Tamron sp 17mm 3.5 has unscrewed

Set up focus point using autofocus, then set camera to manual focus before attaching filter, and be careful not to move focusing ring.

Hi Lyndsay. If the lens barrel is twisting, and the optics are not bringing the the object in the viewfinder in and out of focus, there is a problem with the lens. The motor is operating but there is a disconnect with the optics. This lens should be returned to Tamron for repair.

The twisting of the barrel is the lens "hunting" for correct focus. Now, this is not to say there is a problem if the barrel is twisting but the image is getting sharper and then blurry again. When this is happening, the lens is hunting for focus, but there isn't sufficient light for the camera to sense when the subject is in focus. The camera is commanding the lens to find focus by running the lens to minimum distance and out to maximum distance to find it. If this is the case, bring the camera to a well lit space and see if it can successfully find focus. If it does - the problem is the lack of light.

I hope this helps and good luck!

Try cleaning the lens and camera contacts gently with a lint-free cloth

Hi,

This error indicate that focusing ring got stuck or jammed due sand, dust or may be due to external shock caused by dropping the device.

• Try compressed air. With a fine tip blow off gun around lens barrel. It should remove all dust and sand. Turn the camera on this will solve the problem.
• You can gently bump the camera to try to free the focusing ring.
• You can try to turn camera ON at the table (facing it to the ceiling), don't put camera down face to the floor when opening.
  

If motor is running but lens won't retract sometimes lens would slip off with the gear or break off a tooth in the gear when it gets dropped. Try to gently move the lens barrel around with the finger and see if it is moving, but if tooth or gear is broken lens will move once or twice then it will stuck again.

Else your camera need to be disassembled to get at the focusing ring at Service Center.

Thanks and have a nice day

Hi,

Canon E18 error shows when the lens gets stuck while trying to extend.

• This error indicate that focusing ring got stuck or jammed due sand, dust, may be due to external shock caused by dropping the device. try compressed air. With a fine tip blow off gun around lens barrel. It should remove all dust and sand. Turn the camera on this will solve the problem.
• You can gently bump the camera to try to free the focusing ring.
• You can try to turn camera ON at the table (facing it to the ceiling), don't put camera down face to the floor when opening.
  

If motor is running but lens won't retract sometimes lens would slip off with the gear or break off a tooth in the gear when it gets dropped. Try to gently move the lens barrel around with the finger and see if it is moving, but if tooth or gear is broken lens will move once or twice then it will stuck again.

Else your camera need to be disassembled to get at the focusing ring at Service Center.

Thanks and have a nice day

Hi,

Its seems lens got stuck in the barrel due to external shock caused, Try out following steps-

• If motor is running but lens won't retract sometimes lens would slip off with the gear or break off a tooth in the gear when it gets dropped. Try to gently move the lens barrel around with the finger and see if it is moving, but if tooth or gear is broken lens will move once's or twice then it will stuck again.
• You can gently bump the camera to try to free the focusing ring.
• You can try to turn camera ON at the table (facing it to the ceiling), don't put camera down face to the floor when opening.
  

Else contact Olympus, your camera need to be disassembled to get at the focusing ring at Service Center .

I hope this will solve your problem

Thanks..!!

Hi,

You should turn the aperture ring on the lens toits smallest setting (largest f/number). If the ring has a lock, lock it inplace. You control the aperture from the camera body, just as you would on alens with no aperture ring.

Let me know if you need more information


Thanks

Haha!!
Maybe its something you're not doing, LOL.
Look on the side of the lens. Most of the 70-300 macros have a slide switch. My Tamron, for instance, needs to be zoomed out to 300, then slide the switch to Macro and its ok. Look for the slide switch. You might also notice lines of a different color to denote Macro.
Some days it too tough to be smarter than the lens,
LOL.

Make sure the lens is set for the largest f number on the aperture ring. there may be a lock to prevent the ring from turning in the future. Locking the lens of the largest f number allow the camera to set the lens through the camera. This is normal on most of the newer cameras.

If the lens does not have a move-able aperture ring, then dismount and remount the lens, making sure the lens is completely mounted and locks into place, completely lining up the contacts inside. If this does not work The camera or lens may need servicing.

the same thing just happened to me like 3 days ago. The zoom ring was kinda sticky and then all of a sudden it just spins around and doesnt extend the barrel at all.