Upload & Sell: Off
The G21 was a great little lens, but I got tired of worrying about mounting it with perfect alignment of the fins and scratching the insides. The alternative is to trim the fins off. Also, I don't like using extra tools in my flow to correct corners (Corner Fix).
For the 100-300, it was indeed an incredible lens. However, I did not like the weight, bulk, and especially did not like the zoom creep. Very difficult to carry around and shoot with.
With the advances in aspherical telephoto lens designs, I think I don't need an old manual focus lens for these focal lengths.
Also, I realized that I enjoy MF lenses, especially Zeiss with their incredible micro-contrast, but am not willing to use them under all situations. That is why I am looking for a lightweight zoom lens with similar optical qualities to the Zeiss prime optics. If only a manufacturer would build such a lens, I would change systems and buy it immediately. The recent Panasonic 12-35 and upcoming Zuiko 12-60 give me hope that Sony/Zeiss will be forced into offering some decent zoom lenses for NEX. In my opinion, its quite unfathonable that they have not already done so!