Wednesday, August 8, 2012

Canon EF 17-40mm f/4L USM lens


                            CANON EF 17-40mm F4 L USM LENS
The Canon EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image  quality and a constant maximum f4 aperture. Its compact, lightweight body makes it an
 ideal traveling companion

             This Lens was mounted on a Canon 7D that dropped off a 2ft table lens was damaged 


Canon EF 17-40mm f/4L USM lens
 
Broken off piece of the sleeve barrel assembly
                                        
Temporary fix with super glue before new part arrived

                               
Two screw removed that hold the circuit board

                                           
Circuit board removed
 
                                                             
Hidden screws under rubber zoom ring


                                                  
casing removed

                                                     
Zoom ring needs to be removed from old casing by taping out the two plastic white tabs,And fitted to
the new casing on the right.

Weight of the Canon EF 17-40mm f4 L with filter

                                         
Canon EF 17-40mm f4 L USM Lens with a EW-83H Hood

                  

                               

Canon EF17-40mm F4L USM Instruction Manual

 
 Canon EOS-1D Mark IV
                                                   Google +
Photos By John Torcasio


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