Sorry about the misleading title, but this is not a pros and cons debate about them..
So please do not flame each other for that sake.
I was told by some photographer that..
Canon 17-40L's 17mm field of view angle is larger than Tamron 17-50's 17mm field of view angle..
Does anyone know about this and confirm it either way?
According to him.. there is a chunk of difference in them..
104 degree vs. 78 degree..
That can't be right..
I'm thinking.. he must have read the specification of 17-40L with FF as a reference.. and Tamron 17-50 with APS-C as a reference..