« on: February 08, 2012, 05:02:22 AM »
As far as EF-S goes my guess would be that part of the reason for the 24mm and 28mm's being revamped is to potentially sell them to crop users as 40-45mm standards. Add in IS aswell and you have the potental for a very compact and versatile setup on a Rebel.
At f / 2.8? That's so slow: in most circumstances outside of landscapes, I suspect most photographers would rather have the Canon 28mm f / 1.8 or Sigma 30mm f / 1.4, shoot at 2 – 2.4, and, if people are involved, increase the shutter speed.
I posited this elsewhere, but perhaps Canon is using these two lenses as "test run" to see if people really value IS and will pay substantially more for it.
Landscapes are going to be part of most peoples general purpose shooting I'd guess plus with the Sigma your looking at a lens that weighs twice as much.
In todays market with decent high ISO and mirrorless options the worth of primes has I'd say become more about space saving.
If anything else follows I'd guess it will be the 35mm f/2 and 50mm 1.4 rather than any of the long/more specialist lenses.