You WANT the IS lens.
IMHO, today a long lens without IS is seriously disadvantaged, and generally not worth buying, for the average photographer. Because, once you use a long lens with IS, you will never want to use a long lens without IS.
The non-IS lenses are used by Canon (and Nikon) to build a kit with a lower price point.
"My kit is cheaper than your kit."
There is no regard to usability. Because it is the long lens that needs IS more than the short lens.
50-250 vs 70-300.
The long end is close enough as to be essentially the same. The 300 is only 20% longer than the 250.
To me, it is the short end where the difference really is. BUT, how important is the short end to YOU?
- Example1: Having used a 70-200 on a crop camera on the football field, I can tell you that the 70mm end is frequently too long, for me, when the players get close. In that case I would pick the shorter 50-250 over the longer 70-300, just for the wider short end.
- Note, I am on the field, next to the sidelines, not in the bleachers.
- Example2: If you want it to shoot your son's softball/baseball, then the 70-300 would be the better lens, for shooting that sport. Cuz you will be mostly on the longer side of the zoom, and not down at the short end.
- Example3: If you do birding and wildlife, then the short end is really of little value, and you want the longest lens that you can get. So the 70-300 is the better choice, in that case.
I "
think" the USM lens focuses faster, but the STM lens is quieter (for video).
Warning: "Amazon renewed"
"Renewed" = refurbished = used
But WHO is doing the refurbishment, and what are they doing?
Is it simply wipe and clean, or are the actually testing the lenses?
I personally treat non-manufacture refurbs as a "used" item.
If you want to go refurb, get a MANUFACTURER refub. Check the Canon USA site. They sometimes have great deals. And Canon mfg refurb have a Canon 1 year warranty.
BTW, the 55-250 is an EF-S/APS-C crop lens, the 70-300 is a EF/FF lens. The EF lens is bigger because it is meant to work with a larger format camera.