Originally Posted by codiac2600
The onloy thing you're no considering is the 55-300 is an extremely sharp lens and overlap wise provides the least amount of overlap with the new kit lens. The 55-300 is designed to be sharper edge to edge for the K20D and I don't think any of the Tamron super zooms will compete with contrast and sharpness with this lens. It's just my opinion but I loved it and the build quality is great.
Chris: Would you consider this to be a good upgrade over the 50-200mm?? I am considering one of the two for occasional tele zoom. I've used the Canon 70-200mm f/4L in the past. Loved the IQ but not the size and weight.
mark