Ok it's obvious that tamron easily beats the sigma due to huge difference between ranges of these glasses. However I wonder that how big the difference of IQ results of them.
I think 50mm reach is enough for me (at least I've never confronted with any case I need to use more reach) but as a travel lens more reach maybe a better option.
Another point is that there is a considerable price difference as a reason for me to go with sigma but still I'm nervous about sharpness of it.
Is there any user who used both of them to compare.