K&F Concept 100x100mm (4x4”) Natural Night lens mount_Nikonos It accepts eight AA batteries

It accepts eight AA batteries (not included) and connects via a coiled cable to the external power socket of the SB900/910 for faster recharge times and longer life than the four built-in batteries

That might sound (and look) weird

you will need at least one more Pocketwizard device to trigger a camera or flash as described above

4 aperture and lovely image rendering

If this Calypso looks familiar

K&F Concept 100x100mm (4x4”) Natural Night lens mount_Nikonos It accepts eight AA batteriesThe K&F Concept Natural Night filter is deisgned to filter out light pollution in night shots and it works! Neutralizes colours and increases contrast by filtering out the most dulling wavelengths of light emitted by streetlamps and other low CRI infrastructure lighting. This is a 100x100mm (4x4) filter designed to fit compatible filter holders and matteboxes (not included). In excellent condition.