One of my lenses appears decentred, with front focusing on one side and back focusing on the other. Does a Canon repair centre fix this type of problem? If so, would it best be done as part of a general service?
D. said:I have sent two lenses in that were decentered for Canon to repair. They did improve both lenses, but neither lens was completely fixed. After those experiences, I carefully check each lens when I buy them so I can return if necessary. Others may have different experiences.
bholliman said:Canon did a good job repairing a decentered 100L Macro lens for me 3 years ago. It was soft on the right side and came back perfect. I sent a.detailed explanation of the problem and prints, I think this helped.
privatebydesign said:It doesn’t. It goes on a bench lens test rig, if it meets specs it’s left alone if it doesn’t it is worked on.
privatebydesign said:bholliman said:Canon did a good job repairing a decentered 100L Macro lens for me 3 years ago. It was soft on the right side and came back perfect. I sent a.detailed explanation of the problem and prints, I think this helped.
It doesn’t. It goes on a bench lens test rig, if it meets specs it’s left alone if it doesn’t it is worked on.
I have sent very detailed explainations and test images that have been returned un-looked at, if the lens passes the bench test specs it gets returned. I had a long running issue with a 16-35 f2.8 that took several trips to get sorted out satisfactorily.
privatebydesign said:bholliman said:Canon did a good job repairing a decentered 100L Macro lens for me 3 years ago. It was soft on the right side and came back perfect. I sent a.detailed explanation of the problem and prints, I think this helped.
It doesn’t. It goes on a bench lens test rig, if it meets specs it’s left alone if it doesn’t it is worked on.
I have sent very detailed explainations and test images that have been returned un-looked at, if the lens passes the bench test specs it gets returned. I had a long running issue with a 16-35 f2.8 that took several trips to get sorted out satisfactorily.
AlanF said:privatebydesign said:bholliman said:Canon did a good job repairing a decentered 100L Macro lens for me 3 years ago. It was soft on the right side and came back perfect. I sent a.detailed explanation of the problem and prints, I think this helped.
It doesn’t. It goes on a bench lens test rig, if it meets specs it’s left alone if it doesn’t it is worked on.
I have sent very detailed explainations and test images that have been returned un-looked at, if the lens passes the bench test specs it gets returned. I had a long running issue with a 16-35 f2.8 that took several trips to get sorted out satisfactorily.
The tech was probably a CR member and recognised you.
That's much like what a friend does with his cameras. He buys the consumer level models and a multi-year protection plan, then uses them for his professional work. When they start to fail, usually just after the next model comes out, he sees that they need to be replaced. Unlike me, who tends to use the last generation pro-grade cameras, he always seems to have the latest stuff.neuroanatomist said:So, if you have a subtle problem the best path forward is to make it worse before you send it in.