Lente ou apartamento?
Volta e meia essa lente aparece à venda.Ela continua sem paralelo, ou hoje em dia é peça de museu?
Qual era o uso dessas lentes?
The 6mm Fisheye-Nikkor lense is designed according to a equidistant projection formula such as used in the 8mm f/2.8 Fisheye-Nikkor lense, but because of it has a wider picture angle, it offers an even more dramatic impact visually. This series of lenses were originally developed for special scientific and industrial use where wider-than-180° picture coverage is required in surveillance work, photographing the interiors of pipes, boilers, conduits, cylinder bores and other constricted areas. But in applications such as advertising and commercial photography they are used extensively for dramatic effects.fonte:https://www.mir.com.my/rb/photography/companies/nikon/nikkoresources/fisheyes/6mmf28.htm