Well i finally took the Kenko 2x Teleconverter out for a spin today, all pics were taken at 400 mmm.

Was a tad concerned about the performance but surprisingly enough it's pretty good.

Heard this flock of Cormorants over my head before i even saw them. Managed to unzip (luv the toploader) quickly and pop the cap, the autofocus with the tele is still pretty quick and i managed to get a lock before they sped by.

Even with multiple close surrounding targets it managed quite well to lock on to the main subject didn't seem to wonder.
Mini you have some excellent shots and that's quite the gallery, what focal length do you usually shoot with?
Also do you guys have any tips on swapping out of lenses in the field or do you just stay with one. Tips on lens care, cleaning and and keeping the DLSR sensor from harms way yada...yada.
Thx..cheers...