I attached my new-to-me (bought used a few months ago) Canon 1.4x TC mk1 to my 70-200 f4L and 1D, and it seems to be front focusing. Without the TC, all pictures are sharp where I expect them to be sharp. With the TC, the further away the object, the further the focus plane seems.
For example, on the car mirror and lamp post, they are reasonably sharp (although note on the car mirror the focus plane is slightly in front of the mirror), but then on the picture with the house the focus is on the fences and the house is OOF (I was definitely aiming and watching the AF points illuminate on the house). The license plate shot shows that it OOF completely.
Wide open (ie, f5.6), high shutter speeds (about 1/400-1/500), ISO200.
Am I doing anything wrong? Would the contacts need to be cleaned or something? Thanks
Since my lens performs perfectly and both my DSLR bodies perform perfectly with all other lenses attached, my thought is that it must be the TC, not the rest of the lot.
Even if I thought my lenses or bodies were slightly off, are there any other ideas before I send them off and spend a few hundred dollars?
From what you say in your first post, you are using multi point focus? I have found they work best with centre point focus only. If this does not work, perhaps you have a bad TC
