If you have the opportunity to buy a kit with an stm-marked lens, even if itβs a couple of thousand more expensive, then take it without thinking, you wonβt regret it, this is still yesterday. Has some pros In kit almost nothing comes out. Quite well made. Acceptably draws, unless of course you print a photo the size of a house. It is not a pity, you can experiment as much as you like. Got cons: The front lens rotates when focusing. It is inconvenient to use with a CPL filter and a figured hood. The presence of backlash when focusing.