I'm trying to figure out the difference between the IS MKII lens and the IS STM lens.
Specifically, I am looking at the Canon EF-S 18-55mm f/3.5-5.6 lens. On that Amazon page, there are three options; of the EF-S, one is listed as IS MK II; the other is IS STM.
I'm still not sure which is best to purchase - given the comparable price - I have heard pros and cons of each.
I understand that STM is a newer lens technology w/ a stepper motor for focusing, if I understand correctly, on manual focus, rather than adjusting the focus directly, you adjust the focus ring, and the stepper motor brings the lens to that focus point.
I have read that STM can be slower to focus than USM - however, I don't think the MK II has USM. The STM is supposed to be quieter, and thus better for AF while filming video.
Since the STM lens is newer (I think), is there any reason to buy the MK II? (The MK II is actually more expensive on the page listed.) Are there benefits to it, or pitfalls to the STM that I should consider?
Side note; my camera is an older Rebel XS; I'm not sure if the STM will work fully with it.