Canon sd300 lens noise

Sounds like you have faulty CV joints. Take it to a mechanic who can check it out for you.

Sounds like while you were fixing it, you crossed a thread somewhere. For the focus to be out on both manual and auto is a give in. All it takes is the finest spec of sand or... bogey to get wrapped up in the threads...and it's night nurse. You can try putting it in Manual Focus Mode, rotating the lens slowly till you hear or feel resistence...then you'll get a better idea of where you're at. If there's resistance, it's crossed - if there's a gritty sound, a piece of sand or snot is throwing out the barrels.

If by "gritty" you mean full of digital noise, a common cause for this is an ISO set too high.

It sounds like your lens is out of alignment and dragging. Check to see if there is any debris caught around the edge of the lens. Other than that, a repair or replacement may be necessary.

You have most likely dropped the camera or banged it against something while the lens was out. This situation causes the brass pinion gear to shear teeth off the plastic ring gear on the Inner Lens Housing. It may also cause the guide pins to jump their track. If this is the case the repair bill usually exceeds the value of the camera and you are probably better off selling it for parts on eBay and getting a new higher resolution camera.

this is start up,this is not a problem just noticeable.

sounds drastic but turn on cam and grab hold of lens to try to fully extend it manually. if you hear a crunching noise that means the gears are stripped. not worth repairing

**** it

This can be caused by several different situations. Most commonly the camera has experienced some kind of impact which knocks an element out of alignment, preventing the lens from rotating normally. Symptoms of this include: *you may hear no mechanical sound at all when the camera is turned on *you may see visibly mis-aligned components of the lens *you may hear a loud "snap snap" sound as the camera tries to move the lens when the camera is powered on The second most common cause is a particle of sand getting stuck in the focus motor drive gears. This prevents the focus element from moving normally and causes the camera to shut off to prevent damage to the lens assembly. Symptoms of this include: *A loud "buzzing" sound when the camera is turned on, followed by the beeping and shutdown. Finally the third most common cause of this problem is a broken tooth on the zoom motor drive gears. Symptoms of this include: *the sound of the running motor with a regular "click click click" sound for several seconds. This will not be a "snap snap" sound, that is a different problem. *the lens will move in and out easily by hand as if free from any resistance. All of these problems require disassembly to repair. The charge is around $125 labor at my shop.

The lenses on this model is impossible to dismantle and repair. It is best to take into a Canon repair shop.