- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
I Have a problem qith the Tamron 28-75Aspherical Lens XR Di for Canon mount. Just make a strange sound like to power on the iris motor when you insert the lens to the camera body. I just disarmed totally it, but the problmes seems to be with the electronics parts.
If you are interested I will sell the lens to you or you can sell your broken lens to me. For contact please write to partgio @ hotmail . com or to partgio @ yahoo. com or partgio @ gmail.com
A stuck shutter is another common failure mode for digital cameras. The symptoms of a stuck or "sticky" shutter are very similar to CCD image sensor failure. The camera may take black pictures (for shutter stuck closed), or the pictures may be very bright and overexposed, especially when taken outdoors (for shutter stuck open).
To confirm a stuck shutter, put the camera in any mode other than "Auto", and turn the flash OFF (you don't want to blind yourself for the next step). Next look down the lens and take a picture. You should see a tiny flicker in the center of the lens as the shutter opens and closes. If no movement is seen, then you likely have a stuck shutter. If so, please see this link for further info and a simple fix that may help.
Before opeing the lens. You cannot check the iris without setting the lens on the body. Engage the lens on to a body and check the iris opening by releasing the camera at "B" speed. While holding the shutter release, move the f/stop ring if the iris work. If not, you cost of repair by technician would run anywher from $35 to $60 so go ahead and be brave. open 4 screws from the back and start digging in. Good Luck. For further repair assitance, go to www.camerarepairjapan.com James.
a penlight shined into zoomed back lens - shows
if iris is open ( ccd looks like a small xmas
tree scene , deep in center ) : if iris is
stuck closed , a thorough lens cleaning should
restore camera video - if iris is open , the
ccd may be or already has failed ;
Try this test. While turning camera off apply light pressure to the lens tube to see if there is a point where the gear engages to close the lens fully. This fault indicates broken gear teeth on the outside of the largest diameter barrel. Scrap the lens or use it for parts. A broken gear in the motor gear box will not respond to this test whatsoever. A lens that doesn't fully close, sticks up about a quarter inch and freezes on the Canon logo on power up inidicates the focus mechanism has not fully closed--perhaps a software glitch. The repair involves desoldering plastic ribbon connections and removal of the back panel to gain access to the focusing screw type motor armature to reset the small internal lens so it is flush with the back cover. This lens prevents the lens from completely closing. Reassemble and start taking pictures again.