Hi there, I am new to wide angle photography. I have a Tamron 28- 200zoom which is not very good, however I can buy a prime sigma 24mm f2.8 for the same price as a minolta 28mm f2.8. Both of them are used in mint condition. I know that the price of a Minolta 24mm f2.8 is quite high (compared to what I'd have to pay for this Sigma). Which one would you recommend to get me started in wideangle landscapes? I already tried some with teh Tamron zoom, and I personally feel attracted to the 24mm, but probably the quality of the minolta glass is better but unless I hear comments that this sigma lens is a bad one, I will buy it. THanks for your help.