Can't AF with 75-300 IS

[robert_clark6]

<p>I have a 75-300 IS that won't AF. I've tried it on a couple of cameras and it doesn't seem to work. Cleaned the contacts, checked the A-MF switch, but still no go. Any idea what could be wrong? How much would Canon whack me to fix it?</p>

<p>Thanks,<br>

Bob</p>

[dcstep]

<p>If it's not under warranty, then it'll be around $100, assuming nothing catostrophic.</p>

<p>Have you owned it for a while and it used to work or did you just buy it. If you just bought it, then send it back for a refund.</p>

[manuj_makhija]

<p>r you using a polariser?</p>

[chrisnielsen]

<p>I'd consider that a blessing in disguise if I still owned one of those lenses - the one I had wasn't even fit for use as a boat anchor. Do yourself a favour and get something better!</p>

[mike_oflaherty]

<p>I just had my 28/135 repaired, tried the same as you cleaning etc in the end the IS was gone. They replaced the motor and it's back up to snuff. Now it it all depends what you consider a whack. My repair was $164 and about 3 weeks in the shop. Some may say dump it, up grade but if it does the job keep it, get it repaired and enjoy it.</p>