Easy to tell ... without squintin'
In a series of duplicatable candids ...
I decided to shot the box ... with both the SONY 18-70mm & the TAMRON 17-50mm
The shots were done with the α700, in manual, at the following settings: 50mm - f/5.6 - 1/60 sec - ISO-400 WB = "flash" -1, using the pop-up flash (so no funny stuff) :cool: Honestly, just a pair of candids you can do yourself, at the store.
I'm bracketing the crops with their respective overall shots.
SONY 17-80mm crop
(Picture in picture ... pretty funny, huh? Ah, go on with ya!)
TAMRON 17-50mm crop
Remember, this is shot a minmum focus distance ... 15 inches, so it is about as sharp as you can get with these lenses. Even this close ... the TAMRON just slaps the horse-snot out of the SONY. :p When I'm shooting ... I want it sharp. Try as it will, the SONY 18-70 cannot deliver it. Everything will always have the annoying fuzzy aspect (focus softening) to it. Drove me to ... plastic!