Question about Canon EF 70-200mm f/2.8L IS USM Autofocus Lens

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Canon 70-200mm f/2.8 IS lens not focusing

I have had this lens for about 1 1/2 yrs. I did buy it used. I shoot basketball and basesball games with it. No problems at all, until now. At basketball games about 1/4 of my pics are out of focus - either completely blurry or slightly blurry. The lens just doesn't seem to be focusing in all the time. I am not donig anything different at all and have checked all the settings numerous times. I shoot pics at all basketball games, so I've taken a lot of shots to compare. Any suggestions as to what it could be?

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Re: Canon 70-200mm f/2.8 IS lens not focusing

I have had to replace the focusing servo motor is these before. The problem of seeking without locking in may mean the same for your lens. Do check for a dirty filter on the front and look to see if the rear optic is dirty or cloudy first. I'm assuming other lenses work fine on your camera.

Posted on Jan 05, 2008

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I am having a problem with my new Pentax DA 50-135mm 2.8 lens not focusing

Hi Ally,

It sounds like you may have commanded the camera to use one of the other 10 focus points in the viewfinder. There are 11, total with one in the very center, and the rest around it. It looks like this:


Page 130 of the manual begins a discussion of Auto Focus. Page 133 details how to change the focus point. If you like to center the subject in your veiw finder & pictures, you should select the center focus point if it is set to one of the others. You may still have dark or soft pictures if the shutter needs to stay open too long. You can reduce the exposure time by bumping up the ISO to a value of 400 or 800 or more - as limited by you liking. The higher your ISO goes, the less time required - but the more grainy the image is.

Good luck!

Jan 28, 2012 | Pentax SMCP-DA 50-135mm f/2.8 Lens for

1 Answer

I have been given a vivitar 70-210 series 1 lens 1:3.5 with a Canon AE1 would the lens work with a DSLR Nikon D3100 - would I need to buy an adaptor ?

No, and no.

The lens will not work on a Nikon camera.

Nikon cameras are deeper than Canon cameras. Even if a Canon lens fit onto a Nikon body, it would not focus at infinity. In order to enable a Canon lens to focus at infinity on a Nikon body, a lens adapter would have to have a negative thickness.

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1 Answer

Hello, We have a Canon EOS Rebel xti & the Canon EFS 18-55mm that originally came with the camera. We have been using the camera with no problem for about 2 yrs when one day the Auto focus stopped...

I've seen that before and in my experience it's usually due to the autofocus motor going. Your best bet would be to contact the Canon Imaging in your country and see what they suggest you do.

May 05, 2011 | Canon EF-S 18-55mm f/3.5-5.6 USN Lens

1 Answer

How do I adjust my Canon EF 100-400mm infinity setting on the lent. 300 to 400mm is out of focus.

I don't know your photography background and skill, so these tips may seem overly basic.

Have you tested this on a tripod? Not using a tripod can add a lot of blur, even while using the IS.
I would also try the lens at f/8 and see if you have the same focus issues. If not, it may just be related to shooting the lens wide open, where it's not the sharpest.
I hope this helps. It's just a few things to try.
Send a comment if you'd like some other possibilities.
Happy shooting with a great lens!

Mar 06, 2011 | Canon EF 100-400mm f/4.5-5.6 IS USM Lens

1 Answer


It's probable that although it's designated Macro, the lens actually only gets in fairly close. I recommend you buy a closeup filter which is a simple lens you screw on the front of your lens. You can different strengths for getting in closer. Otherwise treat yourself to a set of extension tubes which do the same thing but more effectively.
I hope that helps

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1 Answer

Autofocus on my Canon 28-135mm f/3.5-5.6 EF IS fails

Hello. First, check the contacts on the lens mount--you're looking for bent pins, oxidized(odd-colored) metal, damaged contact points, etc. The camera must communicate reliably with the internal circuitry of the lens unit. If there is any dirt, moisture, intermittent contact going on, the sensitive focusing electronics will be effectively blinded. If all is fine with the contacts, then the problem lies with the circuits in the lens that provide critical focusing data to the camera. Movement of certain parts causes electrical changes to occur at a calibrated rate--if the camera loses connection, it can't tell if the lens is actually adjusting. You'll have to send the lens in for repair-- This address should get you started.--Hope I helped!---Rick

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1 Answer

Would a canon 100mm f2.8 be a lense to use to shot a basketball game sitting under the goal?

Well it could be used but you may find the auto focus to be too slow and the aperture of f2.8 a bit dark for indoor sports. That lens is best used in the role it was intended — macro photography. Take a look at the 85mm f1.8 USM or the 100 f2 USM. They are reasonably priced and offer greater AF speed and low light ability.

Hope this helps

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18 Answers

Auto Focus not working for Canon EFS 18-55mm lens

Pulling gently on the focus ring worked for us. Exactly what the Dr. ordered. Slight pop, maybe 1/16" movement, and the lens is working again!

Jun 29, 2008 | Canon EF-S 18-55mm f/3.5-5.6 USN Lens

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Trouble focusing with sigma 70-300 DL macro super lens

It will not focus on anything closer than 5 feet.

(From Sigma lens literature)
Capable of macro photography, this lens has a 1:2 maximum close-up magnification at the 300 mm focal length. It's the ideal high performance lens for portraits, sports photography, nature photography, and other types of photography that frequently use the telephoto range. It also has a switch for changeover to macro photography at focal lengths between 200mm and 300mm with a maximum close-up magnification from 1:2.9 to 1:2. The minimum focusing distance is 1.5m / 59 in. at all zoom settings.

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1 Answer

Lens auto focus sometimes does not work.

First make sure contacts on lens are clean ( see enclosed pic #2 ) . If this does not solve the problem the ultrasonic motor may be faulty pic #1.( sometimes switching on but sometimes not , will have to be replaced , unless there is a bad connection between the motor and lens pc board )
#1880e583.jpg #2 d5f637d.jpg

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