TAMRON 17-50mm F4 vs TAMRON 20-40mm F2.8 - Mini COMPARISON 

I've been using the Tamron 17-50mm F4 lens for a while now. Recently I had a chance to buy the Tamron 20-40mm F2.8 on a very reasonable used price. I'm trying to compare them and give a brief overview of them.
Chapters:
00:00 - 01:00 - Intro
01:01 - 04:37 - Build quality and features
04:38 - 06:35 - Test Images
06:36 - 07:25 - Flare resistance
07:26 - 08:07 - Bokeh
08:08 - 09:16 - Sharpness
09:17 - 11:06 - Conclusion
LINK TO THE FULL SIZE SOOC IMAGES:
www.flickr.com/photos/lightsa...