I am traveling to Arizona for a two week vacation and thought it would be a great opportunity to play with some filters on my D300.<BR><BR>My kit is:<BR>Nikkor 18-200 VR<BR>Sigma 10-20<BR>Nikkor 50mm ...

Lens adapters allow photographers to expand their options beyond just a single mount size, but now the lens accessory designer Kipon has added another option — a built-in neutral density filter.