Telescopic lens question:Dpqservice manual download site
1 barrel distortion caused by external forces, or into the sand caused by stretching too much resistance.Dpqservice 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.Dpqservice manual download site
3 Focus component is not working properly, causing repeated telescopic tube, can not boot and error.Dpqservice 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.Dpqservice manual download site
Behind the three issues and in many cases related to poor contact lens cable.Dpqservice manual download site

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