I just bought a sigma 50mm 1.4 (canon) from JTphotoworld first copy of my lens there's a dust inside so i have to take it back so they gave me a 2nd copy and now late i discover the full manual focus switch is not working

can you guys gave me an advise where can i take my lens and have it fix or
jtphotoworld is also fixing sigma lens



thank you in the future! :)

if you got it from them, send it back to them (warranty?). and yes, i think jtphotoworld will even calibrate/fix the lens for you.

Just bring it back from where you bought it. :)