NEX-5N autofocus in action to capture these ducks in flight.
Sony NEX-5N with 55-210mm OSS and DH1758 1.7x Conversion Lens
Here are some excellent photos produced by the NEX-5N and the 55-210mm OSS lens with a 1.7x Tele Conversion lens attached taken by zackiedawg. He uses the NEX-5N in A or S mode with Auto ISO. He makes sure that the shutter speed is fast enough to eliminate any camera movement. Autofocus is set to AF-S. He is producing excellent results with such a portable setup.
Here is zackiedawg's description of the VCL-DH1758 1.7x Tele Conversion Lens:
For those unfamiliar, these tele-extenders screw on to the filter threads on the end of the lens, and optically magnify the lens without light loss - so the effective range of the 55-210mm lens with the 1.7x extender onboard goes from 210mm max to 357mm max. This is a very useful range on the NEX body, given the 1.5x crop which allows for over 500mm effective range, and the fact that it loses no additional light means a slowish lens like the 55-210mm isn't hampered further which would have killed AF - instead, AF remains perfectly fast and reliable in all light, just as without the extender.
All images are by zackiedawg and clicking on them will lead you to full size images from his pbase account.
Squirrel and Squirrel at 100% crop
Blue-winged teal duck
VCL-DH1758 attached to the 55-210mm OSS via 49mm to 58mm step up ring.