FOR SALE : B&W +4 CLOSE UP DIOPTER (NL-4) 77mm
Excellent condition B&W +4 Diopter, only ever used inside of a housing. Glass is clean with no scratches. Selling as upgraded from the Nikon 12-24mm to 10-24mm, which requires a +2 Diopter.
This +4 diopter is required to help many popular midrange zoom lenses function behind dome ports. It will stop your images having soft corners. Sells for $98 at Backscatter (see http://www.backscatt.../so-76473.lasso), will accept $65 including worldwide shipping from Thailand.
Any questions please email firstname.lastname@example.org.