Ok, I have read from many horrifying reviews that many lenses (cheap and expensive) have some defects that need calibration after buying them, eg focus shifts, AF inconsistencies, severe CA, lens mis-alignments etc. Sounds like it is a must to test the lenses thoroughly with those testing charts which is so troublesome. This is really scary that spending hundreds to thousands of dollars can bring more nightmares than having the simple enjoyment of photography.
Are the manufacturers' QC really so bad? I am wondering if this problem is really exagerrated by the internet users where only those people who have experienced lens problems cared to post their comments while the majority of those with the good lens just keep quiet about it.
Do you guys experience QC issues when buying lenses?
Do the shops (eg. at Funan) let people test the lenses using those charts, like the ruler test?
Or can you share your buying experiences?
I hope that such paranoia and kiasu-ness are just probably the result of over-reading from the internet.