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Canon 70-300mm USM IS 4-5.6 lens making constant "alarm" sound and image thru the viewfinder shakes

Tamarascamera
Apprentice

When I turn camera on,  the lens makes a sound like a low-pitched alarm and it never goes off until I turn power on.  Also, when I look through the viewfinder, the whole image is shaking in tune with the alarm.  You can feel the camera shake with each beep of the alarm.  I say "alarm" because not sure off a better way to descrdibe it. It's not high pitched, but something is obviously malfunctioning.  It sounds as though something is stuck in the motor?  Obviously it won't take a good pic because it won't focus either.

7 REPLIES 7

rs-eos
Authority

To help figure out what is at fault, first turn off the stabilizer (IS) and also switch the lens to manual focus (MF).  Does the sound still happen?

 

If no sound, first switch the lens into auto focus (AF).  If still no sound, switch back to manual, then turn the stabilizer on.  With the stabilizer on set the mode switch to 1 and then 2.

--
Ricky

EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L, 600EX-RT (x6), ST-E3-RT
EOS C70, RF 24-70 f/2.8L IS, EF-EOS R 0.71x

ebiggs1
Legend

Those are exact trouble shooting step to follow for sure. But the bottom line is something is very wrong.  And, it is not a good candidate for repair so make sure you get a good estimate before you do that. Working used lenses are in the $200 range so that is the limit for a repair.

EB
EOS 1DX and 1D Mk IV and several lenses!

Tamarascamera
Apprentice
So I did try turning off the image stabilization and turning it to manual and it still made the sound and also still made the sound when I put it back on AF. No matter what I did it still makes this noise. Bummed.

Tamarascamera
Apprentice
Thank you for the advice - I really appreciate it.

Wandalynn
Enthusiast
Just out of curiosity, how long have you owned this lens and what camera are you using it on?

Tamarascamera
Apprentice
Well I have used it originally on a Canon Rebel T6, then a Canon 5D Mark II and then a few months ago got a Canon 5D Mark III. I have owned the lens about three years. It has been used a lot on sports photography, so thousands and thousands of pictures.

Thanks. I was curious because I just ordered a "gently used" one to use on my 90D. A friend had ordered (a used) one and when I tried hers, I liked it because it was so compact and lightweight so will make a great walkaround lens for butterflies, etc. I got a good deal on mine and am looking forward to receiving it. Good luck with yours!

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