Been wandering which are the more popular sigma telezoom lens:
1. Sigma APO 100-300mm f4 EX IF HSM
2. Sigma 120-300mm f2.8 EX APO HSM
3. Sigma 70-200mm f2.8 EX APO IF HSM
4. Sigma 50-500mm f4-6.3 EX APO RF HSM
And how good is the Sigma APO 100-300mm f4 EX IF HSM?... I'm eyeing this lens particulary...