I was going to buy Canon EF-S 55-250mm f4-5.6 IS lens from eBay. But I saw there is a another lens available as MK II with same focal lengths. I googled to find difference between above lenses, but there were no results for that.
Can anyone explain the difference between these two lenses? Something I noticed is that the MK II lens is priced a little bit higher than the other.