vivo to try out the DSLR there, no such "jerking" is felt when using the 60D, 7D of 5D.
But when I use the 600D & 550D (I think the lens was 18-135 or 15-85), the "jerking' is felt.

The "jerking" on the 55-250 is normal. And as mentioned by other CSers, it's the IS at work. You just need to reframe abit after the jerking.

 

[canon550d]

Thanks for the advice.
This is first time using Canon lens with IS.
Hope to save money to buy better lens in future. But at the moment, the 55-250 still sufficient for me, image is sharp.