Telescopic lens question:CtDservice manual download site
1 barrel distortion caused by external forces, or into the sand caused by stretching too much resistance.CtDservice manual download site
2 Hall detection of problems, resulting in smooth telescopic lens though, but you can not stop the machine when the switch is in the correct position, the lens described earlier post mentioned the W side.CtDservice manual download site
3 Focus component is not working properly, causing repeated telescopic tube, can not boot and error.CtDservice manual download site
4 anti-shake component problems may also cause the lens barrel extends to a position behind the action would not, including the LCD can not be displayed properly.CtDservice manual download site
Behind the three issues and in many cases related to poor contact lens cable.CtDservice manual download site

Lens imaging problems:CtDservice manual download site
A viewfinder blur: Lens damp fog caused by the lens surface.CtDservice manual download site
2 viewfinder normal photo shoot with stripes, aperture, shutter assembly problems caused by over-exposure caused.CtDservice manual download site
3 viewfinder black: shutter assembly is not open, not the viewfinder.CtDservice manual download site
The latter two issues, and in many cases related to poor contact lens cable.CtDservice manual download site