so I have 60D with 24-105L and I`m more than happy when I`m outside. It covers my need for a walk around lens, trips, holidays, walks with family etc.
Now I need second lenses, something exclusively for taking pictures of family occasions (like birthday party), gigs with friends, meetings at office or pictures of my my kid playing at home. So something fast, low light capable and wide enough to catch people in room without needing me to go outside and shoot through the window I don`t like to use flash. I plan to finish my photo gear with this lenses, ultimate one to take outside is done and now I`m looking for ultimate one to indoor use.
Mind that 60D is not some high ISO beast, so I was leaning for fast prime and was fixed to get EF 28mm f1.8 (tried 50 f1.8 and it was far too narrow, was literally walking with my back touching the walls in my flat to take some pictures).
Now, when my wallet is ready to buy it I started to think about EF 17-40mm f4.0 L. It`s wider, great focal lengths, L quality, good campanion to 24-105L but... only f4.0.
So it`s 28mm f1.8 vs 17-40mm f4.0L @ indoor casual shooting with 60D.
Throw some thoughts please.