Wednesday, August 8, 2012

Canon EF 17-40mm f/4L USM Lens review


                            CANON EF 17-40mm F4L 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 was knocked off a 2ft high coffee table lens was damaged.


Canon Lens 17-40mm EF f4L USM
Canon EF 17-40mm f/4L USM lens
 
Canon Lens 17-40mm EF f4L USM with broken off piece of the sleeve barrel assembly
Broken off piece of the sleeve barrel assembly
                                     
Canon Lens 17-40mm EF f4L USM
Temporary fix with super glue before new part arrived

                         
Canon Lens 17-40mm EF f4L USM
Two screw removed that hold the circuit board

                                       
Canon Lens 17-40mm EF f4L USM Circuit board removed
Canon 17-40mm: with Circuit board removed
                                                         
Canon Lens 17-40mm EF f4L USM
Hidden screws under rubber zoom ring


                                               
Canon Lens 17-40mm EF f4L USM Casing removed
Canon EF 17-40mm: 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.

Canon 17-40mm EF f4L USM Weight
Canon EF 17-40mm: Weight

                                         
 Canon EF 17-40mm f4 L USM Lens with an EW-83H Hood
Canon EF 17-40mm f4L USM Lens with an EW-83H Hood

                  

                               

Canon EF17-40mm F4L USM Instruction Manual

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


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