« on: November 27, 2013, 01:29:10 PM »
I should mention that the test was conducted at:
- 70mm at 3.5 meters.
- Peak search before the test.
- EV 11.4
- Center point focus with evaluative metering.
When you run an aperture test it AF at the first, if it looses focus your results will look like this.
Make sure your viewfinder is covered. Check for possible vibration in your tripod.
Make sure you AFMA is correct. Make sure your target is the same height from floor as your camera, set up square and level.
Try it on both 5D II and 5D III bodies to see if you get the same results.
Thank you for your reply.
The tripod and the target were level. I was very careful setting it up. The eye piece was also covered. I also tried on both the 5D II and 5D III with similar results.
I had also recalibrated the lens last night. It's at -1 Telephoto, and +5 Wide.
Unfortunately Canon has kept this lens for 6 weeks prior, which is longer than I actually had possession of it. I was 4 days past the return date when I first noticed the decentered element and the store I bought it from would do nothing for me in terms of exchanging it, so I sent it in.