so who has a camera that can do it and has calibrated his/her lenses? i just did it and the results were somewhat shocking:instructions said:
body:
Canon 5D Mk II. firmware 1.0.7.
lenses and adjustments required:
Sigma 12-24mm f/4.5-5.6: +13
Canon 24-105mm f/4L IS: +2
Canon 50mm f/1.4: -17
Canon 135mm f/2L: -4
legend:
positive = focus had to be adjusted backwards, ie, it was frontfocusing before. negative is the opposite.
notes:
- as you can see there was no clear front- or back-focusing trend in the body itself but several of my lenses were way off!
- the 50mm has been in the shop to be rebuilt quite recently, and it was never reliably sharp wide open
- i almost always shoot the 12-24 stopped down in manual focus but had noticed that it wasn't sharp wide open up close before
- all zooms were tested at their maximum focal length per the page's instructions
- finally, at the listed settings the results were repeatable in that there was no movement after focusing to the pattern/moiré in liveview and then using the AF, going back and forth
in the spirit of the thread, a wide open shot on the 50mm:
