Hello photo enthusiast,
New guy here (my brief intro) https://photography-on-the.net …/showthread.php?t=1143258
2 weeks ago my wife got me a wonderful bday gift - 24-70L. Outside my kit lens (28-135) this is my first lens. Other than attaching it to my 50d and going on a photo walk what else should I do?
I read/heard about:
-lens calibrating - is this necessary? If so how do I go about doing it?
-tips and tricks to determine if there are any flaws - what are they?
-warranty card - do you fill it out? reason I ask is because I notice used lens for sale with warranty card
Other than the mentioned is there anything else that I should keep me mind for future lenses?
Thank you for all your input 


