Canon

I got my 50 1.4 a more then year ago was never happy with wide open because of
green and purple halo around bright contrast objects! And I thought I
got defected lens and never used it at 1.4-1.8!

But recently my friend got one and to my surprise he has same effect!
So what that suppose to mean?! I thought 50 1.4 one of the best
affordable lens, but I a bunch of situation it just completely
unusable!!!!!

Samples below are from Canon XSi:

If you have Firmware/Flash/Lang pack we don't have on the website... please send us the link and we put it on MM with your name like contributor!

Thank you!

If you know how to disassemble phone and have illustration of the process, please drop me a message here, in comments. Thanks!