After years of patience and search I've found the housing I always wanted the sturdy Aquatica 3 for Nikon Why? I like velvia and provia underwater and self develop, sort of a direct approach with photography But in order to use it properly underwater I need some missing stuff: a shutter speed cap and coupling gears for a nikkor 20mm f2.8 The 1st solution is to machine them BUT if someone has spars and most likely interest to sell or contribute sending measures for a good cause I'll be happy Any help or hint is appreciated Cheers Alex