Now i have 40D(ohh the gear list is in the signature), but i want to buy 5d2.
So i can`t use my lovely and amazing sigma 10-20 with FF and i need some FF wide angle lens.
So i read internet few days on this topic and i see that the best wide agle lens(which can mount on FF) is 16-35mm II L (that is my imho, after reading).
But there is one problem for me with 16-35 - as i was newb in photography i bought all my filters for 77mm (as the sigma 10-20 has the biggest diameter of all my lenses) and never thought about future, and this lens has 82mm .
So i started to read more and the next good lens is 17-40L, which has the diameter that i need - 77mm(as my sigma).
So the question is - must i forget about my filters and buy the 16-35 or get 17-40?
I realy do not need 2.8 (on 5d2 which iso 3200 is fantastic) and 16mm that has 16-35 II,so the only reason is,that it seems more sharper and have great colors,then 17-40, or not?
Or maybe you can advise some other lenses, maybe not zooms?
In the begining i want the perfect 17 TS-E, but there is no chance to mount a filter at all...
And i do not know what to do with Tamron 17-50 and Sigma 10-20, sell or
leave it for crop. Sigma is realy great wide angle lens...
P.S. Sorry for bad english.